publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
|---|---|---|---|
2023-12-07 | Energy dissipation in astrophysical simulations: results of the Orszag-Tang test problem | The magnetic field through the magnetic reconnection process affects the
dynamics and structure of astrophysical systems. Numerical simulations are the
tools to study the evolution of these systems. However, the resolution,
dimensions, resistivity, and turbulence of the system are some important
parameters to take into... | 2312.06675v1 |
2024-01-10 | Some aspects of resistive-to-normal state transition by direct and microwave currents in superconducting thin films with phase slip lines | Based on analysis of current-voltage characteristics and imaging of the
resistive state of thin-film tin strips using the low-temperature laser
scanning microscopy (LTLSM), the process of destruction of superconductivity by
current and microwave irradiation with the formation and spatial rearrangement
of the order para... | 2401.05333v1 |
2024-02-24 | A simple model of globally magnetized accretion discs | We present an analytic, quasi-local dynamo model for accretion discs threaded
by net, vertical magnetic flux. In a simple slab geometry and ignoring
stochastic mean-field dynamo effects, we calculate the large-scale field
resulting from the balance between kinematic field amplification and turbulent
resistive diffusion... | 2402.15657v1 |
2024-02-28 | Stability studies of sealed Resistive Plate Chambers | The phase-out of hydro-fluorocarbons, owing to their high Global Warming
Power, affecting the main gas used in Resistive Plate Chambers (RPCs),
tetrafluoroethane C$_2$H$_2$F$_4$, has increased operational difficulties on
existing systems and imposes strong restrictions on its use in new systems.
This has motivated a ... | 2402.18663v1 |
2024-03-06 | Foot Shape-Dependent Resistive Force Model for Bipedal Walkers on Granular Terrains | Legged robots have demonstrated high efficiency and effectiveness in
unstructured and dynamic environments. However, it is still challenging for
legged robots to achieve rapid and efficient locomotion on deformable, yielding
substrates, such as granular terrains. We present an enhanced resistive force
model for bipedal... | 2403.03460v1 |
2024-03-13 | Lithographically Defined Zerogap Strain Sensors | Metal thin films on soft polymers provide a unique opportunity for
resistance-based strain sensors. A mechanical mismatch between the conductive
film and the flexible substrate causes cracks to open and close, changing the
electrical resistance as a function of strain. However, the very randomness of
the formation, sha... | 2403.08288v1 |
2024-03-19 | Revisiting shear stress tensor evolution: Non-resistive magnetohydrodynamics with momentum-dependent relaxation time | This study aims to develop second-order relativistic viscous
magnetohydrodynamics (MHD) derived from kinetic theory within an extended
relaxation time approximation (momentum/energy dependent) for the collision
kernel. The investigation involves a detailed examination of shear stress
tensor evolution equations and asso... | 2403.13160v2 |
2024-03-20 | Experience gained about Resistive Plate Chambers ageing from the ALICE Muon TRigger/IDentifier detector | The ALICE Muon IDentifier is composed of 72 single-gap bakelite Resistive
Plate Chambers, which have been operational since 2009 in maxi-avalanche mode
(discrimination threshold:7 mV without amplification) with a
Tetrafluoroethane/Isobutane/Sulfur Hexafluoride gas mixture, undergoing
counting rates of the order of tens... | 2403.13618v1 |
2024-03-25 | Improving Diffusion Models's Data-Corruption Resistance using Scheduled Pseudo-Huber Loss | Diffusion models are known to be vulnerable to outliers in training data. In
this paper we study an alternative diffusion loss function, which can preserve
the high quality of generated data like the original squared $L_{2}$ loss while
at the same time being robust to outliers. We propose to use pseudo-Huber loss
funct... | 2403.16728v1 |
2024-04-01 | Giant and negative magnetoresistances in conical magnets | We study magnetotransport in conical helimagnet crystals. Spin dependent
magnetoresistance exhibits dramatic properties for high and low electron
concentrations at different temperatures. For spin up electrons we find
negative magnetoresistance despite only considering a single carrier type. For
spin down electrons we ... | 2404.01401v1 |
2024-04-02 | Integer and fractional quantum anomalous Hall effects in pentalayer graphene | We critically analyze the recently reported observation of integer (IQAHE)
and fractional (FQAHE) quantum anomalous Hall effects at zero applied magnetic
field in pentalayer graphene. Our quantitative activation and variable range
hopping transport analysis of the experimental data reveals that the observed
IQAHE and F... | 2404.02192v1 |
2024-05-06 | Polynomial lower bound on the effective resistance for the one-dimensional critical long-range percolation | In this work, we study the critical long-range percolation on $\mathbb{Z}$,
where an edge connects $i$ and $j$ independently with probability
$1-\exp\{-\beta |i-j|^{-2}\}$ for some fixed $\beta>0$. Viewing this as a
random electric network where each edge has a unit conductance, we show that
with high probability the e... | 2405.03460v1 |
2018-09-07 | Mapping the depleted area of silicon diodes using a micro-focused X-ray beam | For the Phase-II Upgrade of the ATLAS detector at CERN, the current ATLAS
Inner Detector will be replaced with the ATLAS Inner Tracker. The ATLAS Inner
Tracker will be an all-silicon detector, consisting of a pixel tracker and a
strip tracker. Sensors for the ITk strip tracker are required to have a low
leakage current... | 1809.02667v2 |
2020-02-28 | Accelerating and Stopping Resistance Drift in Phase Change Memory Cells via High Electric Field Stress | We observed resistance drift in 125 K - 300 K temperature range in melt
quenched amorphous Ge2Sb2Te5 line-cells with length x width x thickness = ~500
nm x ~100 nm x ~ 50 nm. Drift coefficients measured using small voltage sweeps
appear to decrease from 0.12 +/- 0.029 at 300 K to 0.075 +/- 0.006 at 125 K.
