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2018-04-26 | Ultrasensitive Detection Enabled by Nonlinear Magnetization of Nanomagnetic Labels | Geometrically confined magnetic particles due to their unique response to
external magnetic fields find a variety of applications, including magnetic
guidance, heat and drug delivery, magneto-mechanical actuation, and contrast
enhancement. Highly sensitive detection and imaging techniques based on
nonlinear properties ... | 1804.09908v1 |
2019-03-04 | Strong magnetoelastic effect in CeCo$_{1-x}$Fe$_{x}$Si as Néel order is suppressed | A very strong magnetoelastic effect in the CeCo$_{1-x}$Fe$_{x}$Si alloys is
reported. The strength of the magnetostrictive effect can be tuned upon
changing $x$. The moderate low-temperature linear magnetostriction observed at
low Fe concentrations becomes very large ($\frac {\Delta L}{L} \left(16 T,2
K\right) =$ 3$\ti... | 1903.01383v1 |
2019-03-07 | Electromechanical actuation of pristine graphene and graphene oxide: origin, optimization, and comparison | It is well recognized that the miniaturization of electromechanical devices
will bring a revolution to humanity in the coming decades synonymous with the
effects of miniaturizing electronic devices in those previous. An
electromechanical actuator - a device that converts electrical energy to
mechanical deformation or m... | 1903.02729v1 |
2019-03-07 | Correction of Electron Back-scattered Diffraction datasets using an evolutionary algorithm | In materials science and particularly electron microscopy, Electron
Back-scatter Diffraction (EBSD) is a common and powerful mapping technique for
collecting local crystallographic data at the sub-micron scale. The quality of
the reconstruction of the maps is critical to study the spatial distribution of
phases and cry... | 1903.02982v1 |
2019-03-11 | THz emission from Co/Pt bilayers with varied roughness, crystal structure, and interface intermixing | Femtosecond laser excitation of a Co/Pt bilayer results in the efficient
emission of picosecond THz pulses. Two known mechanisms for generating THz
emission are spin-polarized currents through a Co/Pt interface, resulting in
helicity-independent electric currents in the Pt layer due to the inverse
spin-Hall effect and ... | 1903.04423v2 |
2019-03-13 | Thickness dependence of magnetization reversal and magnetostriction in FeGa thin films | Among the magnetostrictive alloys the one formed of iron and gallium (called
"Galfenol" from its U.S. Office of Naval Research discoverers in the late 90's)
is attractive for its low hysteresis, good tensile stress, good machinability
and its rare-earth free composition. One of its applications is its association
with ... | 1903.05397v2 |
2019-03-15 | Additively manufactured ultra-high vacuum chamber below $10^{-10}$ mbar | Metal-based additive manufacturing (AM) represents a paradigm change in
engineering and production methods across multiple industries and sectors. AM
methods enable mass reduction and performance optimisation well beyond that
achievable via conventional manufacturing, thereby impacting significantly on
aerospace and sp... | 1903.07708v3 |
2019-03-22 | Advanced Non-Destructive in Situ Characterization of Metals with the French Collaborating Research Group D2AM/BM02 Beamline at the European Synchrotron Radiation Facility | The ability to non-destructively measure the structural properties of
devices, either in situ or operando, are now possible using an intense X-ray
synchrotron source combined with specialized equipment. This tool attracted
researchers, in particular metallurgists, to attempt more complex and ambitious
experiments aimed... | 1903.09390v1 |
2019-03-25 | Effect of the Thickness on the Fracturing Behavior of Discontinuous Fiber Composite Structures | In this study, we investigate experimentally and numerically the mode I
intra-laminar fracture and size effect of Discontinuous Fiber Composites (DFCs)
as a function of the structure thicknesses.
By testing geometrically-scaled Single Edge Notch Tension (SENT) specimens a
notable structure size effect on the nominal ... | 1903.10539v1 |
2019-03-28 | Nanostructure phase and interface engineering via controlled Au self-assembly on GaAs(001) surface | We have investigated the temperature-dependent morphology and composition
changes occurring during a controlled self-assembling of thin Au film on the
Gallium arsenide (001) surface utilizing electron microscopy at nano and atomic
levels. It has been found that the deposition of 2 ML of Au at a substrate
temperature lo... | 1903.12028v2 |
2019-05-09 | Phase domain boundary motion and memristance in gradient-doped FeRh nanopillars induced by spin injection | The B2-ordered alloy FeRh shows a metamagnetic phase transition, transforming
from antiferromagnetic (AF) to ferromagnetic (FM) order at a temperature
$T_\mathrm{t} \sim 380 $~K in bulk. As well as temperature, the phase
transition can be triggered by many means such as strain, chemical doping, or
magnetic or electric ... | 1905.03573v3 |
2019-05-13 | First-principles high pressure studies on group-14 element pernitrides | The search for ultra hard materials is inevitable in high pressure device
applications. Nitrides of group-14 elements have been foreseen as potential
candidates in replacing existing hard materials. In a recent experiment, pyrite
structures of SiN2, GeN2 and SnN2 have been synthesized at high pressure and
were shown to... | 1905.04950v2 |
2019-05-13 | Kinetics of phase separation, border of miscibility gap in Fe-Cr and limit of Cr solubility in iron at 832 K | Kinetics of phase decomposition accompanied by precipitation of sigma-phase
in a Fe73.7Cr26.3 alloy isothermally annealed at 832 K was studied by means of
M\"ossbauer spectroscopy. Two stage decomposition process has been revealed by
three different quantities viz. the average hyperfine field, <H>, the
short-range para... | 1905.05156v1 |
2019-05-16 | Dimensional crossover and topological nature of the thin films of a three-dimensional topological insulator by band gap engineering | Identification and control of topological phases in topological thin films
offer great opportunity for fundamental research and the fabrication of
topology-based devices. Here, combining molecular beam epitaxy, angle-resolved
photoemission spectroscopy and ab-initio calculations, we investigate the
electronic structure... | 1905.06776v1 |
2019-05-16 | Novel Hierarchical Correlation Functions for Quantitative Representation of Complex Heterogeneous Materials and Microstructural Evolution | Effective and accurate characterization and quantification of complex
microstructure of a heterogeneous material and its evolution under external
stimuli are very challenging, yet crucial to achieving reliable material
performance prediction, processing optimization and advanced material design.