The current-v... | 2002.12487v1 |
2021-10-18 | Negative differential resistance state in the free-flux-flow regime of driven vortices in a single crystal of 2H-NbS$_2$ | Time series measurements in 2H-NbS$_2$ crystal had unravelled a drive induced
transition wherein the critical current (Ic) changes from a low to a high Ic
jammed vortex state, via a negative differential resistance (NDR) transition.
Here, using multiple current (I) - voltage (V) measurement cycles, we explore
the stati... | 2110.09379v2 |
2020-11-28 | Development of polar nematic fluids with giant-\k{appa} dielectric properties | Super-high-\k{appa} materials that exhibit exceptionally high dielectric
permittivity are recognized as potential candidates for a wide range of
next-generation photonic and electronic devices. Generally, the high
dielectricity for achieving a high-\k{appa} state requires a low symmetry of
materials so that most of the... | 2011.14099v1 |
2019-02-26 | The Evidence of Cathodic Micro-discharges during Plasma Electrolytic Oxidation Process | Plasma electrolytic oxidation (PEO) processing of EV 31 magnesium alloy has
been carried out in fluoride containing electrolyte under bipolar pulse current
regime. Unusual PEO cathodic micro-discharges have been observed and
investigated. It is shown that the cathodic micro-discharges exhibit a
collective intermittent ... | 1902.09828v1 |
2019-07-05 | Materials databases: the need for open, interoperable databases with standardized data and rich metadata | Driven by the recent rapid increase in the number of materials databases
published (open and commercial), I discuss here some perspectives on the
growing need for standardized, interoperable, open databases. The field of
computational materials discovery is quickly expanding, and recent advances in
data mining, high th... | 1907.02791v1 |
2016-01-07 | First principles search for $n$-type oxide, nitride, and sulfide thermoelectrics | Oxides have many potentially desirable characteristics for thermoelectric
applications, including low cost and stability at high temperatures, but thus
far there are few known high $zT$ $n$-type oxide thermoelectrics. In this work,
we use high-throughput first principles calculations to screen transition metal
oxides, ... | 1601.01622v2 |
2014-09-03 | Mechanics of freely-suspended ultrathin layered materials | The study of atomically thin two-dimensional materials is a young and rapidly
growing field. In the past years, a great advance in the study of the
remarkable electrical and optical properties of 2D materials fabricated by
exfoliation of bulk layered materials has been achieved. Due to the
extraordinary mechanical prop... | 1409.1173v2 |
2015-01-18 | Ultra-high mechanical stretchability and controllable topological phase transitions in two-dimensional arsenic | The mechanical stretchability is the magnitude of strain which a material can
suffer before it breaks. Materials with high mechanical stretchability, which
can reversibly withstand extreme mechanical deformation and cover arbitrary
surfaces and movable parts, are used for stretchable display devices, broadband
photonic... | 1501.04350v1 |
2022-04-02 | Inventory of high-quality flat-band van der Waals materials | More is left to do in the field of flat bands besides proposing theoretical
models. One unexplored area is the flat bands featured in the van der Waals
(vdW) materials. Exploring more flat-band material candidates and moving the
promising materials toward applications have been well recognized as the
cornerstones for t... | 2204.00810v1 |
2017-02-25 | Electronic conduction properties of indium tin oxide: single-particle and many-body transport | Indium tin oxide (Sn-doped In$_2$O$_{3-\delta}$ or ITO) is an interesting and
technologically important transparent conducting oxide. This class of material
has been extensively studied for decades, with research efforts focusing on the
application aspects. The fundamental issues of the electronic conduction
properties... | 1702.07845v1 |
2018-06-11 | Coincident Molecular Auxeticity and Negative Order Parameter in a Liquid Crystal Elastomer | "Auxetic" materials have the counter-intuitive property of expanding rather
than contracting perpendicular to an applied stretch, formally they have
negative Poisson's Ratios (PRs).[1,2] This results in properties such as
enhanced energy absorption and indentation resistance, which means that
auxetics have potential fo... | 1807.03608v1 |
2022-05-11 | Effect of magnetic phase coexistence on spin-phonon coupling and magnetoelectric effect in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3 | The polycrystalline co-doped samples of Sm0.5Y0.5Fe0.58Mn0.42O3 were prepared
by solid-state reaction route and its various physical properties with their
correlations have been investigated. The dc magnetization measurements on the
sample revealed a weak ferromagnetic (WFM) transition at TN=361 K that is
followed by a... | 2205.05291v2 |
2023-08-18 | Magnon Diffusion Length and Longitudinal Spin Seebeck Effect in Vanadium Tetracyanoethylene (V[TCNE]$_x$, $x \sim 2$) | Spintronic, spin caloritronic, and magnonic phenomena arise from complex
interactions between charge, spin, and structural degrees of freedom that are
challenging to model and even more difficult to predict. This situation is
compounded by the relative scarcity of magnetically-ordered materials with
relevant functional... | 2308.09752v1 |
1998-08-25 | Unconventional Transition from Metallic to Insulating Resistivity in the Spin-ladder Compound (Sr,Ca)$_{14}$Cu$_{24}$O$_{41}$ | Spin-ladder compounds make interesting analogs of the high-temperature
superconductors, because they contain layers of nearly one-dimensional
"ladders" consisting of a square array of copper and oxygen atoms. Increasing
the number of legs in the ladders provides a step-wise approach toward the
two-dimensional copper-ox... | 9808284v2 |
2000-02-17 | Effect of Magnetic field on the Pseudogap Phenomena in High-Tc Cuprates | We theoretically investigate the effect of magnetic field on the pseudogap
phenomena in High-Tc cuprates.