Here, we address this c... | 1905.06979v1 |
2019-05-21 | A Controllable and Highly Propagative Hybrid Surface Plasmon-Phonon Polariton in a CdZnO-based Two-Interface System | The development of new nanophotonic devices requires the understanding and
modulation of the propagating surface plasmon and phonon modes arising in
plasmonic and polar dielectric materials, respectively. Here we explore the
CdZnO alloy as a plasmonic material, with a tunable plasma frequency and
reduced losses compare... | 1905.08660v1 |
2019-05-27 | Magnetic control of flexible thermoelectric devices based on macroscopic 3D interconnected nanowire networks | Spin-related effects in thermoelectricity can be used to design more
efficient refrigerators and offer novel promising applications for the
harvesting of thermal energy. The key challenge is to design structural and
compositional magnetic material systems with sufficiently high efficiency and
power output for transform... | 1905.11072v1 |
2019-05-27 | Time-resolved imaging of non-diffusive carrier transport in long-lifetime halide perovskite thin films | Owing to their exceptional semiconducting properties, hybrid
inorganic-organic perovskites show great promise as photovoltaic absorbers. In
these materials, long-range diffusion of charge carriers allows for most of the
photogenerated carriers to contribute to the photovoltaic efficiency. Here,
time-resolved photolumin... | 1905.11242v1 |
2019-05-29 | Circular photocurrent in Weyl semimetals with mirror symmetry | We have studied theoretically the Weyl semimetals the point symmetry group of
which has reflection planes and which contain equivalent valleys with opposite
chiralities. These include the most frequently studied compounds, namely the
transition metals monopnictides TaAs, NbAs, TaP, NbP, and also Bi$_{1-x}$Sb$_x$
alloys... | 1905.12273v1 |
2019-08-01 | The CLASS 150/220 GHz Polarimeter Array: Design, Assembly, and Characterization | We report on the development of a polarization-sensitive dichroic (150/220
GHz) detector array for the Cosmology Large Angular Scale Surveyor (CLASS)
delivered to the telescope site in June 2019. In concert with existing 40 and
90 GHz telescopes, the 150/220 GHz telescope will make observations of the
cosmic microwave ... | 1908.00480v2 |
2019-08-04 | Prediction of three-fold fermions in a nearly-ideal Dirac semimetal BaAgAs | Materials with triply-degenerate nodal points in their low-energy electronic
spectrum produce crystalline-symmetry-enforced three-fold fermions, which
conceptually lie between the two-fold Weyl and four-fold Dirac fermions. Here
we show how a silver-based Dirac semimetal BaAgAs realizes three-fold fermions
through our ... | 1908.01336v1 |
2019-08-12 | Advancing characterisation with statistics from correlative electron diffraction and X-ray spectroscopy, in the scanning electron microscope | The routine and unique determination of minor phases in microstructures is
critical to materials science. In metallurgy alone, applications include alloy
and process development and the understanding of degradation in service. We
develop a correlative method, exploring superalloy microstructures which are
examined in t... | 1908.04084v2 |
2019-08-25 | Sputtered MoRe SQUID-on-tip for high-field magnetic and thermal nanoimaging | Scanning nanoscale superconducting quantum interference devices (SQUIDs) are
gaining interest as highly sensitive microscopic magnetic and thermal
characterization tools of quantum and topological states of matter and devices.