The obtained results well explain the experimental results including their
doping dependences.
In our previous paper (J. Phys. Soc. Jpn. 68 (1999) 2999.), we have shown
that the pseudogap phenomena observed in ... | 0002274v1 |
2018-11-15 | High Kinetic Inductance Microwave Resonators Made by He-Beam Assisted Deposition of Tungsten Nanowires | We evaluate the performance of hybrid microwave resonators made by combining
sputtered Nb thin films with Tungsten nanowires grown with a He-beam induced
deposition technique. Depending on growth conditions the nanowires have a
typical width $w\in[35-75]$~nm and thickness $t\in[5-40]$~nm. We observe a high
normal state... | 1811.06496v2 |
2017-05-16 | Scale-invariant magnetoresistance in a cuprate superconductor | The anomalous metallic state in high-temperature superconducting cuprates is
masked by the onset of superconductivity near a quantum critical point. Use of
high magnetic fields to suppress superconductivity has enabled a detailed study
of the ground state in these systems. Yet, the direct effect of strong magnetic
fiel... | 1705.05806v2 |
2022-11-22 | Development of ultra-low mass and high-rate capable RPC based on Diamond-Like Carbon electrodes for MEG II experiment | A new type of resistive plate chamber with thin-film electrodes based on
diamond-like carbon is under development for background identification in the
MEG II experiment. Installed in a low-momentum and high-intensity muon beam,
the detector is required to have extremely low mass and a high rate capability.
A single-lay... | 2211.12172v2 |
2010-05-05 | Review of Best Practice Methods for Determining an Electrode Material's Performance for Ultracapacitors | Ultracapacitors are rapidly being adopted for use for a wide range of
electrical energy storage applications. While ultracapacitors are able to
deliver high rates of charge and discharge, they are limited in the amount of
energy stored. The capacity of ultracapacitors is largely determined by the
electrode material and... | 1005.0805v2 |
2016-07-22 | How to Characterize Thermal Transport Capability of 2D Materials Fairly? - Sheet Thermal Conductance and the Choice of Thickness | Ever since the discovery of the record-high thermal conductivity of single
layer graphene, thermal transport capability of monolayer 2D materials has been
under constant spotlight. Since thermal conductivity is an intensive property
for 3D materials and the thickness of 2D materials is not well defined,
different defin... | 1607.06542v2 |
2018-02-05 | Plasmonic physics of 2D crystalline materials | Collective modes of doped two-dimensional crystalline materials, namely
graphene, MoS$_2$ and phosphorene, both monolayer and bilayer structures, are
explored using the density functional theory simulations together with the
random phase approximation. The many-body dielectric functions of the materials
are calculated ... | 1802.01291v1 |
2018-07-01 | Correlated materials design: prospects and challenges | The design of correlated materials challenges researchers to combine the
maturing, high throughput framework of DFT-based materials design with the
rapidly-developing first-principles theory for correlated electron systems. We
review the field of correlated materials, distinguishing two broad classes of
correlation eff... | 1807.00398v2 |
2020-05-09 | Learning Properties of Ordered and Disordered Materials from Multi-fidelity Data | Predicting the properties of a material from the arrangement of its atoms is
a fundamental goal in materials science. While machine learning has emerged in
recent years as a new paradigm to provide rapid predictions of materials
properties, their practical utility is limited by the scarcity of high-fidelity
data. Here,... | 2005.04338v3 |
2020-08-24 | Inverse Design of Composite Metal Oxide Optical Materials based on Deep Transfer Learning | Optical materials with special optical properties are widely used in a broad
span of technologies, from computer displays to solar energy utilization
leading to large dataset accumulated from years of extensive materials
synthesis and optical characterization. Previously, machine learning models
have been developed to ... | 2008.10618v1 |
2022-04-04 | Hole-doping induced ferromagnetism in 2D materials | Two-dimensional (2D) ferromagnetic materials are considered as promising
candidates for the future generations of spintronic devices. Yet, 2D materials
with intrinsic ferromagnetism are scarce. High-throughput first-principles
simulations are performed in order to screen 2D materials that present a
non-magnetic to a fe... | 2204.01551v2 |
2023-03-29 | A Comprehensive and Versatile Multimodal Deep Learning Approach for Predicting Diverse Properties of Advanced Materials | We present a multimodal deep learning (MDL) framework for predicting physical
properties of a 10-dimensional acrylic polymer composite material by merging
physical attributes and chemical data. Our MDL model comprises four modules,
including three generative deep learning models for material structure