Here we introduce a novel technique of collimated differential-pressure
magnetron sputtering ... | 1908.09305v1 |
2019-08-29 | Fully analytic valence force field model for the elastic and inner elastic properties of diamond and zincblende crystals | Using a valence force field model based on that introduced by Martin, we
present three related methods through which we analytically determine valence
force field parameters. The methods introduced allow easy derivation of valence
force field parameters in terms of the Kleinman parameter $\zeta$ and bulk
properties of ... | 1908.11245v1 |
2019-09-03 | Boron Arsenide Heterostructures: Lattice-Matched Heterointerfaces, and Strain Effects on Band Alignments and Mobility | BAs is III-V semiconductor with ultra-high thermal conductivity, but many of
its electronic properties are unknown. This work applies predictive atomistic
calculations to investigate the properties of BAs heterostructures, such as
strain effects on band alignments and carrier mobility, considering BAs as both
a thin fi... | 1909.01449v1 |
2019-09-16 | Ferrovolcanism on metal worlds and the origin of pallasites | As differentiated planetesimals cool, their cores can solidify from the
outside-in, as evidenced by paleomagnetic measurements and cooling rate
estimates of iron meteorites. The details of outside-in solidification and fate
of residual core melt are poorly understood. For a core primarily composed of
Fe and Ni alloyed ... | 1909.07451v1 |
2019-09-19 | Modeling and simulation of heat source trajectories through phase-change materials | The modeling and simulation of heat source trajectories through phase-change
materials is a relevant problem both for space exploration and for terrestrial
climate research, among other fields. In space, the DLR and NASA are both
interested in exploring beneath the surfaces of icy moons, primarily Enceladus
and Europa,... | 1909.08882v1 |
2019-09-21 | Tailoring the optical and physical properties of La doped ZnO nanostructured thin films | The modification and tailoring the characteristics of nanostructured
materials are of great interest due to controllable and unusual inherent
properties in such materials. A simple spray pyrolysis technique is used to
prepare pure and La-doped ZnO films. The influence of La concentration (0,
0.33, 0.45, 0.66, 0.92 and ... | 1909.09869v1 |
2019-09-28 | Quantification of 3D spatial correlations between state variables and distances to the grain boundary network in full-field crystal plasticity spectral method simulations | Deformation microstructure heterogeneities play a pivotal role during
dislocation patterning and interface network restructuring. Thus, they affect
indirectly how an alloy recrystallizes if at all. Given this relevance, it has
become common practice to study the evolution of deformation microstructure
heterogeneities w... | 1909.13038v1 |
2019-12-03 | Crystal structure, cobalt and iron speciation and oxygen non-stoichiometry of La0.6Sr0.4Co1-yFeyO3-d nanorods for IT-SOFC cathodes | Single-phased La0.6Sr0.4Co1-yFeyO3-d (y = 0.2, 0.5, 0.8) nanorods exhibiting
the rhombohedral perovskite-type phase were synthesized by a pore-wetting
technique. We studied their chemical composition, crystal and electronic
structures, morphology and hyperfine properties as a function of the Co/Fe
content of the sample... | 1912.01631v1 |
2019-12-09 | Nature of the 5$f$ electronic structure of plutonium | Plutonium (Pu), in which the 5$f$ valence electrons always wander the
boundary between localized and itinerant states, exhibits quite complex crystal
structures and unprecedentedly anomalous properties with respect to temperature
and alloying. Understanding its chemical and physical properties, especially
its 5$f$ elec... | 1912.04040v1 |
2019-12-10 | Tropical Limit for Configurational Geometry in Discrete Thermodynamic Systems | For classical discrete systems with constant composition (typically referred
to substitutional alloys) under thermodynamically equilibrium state,
macroscopic structure should in principle depend on temperature and many-body
interaction through Boltzmann factor, exp(-bE). Despite this fact, our recently
find that (i) th... | 1912.04528v2 |
2019-12-11 | Ab initio approach to the elastic, electronic, and optical properties of MoTe2: A topological Weyl semimetal | The topological Weyl semimetal MoTe2, in the orthorhombic phase, is an
important system both from the point of view of fundamental physics and
potential applications. In this study we have investigated the elastic,
electronic, bonding and optical properties of MoTe2 using density functional
theory. Study of the elastic... | 1912.05112v1 |
2019-12-12 | CRNs Exposed: Systematic Exploration of Chemical Reaction Networks | Formal methods have enabled breakthroughs in many fields, such as in hardware
verification, machine learning and biological systems. The key object of
interest in systems biology, synthetic biology, and molecular programming is
chemical reaction networks (CRNs) which formalizes coupled chemical reactions
in a well-mixe... | 1912.06197v2 |
2019-12-16 | Asymmetric Magnetic Relaxation behavior of Domains and Domain Walls Observed Through the FeRh First-Order Metamagnetic Phase Transition | The phase coexistence present through a first-order phase transition means
there will be finite regions between the two phases where the structure of the
system will vary from one phase to the other, known as a phase boundary wall.
This region is said to play an important but unknown role in the dynamics of
the first-o... | 1912.07635v3 |
2019-12-25 | A Study of the Learnability of Relational Properties: Model Counting Meets Machine Learning (MCML) | This paper introduces the MCML approach for empirically studying the
learnability of relational properties that can be expressed in the well-known
software design language Alloy. A key novelty of MCML is quantification of the
performance of and semantic differences among trained machine learning (ML)
models, specifical... | 1912.11580v2 |
2020-02-15 | Understanding high ordering temperature in Gd$_6$FeBi$_2$ magnet: critical behavior, electronic structure and crystal-field analysis | Gd6FeBi2 is reported as the only one room-temperature magnet with a Curie
temperature (Tc) of ca. 350 K among more than hundreds of compounds with its
structural type, which makes it more attractive in potential applications. To
reveal the origin of such high ordering temperature, critical behaviors,
electronic structu... | 2002.06402v1 |
2020-02-17 | Optimization and Validation of a Deep Learning CuZr Atomistic Potential: Robust Applications for Crystalline and Amorphous Phases with near-DFT Accuracy | We show that a deep-learning neural network potential (DP) based on density
functional theory (DFT) calculations can well describe Cu-Zr materials, an
example of a binary alloy system that can coexist in several ordered
intermetallics and as an amorphous phase. The complex phase diagram for Cu-Zr
makes it a challenging... | 2002.06763v1 |
2020-02-18 | Flow regimes of Rayleigh-Bénard convection in a vertical magnetic field | The effects of a vertical static magnetic field on the flow structure and
global transport properties of momentum and heat in liquid metal
Rayleigh-B\'enard convection are investigated. Experiments are conducted in a
cylindrical convection cell of unity aspect ratio, filled with the alloy GaInSn
at a low Prandtl number... | 2002.07414v1 |
2020-02-24 | Flexible Amorphous Superconducting Materials and Quantum Devices with Unexpected Tunability | In superconductivity, electrons exhibit unique macroscopic collective quantum
behavior that is the key for many modern quantum technologies. This electron
behavior stems vastly from coupling to a correlated motion of atoms in the
material, as well as from synchronized directional movement that screens
external magnetic... | 2002.10297v2 |
2020-03-02 | On the appearance of fractional operators in non-linear stress-strain relation of metals | Finding an accurate stress-strain relation, able to describe the mechanical
behavior of metals during {forming} and machining processes, is an important
challenge in several fields of mechanics, with significant repercussions in the
technological field. Indeed, in order to predict the real mechanical behavior
of materi... | 2003.00756v1 |
2020-03-02 | An integral method for the calculation of the reduction in interfacial free energy due to interfacial segregation | A method based on the Gibbs' adsorption isotherm is developed to calculate
the decrease in interfacial free energy resulting from solute segregation at an
internal interface, built on measured concentration profiles. Utilizing
atom-probe tomography (APT), we first measure a concentration profile of the
relative interfa... | 2003.01246v1 |
2020-03-04 | A versatile numerical approach for calculating the fracture toughness and R-curves of cellular materials | We develop a numerical methodology for the calculation of mode-I R-curves of
brittle and elastoplastic lattice materials, and unveil the impact of lattice
topology, relative density and constituent material behavior on the toughening
response of 2D isotropic lattices. The approach is based on finite element
calculation... | 2003.01923v2 |
2020-03-05 | Chemical Bonding in Metallic Glasses from Machine Learning and Crystal Orbital Hamilton Population | The chemistry (composition and bonding information) of metallic glasses (MGs)
is at least as important as structural topology for understanding their
properties and production/processing peculiarities. This article reports a
machine learning (ML)-based approach that brings an unprecedented "big picture"
view of chemica... | 2003.02722v3 |
2020-03-06 | Search for axion-like dark matter with ferromagnets | Existence of dark matter indicates the presence of unknown fundamental laws
of nature. Ultralight axion-like particles are well-motivated dark matter
candidates, emerging naturally from theories of physics at ultrahigh energies.
We report the results of a direct search for the electromagnetic interaction of
axion-like ... | 2003.03348v2 |
2020-03-15 | Cost-effective search for lower-error region in material parameter space using multifidelity Gaussian process modeling | Information regarding precipitate shapes is critical for estimating material
parameters. Hence, we considered estimating a region of material parameter
space in which a computational model produces precipitates having shapes
similar to those observed in the experimental images. This region, called the
lower-error regio... | 2003.13428v1 |
2020-03-30 | Slip-hydride interactions in Zircaloy-4: Multiscale mechanical testing and characterisation | The interactions between {\delta}-hydrides and plastic slip in a commercial
zirconium alloy, Zircaloy-4, under stress were studied using in situ secondary
electron microscope (SEM) micropillar compression tests of single crystal
samples and ex situ digital image correlation (DIC) macroscale tensile tests of
polycrystal... | 2003.13610v2 |
2020-06-04 | Hot Hydride Superconductivity above 550 K | The search for room temperature superconductivity has accelerated
dramatically in the last few years driven largely by theoretical predictions
that first indicated alloying dense hydrogen with other elements could produce
conventional phonon-mediated superconductivity at very high temperatures and at
accessible pressur... | 2006.03004v1 |
2020-06-10 | Electron spin-vorticity coupling in low and high Reynolds number pipe flows | Spin hydrodynamic coupling is a recently discovered method to directly
generate electricity from an electrically conducting fluid flow in the absence
of Lorentz forces. This method relies on a collective coupling of electron
spins - the internal quantum mechanical angular momentum of the electrons -
with the local vort... | 2006.05699v1 |
2020-06-10 | Electronic properties of type-II GaAs$_{1-x}$Sb$_{x}$/GaAs quantum rings for applications in intermediate-band solar cells | We present a theoretical analysis of the electronic properties of type-II
GaAs$_{1-x}$Sb$_{x}$/GaAs quantum rings (QRs), from the perspective of
applications in intermediate band solar cells (IBSCs). We outline the
analytical solution of Schr\"{o}dinger's equation for a cylindrical QR of
infinite potential depth, and d... | 2006.05767v1 |
2020-06-14 | Ferroelastic-switching-driven colossal shear strain and piezoelectricity in a hybrid ferroelectric | Materials that can produce large controllable strains are widely used in
shape memory devices, actuators and sensors. Great efforts have been made to
improve the strain outputs of various material systems. Among them,
ferroelastic transitions underpin giant reversible strains in
electrically-driven ferro/piezoelectrics... | 2006.07883v1 |
2020-06-15 | Topological Dirac Semimetal Phase in Bismuth Based Anode Materials for Sodium-Ion Batteries | Bismuth has recently attracted interest in connection with Na-ion battery
anodes due to its high volumetric capacity. It reacts with Na to form Na$_3$Bi
which is a prototypical Dirac semimetal with a nontrivial electronic structure.