characterization ... | 2303.16412v1 |
2024-04-03 | Construction of Functional Materials Knowledge Graph in Multidisciplinary Materials Science via Large Language Model | The convergence of materials science and artificial intelligence has unlocked
new opportunities for gathering, analyzing, and generating novel materials
sourced from extensive scientific literature. Despite the potential benefits,
persistent challenges such as manual annotation, precise extraction, and
traceability iss... | 2404.03080v1 |
2024-04-09 | Deep-Learning Database of Density Functional Theory Hamiltonians for Twisted Materials | Moir\'e-twisted materials have garnered significant research interest due to
their distinctive properties and intriguing physics. However, conducting
first-principles studies on such materials faces challenges, notably the
formidable computational cost associated with simulating ultra-large twisted
structures. This obs... | 2404.06449v1 |
2020-03-15 | New quantum phases of matter: Topological Materials | In this article, we provide an overview of the basic concepts of novel
topological materials. This new class of materials developed by combining the
Weyl/Dirac fermionic electron states and magnetism, provide a materials-science
platform to test predictions of the laws of topological physics. Owing to their
dissipation... | 2003.06835v1 |
2019-06-11 | Towards Photoferroic Materials by Design: Recent Progresses and Perspective | The use of photoferroic materials that combine ferroelectric and light
harvesting properties in a photovoltaic device is a promising route to
significantly improve the efficiency of solar cells. These materials do not
require the formation of a p-n junction and can produce photovoltages well
above the value of the band... | 1906.04490v1 |
2023-11-06 | Cross-Plane Thermal Transport in Layered Materials | The cross-plane (across-layers) phonon thermal transport of five diverse,
layered semiconductors is investigated by accounting for higher-order
four-phonon scattering, phonon renormalization, and multi-channel thermal
transport. For materials having relatively large cross-plane thermal
conductivity (AlB6, MoS2, and MoS... | 2311.03144v1 |
2024-03-15 | MADAS -- A Python framework for assessing similarity in materials-science data | Computational materials science produces large quantities of data, both in
terms of high-throughput calculations and individual studies. Extracting
knowledge from this large and heterogeneous pool of data is challenging due to
the wide variety of computational methods and approximations, resulting in
significant veraci... | 2403.10470v1 |
2017-02-18 | Tunable Hyperbolic Dispersion and Negative Refraction in Natural Electride Materials | Hyperbolic (or indefinite) materials have attracted significant attention due
to their unique capabilities for engineering electromagnetic space and
controlling light propagation. A current challenge is to find a hyperbolic
material with wide working frequency window, low energy loss, and easy
controllability. Here, we... | 1702.05602v1 |
2018-04-23 | Gaussian Material Synthesis | We present a learning-based system for rapid mass-scale material synthesis
that is useful for novice and expert users alike. The user preferences are
learned via Gaussian Process Regression and can be easily sampled for new
recommendations. Typically, each recommendation takes 40-60 seconds to render
with global illumi... | 1804.08369v1 |
2022-02-10 | Topogivity: A Machine-Learned Chemical Rule for Discovering Topological Materials | Topological materials present unconventional electronic properties that make
them attractive for both basic science and next-generation technological
applications. The majority of currently known topological materials have been
discovered using methods that involve symmetry-based analysis of the quantum
wavefunction. H... | 2202.05255v3 |
2021-09-11 | Highly Accurate, Reliable and Non-Contaminating Two-Dimensional Material Transfer System | The exotic properties of two-dimensional (2D) materials and 2D
heterostructures, built by forming heterogeneous multi-layered stacks, have
been widely explored across a number of subject matters following the goal to
invent, design, and improve applications enabled by 2D materials. To
successfully harvest these unique ... | 2109.05158v2 |
2021-11-10 | Piezoelectric modulus prediction using machine learning and graph neural networks | Piezoelectric materials are widely used in all kinds of industries such as
electric cigarette lighters, diesel engines and x-ray shutters. However,
discovering high-performance and environmentally friendly (e.g. lead-free)
piezoelectric materials is a difficult problem due to the sophisticated
relationships from materi... | 2111.05557v1 |
2023-06-25 | Discovering two-dimensional magnetic topological insulators by machine learning | Topological materials with unconventional electronic properties have been
investigated intensively for both fundamental and practical interests.