Density-functional-theory based first-principles calculations are playing a key
role in... | 2006.08585v1 |
2020-06-19 | Bayesian Optimization with Missing Inputs | Bayesian optimization (BO) is an efficient method for optimizing expensive
black-box functions. In real-world applications, BO often faces a major problem
of missing values in inputs. The missing inputs can happen in two cases. First,
the historical data for training BO often contain missing values. Second, when
perfor... | 2006.10948v1 |
2020-06-21 | Type-II Superconductivity below 4K in Sn0.4Sb0.6 | In this article, we report the occurrence of superconductivity in Sn0.4Sb0.6
single crystal at below 4K. Rietveld refined Powder XRD data confirms the phase
purity of as grown crystal, crystallizing in rhombohedral R-3m space group with
an elongated (2xc) unit cell in c-direction. Scanning Electron Microscope (SEM)
ima... | 2006.11722v1 |
2020-06-24 | Multiscale Simulations of Complex Systems by Learning their Effective Dynamics | Predictive simulations of complex systems are essential for applications
ranging from weather forecasting to drug design. The veracity of these
predictions hinges on their capacity to capture the effective system dynamics.
Massively parallel simulations predict the system dynamics by resolving all
spatiotemporal scales... | 2006.13431v3 |
2020-06-24 | Predicting the propensity for thermally activated $β$ events in metallic glasses via interpretable machine learning | The elementary excitations in metallic glasses (MGs), i.e., $\beta$ processes
that involve hopping between nearby sub-basins, underlie many unusual
properties of the amorphous alloys. A high-efficacy prediction of the
propensity for those activated processes from solely the atomic positions,
however, has remained a dau... | 2006.13552v1 |
2020-06-28 | Self-consistent renormalization group approach to continuous phase transitions in alloys. Application to ordering in $β$-brass | A self-consistent (SC) renormalization group approach of the effective medium
kind has been developed and applied to the solution of the Ising model (IM). A
renormalization group equation in the local potential approximation (LPA)
derived previously for spatially homogeneous systems has been extended to the
lattice cas... | 2006.15533v2 |
2020-06-29 | Irreversible Heat Flow Across Phase Boundaries in Phase-Separated Manganites | We have investigated the change in entropy with direct measurements of heat
flow as a function of magnetic field at fixed temperatures across the entire
phase diagram of the phase-separated (PS) compound
La$_{0.25}$Pr$_{0.375}$Ca$_{0.375}$MnO$_3$ (LPCMO). At this composition, the
compound shows competing charge-ordered... | 2006.16381v2 |
2020-07-07 | Crystal orientation dictated epitaxy of ultrawide bandgap 5.4-8.6 eV $α$-(AlGa)$_2$O$_3$ on m-plane sapphire | Ultra-wide bandgap semiconductors are ushering in the next generation of high
power electronics. The correct crystal orientation can make or break successful
epitaxy of such semiconductors. Here it is discovered that single-crystalline
layers of $\alpha$-(AlGa)$_2$O$_3$ alloys spanning bandgaps of 5.4 - 8.6 eV can
be g... | 2007.03415v2 |
2020-07-09 | Plastic yielding and deformation bursts in the presence of disorder from coherent precipitates | Alloying metals with other elements is often done to improve the material
strength or hardness. A key microscopic mechanism is precipitation hardening,
where precipitates impede dislocation motion, but the role of such obstacles in
determining the nature of collective dislocation dynamics remains to be
understood. Here... | 2007.04724v1 |
2020-07-17 | An ensemble classifier for vibration-based quality monitoring | Vibration-based quality monitoring of manufactured components often employs
pattern recognition methods. Albeit developing several classification methods,
they usually provide high accuracy for specific types of datasets, but not for
general cases. In this paper, this issue has been addressed by developing a
novel ense... | 2007.08789v2 |
2020-07-22 | Impact of Li$_{2.9}$B$_{0.9}$S$_{0.1}$O$_{3.1}$ glass additive on the structure and electrical properties of the LATP-based ceramics | The existing solid electrolytes for lithium ion batteries suffer from low
total ionic conductivity, which restricts its usefulness for the lithium-ion
battery technology. Among them, the NASICON-based materials, such as
Li1.3Al0.3Ti1.7(PO4)3 (LATP) exhibit low total ionic conductivity due to highly
resistant grain boun... | 2007.11244v2 |
2020-07-23 | All-Group IV membrane room-temperature mid-infrared photodetector | Strain engineering has been a ubiquitous paradigm to tailor the electronic
band structure and harness the associated new or enhanced fundamental
properties in semiconductors. In this regard, semiconductor membranes emerged
as a versatile class of nanoscale materials to control lattice strain and
engineer complex hetero... | 2007.12239v2 |
2020-07-27 | Image-driven discriminative and generative machine learning algorithms for establishing microstructure-processing relationships | We investigate methods of microstructure representation for the purpose of
predicting processing condition from microstructure image data. A binary alloy
(uranium-molybdenum) that is currently under development as a nuclear fuel was
studied for the purpose of developing an improved machine learning approach to
image re... | 2007.13417v1 |
2020-07-27 | 3DMaterialGAN: Learning 3D Shape Representation from Latent Space for Materials Science Applications | In the field of computer vision, unsupervised learning for 2D object
generation has advanced rapidly in the past few years. However, 3D object
generation has not garnered the same attention or success as its predecessor.