Thousands of topological materials have been identified by symmetry-based
analysis and ab initio calculations. However, the predicted magnetic
topological insulators with genu... | 2306.14155v2 |
2023-10-21 | Advances in Complex Oxide Quantum Materials Through New Approaches to Molecular Beam Epitaxy | Molecular beam epitaxy (MBE), a workhorse of the semiconductor industry, has
progressed rapidly in the last few decades in the development of novel
materials. Recent developments in condensed matter and materials physics have
seen the rise of many novel quantum materials that require ultra-clean and
high-quality sample... | 2310.13902v1 |
2002-05-31 | Structure and Superconductivity in Zr-Stabilized, Nonstoichiometric Molybdenum Diboride | The structure and physical properties of the Zr-stabilized, nonstoichiometric
molybdenum diboride superconductor are reported. Good quality material of the
diboride structure type can only be obtained by partial substitution of Zr for
Mo, and the quenching of melts. The phase is best made with boron in excess of
the id... | 0206006v1 |
2003-07-31 | The break up of heavy electrons at a quantum critical point | The point at absolute zero where matter becomes unstable to new forms of
order is called a quantum critical point (QCP). The quantum fluctuations
between order and disorder that develop at this point induce profound
transformations in the finite temperature electronic properties of the
material. Magnetic fields are ide... | 0308001v1 |
2006-06-16 | Multiferroic tunnel junctions | Multiferroics are singular materials that can display simultaneously electric
and magnetic orders. Some of them can be ferroelectric and ferromagnetic and,
for example, provide the unique opportunity of encoding information
independently in electric polarization and magnetization to obtain four
different logic states. ... | 0606444v1 |
2006-10-29 | Detection of Individual Gas Molecules Absorbed on Graphene | The ultimate aspiration of any detection method is to achieve such a level of
sensitivity that individual quanta of a measured value can be resolved. In the
case of chemical sensors, the quantum is one atom or molecule. Such resolution
has so far been beyond the reach of any detection technique, including
solid-state g... | 0610809v2 |
2007-11-26 | Experimental investigation on the microscopic structure of intrinsic paramagnetic point defects in amorphous silicon dioxide | In the present Ph.D. Thesis we report an experimental investigation on the
effects of gamma- and beta-ray irradiation and of subsequent thermal treatment
on many types of a-SiO2 materials, differing in the production methods, OH- and
Al-content, and oxygen deficiencies. Our main objective is to gain further
insight on ... | 0711.4029v1 |
2011-06-16 | The Memory-Conservation Theory of Memristance | The memristor, the recently discovered fundamental circuit element, is of
great interest for neuromorphic computing, nonlinear electronics and computer
memory. It is usually modelled either using Chua's equations, which lack
material device properties, or using Strukov's phenomenological model (or
models derived from i... | 1106.3170v3 |
2012-04-18 | Controlling bulk conductivity in topological insulators: Key role of anti-site defects | The binary Bi-chalchogenides, Bi2Ch3, are widely regarded as model examples
of a recently discovered new form of quantum matter, the three-dimensional
topological insulator (TI) [1-4]. These compounds host a single spin-helical
surface state which is guaranteed to be metallic due to time reversal symmetry,
and should b... | 1204.4063v1 |
2013-09-12 | Theoretical Field Limits for Multi-Layer Superconductors | The SIS structure---a thin superconducting film on a bulk superconductor
separated by a thin insulating film---was propsed as a method to protect
alternative SRF materials from flux penetration by enhancing the first critical
field $B_{c1}$. In this work, we show that in fact $B_{c1}$ = 0 for a SIS
structure. We calcul... | 1309.3239v2 |
2014-07-08 | Competing magnetic phases and field-induced dynamics in DyRuAsO | Analysis of neutron diffraction, dc magnetization, ac magnetic
susceptibility, heat capacity, and electrical resistivity for DyRuAsO in an
applied magnetic field are presented at temperatures near and below those at
which the structural distortion (T_S = 25 K) and subsequent magnetic ordering
(T_N = 10.5 K) take place.... | 1407.2184v1 |
2014-07-13 | Gate-tunable Phase Transitions in 1T-TaS$_2$ | The ability to tune material properties using gate electric field is at the
heart of modern electronic technology. It is also a driving force behind recent
advances in two-dimensional systems, such as gate-electric-field induced
superconductivity and metal-insulator transition. Here we describe an ionic
field-effect tr... | 1407.3480v1 |
2014-12-16 | Characterization of 3 mm Glass Electrodes and Development of RPC Detectors for $INO-ICAL$ Experiment | India-based Neutrino Observatory (INO) is a multi-institutional facility,
planned to be built up in South India. The INO facility will host a 51 kton
magnetized Iron CALorimeter (ICAL) detector to study atmospheric muon
neutrinos. Iron plates have been chosen as the target material whereas
Resistive Plate Chambers (RPC... | 1412.4998v1 |
2015-12-07 | Insulating phase in Sr$_2$IrO$_4$: An investigation using critical analysis and magnetocaloric effect | The nature of insulating phase in 5$d$ based Sr$_2$IrO$_4$ is quite debated
as the theoretical as well as experimental investigations have put forward
evidences in favor of both magnetically driven Slater-type and interaction
driven Mott-type insulator. To understand this insulating behavior, we have
investigated the n... | 1512.02041v1 |
2016-02-04 | Picosecond electric-field-induced threshold switching in phase-change materials | Many chalcogenide glasses undergo a breakdown in electronic resistance above
a critical field strength. Known as threshold switching, this mechanism enables
field-induced crystallization in emerging phase-change memory. Purely
electronic as well as crystal nucleation assisted models have been employed to
explain the el... | 1602.01885v2 |
2016-10-17 | Structural, magnetic, electric, dielectric, and thermodynamic properties of multiferroic GeV4S8 | The lacunar spinel GeV4S8 undergoes orbital and ferroelectric ordering at the
Jahn-Teller transition around 30 K and exhibits antiferromagnetic order below
about 14 K. In addition to this orbitally driven ferroelectricity, lacunar
spinels are an interesting material class, as the vanadium ions form V4
clusters represen... | 1610.05244v1 |
2017-02-15 | Negative Differential Resistance in Graphene Boron Nitride Heterostructure Controlled by Twist and Phonon-Scattering | Two-dimensional (2D) crystals, such as graphene, hexagonal boron nitride and
transitional metal dichalcogenides, have attracted tremendous amount of
attention over the past decade due to their extraordinary thermal, electrical
and optical properties, making them promising nano-materials for the
next-generation electron... | 1702.04435v1 |
2017-09-12 | Electric field induced semiconductor-to-metal phase transition in vertical MoTe2 and Mo1-xWxTe2 devices | Over the past years, transition metal dichalcogenides (TMDs) have attracted
attention as potential building blocks for various electronic applications due
to their atomically thin nature. An exciting development is the recent success
in 'engineering' crystal phases of TMD compounds during the growth due to their
polymo... | 1709.03835v1 |
2018-01-05 | Writing on Nanocrystals: Patterning Colloidal Inorganic Nanocrystal Films through Irradiation-Induced Chemical Transformations of Surface Ligands | In the past couple of decades, colloidal inorganic nanocrystals and, more
specifically, semiconductor quantum dots have emerged as crucial materials for
the development of nanoscience and nanotechnology, with applications in very
diverse areas such as optoelectronics and biotechnology. Films made of
inorganic NCs depos... | 1801.01756v1 |
2018-04-09 | Pressure effects on the structural and superconducting transitions in La3Co4Sn13 | La3Co4Sn13 is a superconducting material with transition temperature at Tc =
2.70 K, which presents a superlattice structural transition at T* ~ 150 K, a
common feature for this class of compounds. However, for this material, it is
not clear that at T* the lattice distortions arise from a charge density wave
(CDW) or f... | 1804.03215v2 |
2018-06-14 | Tunneling spin valves based on Fe$_3$GeTe$_2$/hBN/Fe$_3$GeTe$_2$ van der Waals heterostructures | Thin van der Waals (vdW) layered magnetic materials disclose the possibility
to realize vdW heterostructures with new functionalities. Here we report on the
realization and investigation of tunneling spin valves based on van der Waals
heterostructures consisting of an atomically thin hBN layer acting as tunnel
barrier ... | 1806.05411v1 |
2018-06-18 | Mott transition and collective charge pinning in electron doped Sr2IrO4 | We studied the in-plane dynamic and static charge conductivity of electron
doped Sr2IrO4 using optical spectroscopy and DC transport measurements. The
optical conductivity indicates that the pristine material is an indirect
semiconductor with a direct Mott-gap of 0.55 eV. Upon substitution of 2% La per
formula unit the... | 1806.06937v1 |
2018-06-22 | Disorder control in crystalline GeSb2Te4 and its impact on characteristic length scales | Crystalline GeSb2Te4 (GST) is remarkable material, as it allows to
continuously tune the electrical resistance by orders of magnitude without
involving a phase transition or stoichiometric changes, just by altering the
short-range order. While well-ordered specimen are metallic, increasing amounts
of disorder can event... | 1806.08636v1 |
2019-09-26 | Large-area implementation and critical evaluation of the material and fabrication aspects of a thin-film thermoelectric generator based on aluminum-doped zinc oxide | A large-area thermoelectric generator (TEG) utilizing a folded thin-film
concept is implemented and the performance evaluated for near room temperature
applications having modest temperature gradients (< 50 K). The TEGs with the
area of ~0.33 m^2 are shown capable of powering a wireless sensor node of
multiple sensors ... | 1909.12042v2 |
2019-09-26 | Quantum effects in graphitic materials: Colossal magnetoresistance, Andreev reflections, Little-Parks effect, ferromagnetism, and granular superconductivity | Unlike the more common local conductance spectroscopy, nonlocal conductance
can differentiate between nontopological zero-energy modes localized around
inhomogeneities, and true Majorana edge modes in the topological phase. In
particular, negative nonlocal conductance is dominated by the crossed Andreev
reflection. In ... | 1909.12145v1 |
2015-05-18 | Photoemission System with Polarized Hard X-rays for Probing Ground State Symmetry of Strongly Correlated Materials | We have developed a polarized hard X-ray photoemission (HAXPES) system to
study the ground-state symmetry of strongly correlated materials. The linear
polarization of the incoming X-ray beam is switched by the transmission-type
phase retarder composed of two diamond (100) crystals. The best degree of the
linear polariz... | 1505.04591v1 |
2017-01-02 | Thermoelectric power factor enhancement by spin-polarized currents - a nanowire case study | Thermoelectric (TE) measurements have been performed on the workhorses of
today's data storage devices, exhibiting either the giant or the anisotropic
magnetoresistance effect (GMR and AMR). The temperature-dependent (50-300 K)
and magnetic field-dependent (up to 1 T) TE power factor (PF) has been
determined for severa... | 1701.00404v1 |
2018-11-20 | Towards integrated metatronics: a holistic approach on precise optical and electrical properties of Indium Tin Oxide | The class of transparent conductive oxides includes the material indium tin
oxide (ITO) and has become a widely used material of modern every-day life such
as in touch screens of smart phones and watches, but also used as an optically
transparent low electrically-resistive contract in the photovoltaics industry.