To facilitate novel progress at the intersection of computer vision and
materials science, we propo... | 2007.13887v1 |
2020-07-28 | Defect Induced Room Temperature Ferromagnetism in High Quality Co-doped ZnO Bulk Samples | The nature of the often reported room temperature ferromagnetism in
transition metal doped oxides is still a matter of huge debate. Herein we
report on room temperature ferromagnetism in high quality Co-doped ZnO
(Zn1-xCoxO) bulk samples synthesized via standard solid-state reaction route.
Reference paramagnetic Co-dop... | 2007.14140v1 |
2020-07-29 | Theory of Crystallization versus Vitrification | The competition between crystallization and vitrification in glass-forming
materials manifests as a non-monotonic behavior in the time-temperature
transformation (TTT) diagrams, which quantify the time scales for
crystallization as a function of temperature. We develop a coarse-grained
lattice model, the Arrow-Potts mo... | 2007.14968v1 |
2020-09-04 | Efficient Anharmonic Lattice Dynamics Calculations of Thermal Transport in Crystalline and Disordered Solids | Understanding heat transport in semiconductors and insulators is of
fundamental importance because of its technological impact in electronics and
renewable energy harvesting and conversion. Anharmonic Lattice Dynamics
provides a powerful framework for the description of heat transport at the
nanoscale. One of the advan... | 2009.01967v1 |
2020-09-10 | Direct prediction of phonon density of states with Euclidean neural networks | Machine learning has demonstrated great power in materials design, discovery,
and property prediction. However, despite the success of machine learning in
predicting discrete properties, challenges remain for continuous property
prediction. The challenge is aggravated in crystalline solids due to
crystallographic symme... | 2009.05163v2 |
2020-09-11 | Development of data-driven spd tight-binding models of Fe -- parameterisation based on QSGW and DFT calculations including information about higher-order elastic constants | Quantum-mechanical (QM) simulations, thanks to their predictive power, can
provide significant insights into the nature and dynamics of defects such as
vacancies, dislocations and grain boundaries. These considerations are
essential in the context of the development of reliable, inexpensive and
environmentally friendly... | 2009.05419v1 |
2020-09-14 | Visualization of the strain-induced topological phase transition in a quasi-one-dimensional superconductor TaSe3 | Control of the phase transition from topological to normal insulators can
allow for an on/off switching of spin current. While topological phase
transitions have been realized by elemental substitution in semiconducting
alloys, such an approach requires the preparation of materials with various
compositions, thus it is... | 2009.06353v2 |
2020-09-14 | Suppression of Superconductivity and Nematic Order in Fe$_{1-y}$Se$_{1-x}$S$_x$ (0$\leq$$x$$\leq$1, $y$$\leq$0.1) Crystals by Anion Height Disorder | Connections between crystal chemistry and critical temperature $T_c$ have
been in the focus of superconductivity, one of the most widely studied
phenomena in physics, chemistry and materials science alike. In most Fe-based
superconductors, materials chemistry and physics conspire so that $T_c$
correlates with the avera... | 2009.06623v2 |
2020-09-15 | Suppression of acoustic emission during superelastic tensile cycling of polycrystalline Ni$_{50.4}$Ti$_{49.6}$ | We investigate acoustic emission (AE) that arises during the martensitic
transition in a polycrystalline specimen of the prototypical
superelastic/elastocaloric alloy Ni$_{50.4}$Ti$_{49.6}$ (at. %) driven using
tensile strain. We use two independent AE sensors in order to locate AE events,
and focus on contributions to... | 2009.06973v1 |
2020-09-16 | Correlative Synchrotron X-ray Imaging and Diffraction of Directed Energy Deposition Additive Manufacturing | The governing mechanistic behaviour of Directed Energy Deposition Additive
Manufacturing (DED-AM) is revealed by a combined in situ and operando
synchrotron X-ray imaging and diffraction study of a nickel-base superalloy,
IN718. Using a unique process replicator, real-space phase-contrast imaging
enables quantification... | 2009.07930v1 |
2020-09-17 | Electron ground state $g$ factor in embedded InGaAs quantum dots: An atomistic study | We present atomistic computations within an empirical pseudopotential
framework for the electron $s$-shell ground state $g$ tensor of InGaAs quantum
dots (QDs) embedded to host matrices that grant electronic confinement. A large
structural set consisting of geometry, size, and molar fraction variations is
worked out wh... | 2009.08055v2 |
2020-09-24 | The influence of surface deformation on thermocapillary flow instabilities in low Prandtl melting pools with surfactants | Heat and fluid flow in low Prandtl number melting pools during laser
processing of materials are sensitive to the prescribed boundary conditions,
and the responses are highly nonlinear. Previous studies have shown that fluid
flow in melt pools with surfactants can be unstable at high Marangoni numbers.
In numerical sim... | 2009.11700v1 |
2020-09-25 | Performance-based screening of porous materials for carbon capture | Computational screening methods have been accelerating discovery of new
materials and deployment of technologies based on them in many areas from
batteries and alloys to photovoltaics and separation processes. In this review,
we focus on post-combustion carbon capture using adsorption in porous
materials. Prompted by u... | 2009.12289v2 |
2020-09-25 | Non-thermal transport of energy driven by photoexcited carriers in switchable solid states of GeTe | Phase change alloys have seen widespread use from rewritable optical discs to
the present day interest in their use in emerging neuromorphic computing
architectures. In spite of this enormous commercial interest, the physics of
carriers in these materials is still not fully understood. Here, we describe
the time and sp... | 2009.12302v1 |
2020-09-28 | Nanoscale transient magnetization gratings excited and probed by femtosecond extreme ultraviolet pulses | We utilize coherent femtosecond extreme ultraviolet (EUV) pulses derived from
a free electron laser (FEL) to generate transient periodic magnetization
patterns with periods as short as 44 nm. Combining spatially periodic
excitation with resonant probing at the dichroic M-edge of cobalt allows us to
create and probe tra... | 2009.13330v1 |
2020-09-28 | Thermodynamic driving force in the formation of hexagonal-diamond Si and Ge nanowires | The metastable hexagonal-diamond phase of Si and Ge (and of SiGe alloys)
displays superior optical properties with respect to the cubic-diamond one. The
latter is the most stable and popular one: growing hexagonal-diamond Si or Ge
without working at extreme conditions proved not to be trivial. Recently,
however, the po... | 2009.13630v1 |
2020-09-30 | Effects of Reducing Heat Treatment on the Structural and the Magnetic Properties of Mn:ZnO Ceramics | Polycrystalline bulk Mn:ZnO ceramics with Mn nominal concentrations of 6, 11,
17 and 22 at.% were prepared trough solid-state reaction method and subjected
to a heat treatment in reducing atmosphere (Ar (95%) and H2 (5%)). The samples
were studied with particular emphasis on their compositions, structural, and
magnetic... | 2009.14778v1 |
2020-10-07 | Electrical properties of SmB$_6$ thin films prepared by pulsed laser deposition from a stoichiometric SmB$_6$ target | Possible existence of topologically protected surface in samarium hexaboride
has created a strong need for investigations allowing to distinguish between
properties coming from the surface states and those originating in the
(remaining) bulk. Studies of SmB6 thin films represent a favorable approach
allowing well defin... | 2010.03400v1 |
2020-10-07 | High-throughput techniques for measuring the spin Hall effect | The spin Hall effect in heavy-metal thin films is routinely employed to
convert charge currents into transverse spin currents and can be used to exert
torque on adjacent ferromagnets. Conversely, the inverse spin Hall effect is
frequently used to detect spin currents by charge currents in spintronic
devices up to the t... | 2010.03543v1 |
2020-10-12 | Understanding photoluminescence in semiconductor Bragg-reflection waveguides: Towards an integrated, GHz-rate telecom photon pair source | Compared to traditional nonlinear optical crystals, like BaB$_2$O$_4$,
KTiOPO$_4$ or LiNbO$_3$, semiconductor integrated sources of photon pairs may
operate at pump wavelengths much closer to the bandgap of the materials. This
is also the case for Bragg-reflection waveguides (BRW) targeting parametric
down-conversion (... | 2010.05474v1 |
2020-10-12 | Laser Assisted Solution Synthesis of High Performance Graphene Supported Electrocatalysts | Simple, yet versatile, methods to functionalize graphene flakes with metal
(oxide) nanoparticles are in demand, particularly for the development of
advanced catalysts. Herein, based on light-induced electrochemistry, a
laser-assisted, continuous, solution route for the simultaneous reduction and
modification of graphen... | 2010.05556v1 |
2020-10-13 | Reaching room temperature superconductivity by optimizing doping in LaH$_{10}$? | Intuitively, doping represents one of the most promising avenues for
optimization of best prospect superconductors (SC) such as conventional
high-pressure SCs with record critical temperatures. However, doping at high
pressure (HP) is very challenging, and there is not a proved route to achieve
it in a controlled fashi... | 2010.06446v1 |
2020-10-14 | Origin of phase stability in Fe with long-period stacking order as an intermediate phase in cyclic $γ$-$ε$ martensitic transformation | A class of Fe-Mn-Si-based alloys exhibits a reversible martensitic
transformation between the $\gamma$ phase with a face-centered cubic~(fcc)
structure and an $\epsilon$ phase with a hexagonal close-packed (hcp)
structure. During the deformation-induced $\gamma$--$\epsilon$ transformation,
we identified a phase that is... | 2010.07118v4 |
2020-10-16 | Investigation of n-type dilute magnetic semiconductor property observed in amorphous AlNO alloy thin film incorporated with dilute nitrogen at 300K | In the present work, a thin film was deposited on quartz substrate by
reactive RF magnetron sputtering of high purity (99.999%) aluminium target
using ultra-high pure (Ar + N2) gas mixture. The percentage ratio of Ar and N2
in the gas mixture was 95% and 5%, respectively. Chemical characterization
using x-ray photoelec... | 2010.08361v1 |