More r... | 1811.08344v4 |
2018-11-30 | Thermal Transport Across Graphene Step Junctions | Step junctions are often present in layered materials, i.e. where
single-layer regions meet multi-layer regions, yet their effect on thermal
transport is not understood to date. Here, we measure heat flow across graphene
junctions (GJs) from monolayer to bilayer graphene, as well as bilayer to
four-layer graphene for t... | 1811.12622v1 |
2019-05-29 | Physical mechanisms involved in the formation and operation of memory devices based on a monolayer of gold nanoparticles-polythiophene hybrid materials | Understanding the physical and chemical mechanisms occurring during the
forming process and operation of an organic resistive memory device is a major
issue for better performances. Various mechanisms were suggested in vertically
stacked memory structures, but the analysis remains indirect and needs
destructive charact... | 1905.12719v1 |
2020-03-25 | Synergistically creating sulfur vacancies in semimetal-supported amorphous MoS2 for efficient hydrogen evolution | The presence of elemental vacancies in materials is inevitable according to
statistical thermodynamics, which will decide the chemical and physical
properties of the investigated system. However, the controlled manipulation of
vacancies for specific applications is a challenge. Here we report a facile
method for creati... | 2003.11436v1 |
2020-04-01 | Physical properties and thermal stability of Fe5GeTe2 single crystals | The magnetic and transport properties of Fe-deficient Fe5GeTe2 single
crystals (Fe5-xGeTe2 with x~0.3) were studied and the impact of thermal
processing was explored. Quenching crystals from the growth temperature has
been previously shown to produce a metastable state that undergoes a strongly
hysteretic first-order t... | 2004.00494v1 |
2020-04-14 | Photoanodes Based on TiO$_2$ and $α$-Fe$_2$O$_3$ for Solar Water Splitting Superior Role of 1D Nanoarchitectures and of Combined Heterostructures | Solar driven photoelectrochemical water splitting (PEC-WS) using
semiconductor photoelectrodes represents a promising approach for a sustainable
and environmentally friendly production of renewable energy vectors and fuel
sources, such as dihydrogen (H2). In this context, titanium dioxide (TiO$_2$)
and iron oxide (hema... | 2004.12844v1 |
2007-10-08 | Colossal dielectric constants in single-crystalline and ceramic CaCu3Ti4O12 investigated by broadband dielectric spectroscopy | In the present work the authors report results of broadband dielectric
spectroscopy on various samples of CaCu3Ti4O12, including so far only rarely
investigated single crystalline material. The measurements extend up to 1.3
GHz, covering more than nine frequency decades. We address the question of the
origin of the col... | 0710.1610v1 |
2017-04-13 | Extreme Magnetoresistance in Magnetic Rare Earth Monopnictides | The acute sensitivity of the electrical resistance of certain systems to
magnetic fields known as extreme magnetoresistance (XMR) has recently been
explored in a new materials context with topological semimetals. Exemplified by
WTe$_{2}$ and rare earth monopnictide La(Sb,Bi), these systems tend to be
non-magnetic, near... | 1704.04226v1 |
2018-08-28 | Mott metal-insulator transitions in pressurized layered trichalcogenides | Transition metal phosphorous trichalcogenides, $M{\rm P}X_3$ ($M$ and $X$
being transition metal and chalcogen elements respectively), have been the
focus of substantial interest recently because of their possible magnetism in
the two-dimensional limit. Here we investigate material properties of the
compounds with $M$ ... | 1808.09263v2 |
2019-03-01 | Unraveling Bulk and Grain Boundary Electrical Properties in La0.8Sr0.2Mn1-yO3 Thin Films | Grain boundaries in Sr-doped LaMnO3 thin films have been shown to strongly
influence the electronic and oxygen mass transport properties, being able to
profoundly modify the nature of the material. The unique behaviour of the grain
boundaries can be correlated with substantial modifications of the cation
concentration ... | 1903.00235v1 |
2019-04-12 | Spin-dependent transport in van der Waals magnetic tunnel junctions with Fe3GeTe2 electrodes | Van der Waals (vdW) heterostructures, stacking different two-dimensional
materials, have opened up unprecedented opportunities to explore new physics
and device concepts. Especially interesting are recently discovered
two-dimensional magnetic vdW materials, providing new paradigms for spintronic
applications. Here, usi... | 1904.06098v1 |
2019-12-13 | Shallow impurity band in ZrNiSn | ZrNiSn and related half Heusler compounds are candidate materials for
efficient thermoelectric energy conversion with a reported thermoelectric
figure-of-merit of n-type ZrNiSn exceeding unity. Progress on p-type materials
has been more limited, which has been attributed to the presence of an impurity