2020-10-23 | Air-stable, earth-abundant molten chlorides and corrosion-resistant containment for chemically-robust, high-temperature thermal energy storage for concentrated solar power | A dramatic reduction in man-made CO2 emissions could be achieved if the cost
of electricity generated from concentrated solar power (CSP) plants could
become competitive with fossil-fuel-derived electricity. The solar
heat-to-electricity conversion efficiency of CSP plants may be significantly
increased (and the associ... | 2010.12476v1 |
2020-10-28 | Statistical analysis of the material, geometrical and imperfection characteristics of structural stainless steels and members | Traditional member-based two-step design approaches included in current
structural codes for steel structures, as well as more recent system-based
direct-design alternatives, require building rigorous structural reliability
frameworks for the calibration of partial coefficients (resistance factors) to
achieve specified... | 2010.14777v2 |
2020-11-04 | Spin reorientations and crystal field modification in Ho$_{1-y}$Gd$_y$Al$_2$ compounds | We have performed an experimental and theoretical investigation on the spin
reorientation transitions Ho$_{1-y}$Gd$_y$Al$_2$ compounds. Crystallographic,
magnetic and calorimetric measurements have been performed for five selected
samples in the Ho$_{1-y}$Gd$_y$Al$_2$ series ($y$ = 0, 0.25, 0.5, 0.75 and
1.0). From the... | 2011.02571v1 |
2020-11-10 | Inter-diffusion, melting and reaction interplay in Ni/4H-SiC under excimer laser annealing | We investigated the complex interaction between a nickel layer and a 4H-SiC
substrate under UV-laser irradiation since the early stages of the atomic
inter-diffusion. An exhaustive description is still lacking in the literature.
A multimethod approach based on Transmission Electron Microscopy, Energy
Dispersive Spectro... | 2011.05159v1 |
2020-11-18 | Structure of graphene and a surface carbide grown on the (0001) surface of rhenium | Transition metal surfaces catalyse a broad range of thermally-activated
reactions involving carbon-containing-species -- from atomic carbon to small
hydrocarbons or organic molecules, and polymers. These reactions yield
well-separated phases, for instance graphene and the metal surface, or, on the
contrary, alloyed pha... | 2011.09171v1 |
2020-11-18 | Optical and electronic properties of symmetric InAs/InGaAlAs/InP quantum dots formed by a ripening process in molecular beam epitaxy: a promising system for broad-range single-photon telecom emitters | We present a detailed experimental optical study supported by theoretical
modeling of InAs quantum dots (QDs) embedded in an InAlGaAs barrier
lattice-matched to InP(001) grown with the use of a ripening step in molecular
beam epitaxy. The method leads to the growth of in-plane symmetric QDs of low
surface density, char... | 2011.09198v1 |
2020-11-19 | Marangoni Fingering Instabilities in Oxidizing Liquid Metals | Eutectic gallium-indium (EGaIn), a room-temperature liquid metal alloy, has
the largest tension of any liquid at room temperature, and yet can nonetheless
undergo fingering instabilities. This effect arises because, under an applied
voltage, oxides deposit on the surface of the metal, which leads to a lowering
of the i... | 2011.10016v1 |
2020-11-19 | An in-situ synchrotron diffraction study of stress relaxation in titanium: Effect of temperature and oxygen on cold dwell fatigue | There is a long-standing technological problem in which a stress dwell during
cyclic loading at room temperature in Ti causes a significant fatigue life
reduction. It is thought that localised time dependent plasticity in soft
grains favourably oriented for easy plastic slip leads to load shedding and an
increase in st... | 2011.10041v1 |
2020-11-22 | Micro-cracking, microstructure and mechanical properties of Hastelloy-X alloy printed by laser powder bed fusion: as-built, annealed and hot-isostatic pressed | This study analyses literature data to identify optimised print parameters
and assesses the consolidation, microstructure, and mechanical properties of
Hastelloy-X printed by laser powder bed fusion. Effects of post annealing and
hot-isostatic pressing (HIP) on the microstructure and mechanical properties
are also reve... | 2011.11003v1 |
2020-11-30 | Chiral topological superconducting state with Chern number $\mathcal{C} =-2$ in Pb$_3$Bi/Ge(111) | Materials realization of chiral topological superconductivity is a crucial
condition for observing and manipulating Majorana fermions in condensed matter
physics. Here we develop a tight-binding description of Pb$_3$Bi/Ge(111),
identified recently as an appealing candidate system for realizing chiral
$p$-wave topologic... | 2011.14727v2 |
2020-12-10 | Synergistic effect of shear and ADP on platelet growth on ZTA and Ti6Al4V surfaces | Continuous-flow ventricular assist devices (VADs) have been an increasingly
common, life-saving therapy for advanced heart-failure patients, but elevate
the risk of thrombosis due to a combination of non-physiological hemodynamics
and synthetic biomaterials. Limited work has been done to address platelet
adhesion and a... | 2012.05827v2 |
2020-12-11 | MICROSCOPE mission analysis, requirements and expected performance | The MICROSCOPE mission aimed to test the Weak Equivalence Principle (WEP) to
a precision of $10^{-15}$. The WEP states that two bodies fall at the same rate
on a gravitational field independently of their mass or composition. In
MICROSCOPE, two masses of different compositions (titanium and platinum alloys)
are placed ... | 2012.06472v2 |
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