band, possibly re... | 1912.06539v1 |
2020-12-23 | A general theory for anisotropic Kirchhoff-Love shells with in-plane bending of embedded fibers | This work presents a generalized Kirchhoff-Love shell theory that can
explicitly capture fiber-induced anisotropy not only in stretching and
out-of-plane bending, but also in in-plane bending. This setup is particularly
suitable for heterogeneous and fibrous materials such as textiles,
biomaterials, composites and pant... | 2101.03122v3 |
2012-03-06 | Discrete modelling of capillary mechanisms in multi-phase granular media | A numerical study of multi-phase granular materials based upon
micro-mechanical modelling is proposed. Discrete element simulations are used
to investigate capillary induced effects on the friction properties of a
granular assembly in the pendular regime. Capillary forces are described at the
local scale through the Yo... | 1203.1234v1 |
2015-06-12 | Current-limiting challenges for all-spin logic devices | All-spin logic device (ASLD) has attracted increasing interests as one of the
most promising post-CMOS device candidates, thanks to its low power,
non-volatility and logic-in-memory structure. Here we investigate the key
current-limiting factors and develop a physics-based model of ASLD through
nano-magnet switching, t... | 1506.03946v2 |
2019-01-15 | Phenomenal magneto-elastoresistance of WTe$_{2}$: strain engineering of electronic and quantum transport properties | Elastoresistance describes the relative change of a material's resistance
when strained. It has two major contributions: strain induced geometric and
electronic changes. If the geometric factor dominates, like in ordinary metals
such as copper, the elastoresistance is positive and rather small, i.e.
typically of order ... | 1901.05090v1 |
2019-10-26 | Magic continuum in twisted bilayer WSe2 | Emergent quantum phases driven by electronic interactions can manifest in
materials with narrowly dispersing, i.e. "flat", energy bands. Recently, flat
bands have been realized in a variety of graphene-based heterostructures using
the tuning parameters of twist angle, layer stacking and pressure, and
resulting in corre... | 1910.12147v1 |
2020-06-26 | YBCO-based non-volatile ReRAM tested in Low Earth Orbit | An YBCO-based test structure corresponding to the family of ReRAM devices
associated with the valence change mechanism is presented. We have
characterized its electrical response previous to its lift-off to a Low Earth
Orbit (LEO) using standard electronics and also with the dedicated LabOSat-01
controller. Similar res... | 2006.15062v1 |
2020-07-22 | Machine Learning Potential for Hexagonal Boron Nitride Applied to Thermally and Mechanically Induced Rippling | We introduce an interatomic potential for hexagonal boron nitride (hBN) based
on the Gaussian approximation potential (GAP) machine learning methodology. The
potential is based on a training set of configurations collected from density
functional theory (DFT) simulations and is capable of treating bulk and
multilayer h... | 2007.11448v3 |
2020-07-24 | Determination of the spin Hall angle, spin mixing conductance and spin diffusion length in Ir/CoFeB for spin-orbitronic devices | Iridium is a very promising material for spintronic applications due to its
interesting magnetic properties such as large RKKY exchange coupling as well as
its large spin-orbit coupling value. Ir is for instance used as a spacer layer
for perpendicular synthetic antiferromagnetic or ferrimagnet systems. However,
only a... | 2007.12413v1 |
2020-10-06 | Conductance Model for Single-Crystalline/Compact Metal Oxide Gas Sensing Layers in the Non-Degenerate Limit: Example of Epitaxial SnO$_2$(101) | Semiconducting metal oxide (SMOX)-based gas sensors are indispensable for
safety and health applications, e.g. explosive, toxic gas alarms, controls for
intake into car cabins and monitor for industrial processes. In the past, the
sensor community has been studying polycrystalline materials as sensors where
the porous ... | 2010.02962v1 |
2020-11-16 | Ferroelectric tunnel junctions | My research is dedicated to the electronic properties of functional oxides.
My activity specifically focuses on ferroelectric tunnel junctions in which an
ultrathin layer of ferroelectric material is intercalated between two metallic
electrodes. In these devices, polarization reversal induces large modifications
of the... | 2011.07864v1 |
2021-02-09 | Quasi-quantized Hall response in bulk InAs | The quasi-quantized Hall effect (QQHE) is the three-dimensional (3D)
counterpart of the integer quantum Hall effect (QHE),exhibited only by
two-dimensional (2D) electron systems. It has recently been observed in layered
materials, consisting of stacks of weakly coupled 2D platelets that are yet
characterized by a 3D an... | 2102.04928v3 |
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