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2016-05-13 | Quantifying structure-property relationships during resistance spot welding of an aluminum 6061-T6 joint | Microstructure-property relationships of resistance spot welded 6061-T6
aluminum alloy lap joints were investigated via mechanical testing and
microscopy techniques. Quasi-static tensile and novel shear punch tests were
employed to measure the mechanical properties of the distinct weld regions.
Quasi-static tensile and... | 1605.04251v1 |
2016-05-14 | Observation of orbital two-channel Kondo effect in a ferromagnetic L10-MnGa film | The experimental existence and stability of the quantum criticality point of
the two-channel Kondo (2CK) effect displaying exotic non-Fermi liquid physics
has been buried in persistent confusion despite the intensive theoretical and
experimental efforts in past three decades. Here we report an experimental
realization ... | 1605.04366v4 |
2016-05-17 | Pressure-Driven Quantum Criticality and T/H Scaling in the Icosahedral Au-Al-Yb Approximant | We report on ac magnetic susceptibility measurements under pressure of the
Au-Al-Yb alloy, a crystalline approximant to the icosahedral quasicrystal that
shows unconventional quantum criticality. In describing the susceptibility as
$\chi(T)^{-1} - \chi(0)^{-1} \propto T^{\gamma}$, we find that $\chi(0)^{-1}$
decreases ... | 1605.05012v1 |
2016-05-25 | Quantum Criticality and Inhomogeneous Magnetic Order in Fe-doped alpha-YbAlB4 | The intermediate-valent polymorphs $\alpha$- and $\beta$-YbAlB$_4$ exhibit
quantum criticality and other novel properties not usually associated with
intermediate valence. Iron doping induces quantum criticality in
$\alpha$-YbAlB$_4$ and magnetic order in both compounds. We report results of
muon spin relaxation ($\mu$... | 1605.07993v1 |
2016-05-31 | Spin-Orbit Torques in ferrimagnetic GdFeCo Alloys | The spin-orbit torque switching of ferrimagnetic
Gd$_x$(Fe$_{90}$Co$_{10}$)$_{100-x}$ films was studied for both transition
metal (TM)-rich and rare earth (RE)-rich configurations. The spin-orbit torque
driven magnetization switching follows the same handedness in TM-rich and
RE-rich samples with respect to the total m... | 1605.09498v1 |
2016-06-05 | A bound on the averaged spectral shift function and a lower bound on the density of states for random Schrödinger operators on $\mathbb{R}^d$ | We obtain a bound on the expectation of the spectral shift function for
alloy-type random Schr\"odinger operators on $\mathbb{R}^d$ in the region of
localisation, corresponding to a change from Dirichlet to Neumann boundary
conditions along the boundary of a finite volume. The bound scales with the
area of the surface ... | 1606.01579v1 |
2016-06-07 | Characterization of crystal structure and precipitation crystallography of a new MgxAl2-xGd phase in Mg97Al1Gd2 alloy | The composition, crystal structure and precipitation crystallography of a
newly found precipitate are characterized by a Cs-corrected scanning
transmission electron microscopy (STEM). The composition of the plate-like
precipitate could be expressed as MgxAl2-xGd (x = 0.38), and its crystal
structure is the same as the ... | 1606.02067v1 |
2016-06-08 | Skyrmions with attractive interactions in an ultrathin magnetic film | We determined the parameters of a classical spin Hamiltonian describing an Fe
monolayer on Pd(111) surface with a Pt_{1-x}Ir_{x} alloy overlayer from ab
initio calculations. While the ground state of the system is ferromagnetic for
x=0.00, it becomes a spin spiral state as Ir is intermixed into the overlayer.
Although ... | 1606.02464v2 |
2016-06-17 | Ultra-high oxidation potential of Ti/Cu-SnO2 anodes fabricated by spray pyrolysis for wastewater treatment | High oxidation potential indicates anodes have high oxidation power and high
current efficiency for organics oxidation. In this paper, we prepared
Ti/Cu-SnO2 anodes using spray pyrolysis method. The Ti/Cu-SnO2 anodes have an
ultra-high oxidation potential of about 2.7 V vs NHE, suitable for use in
wastewater treatment.... | 1606.06332v1 |
2016-06-17 | Effects of nickel doping on the preferred orientation and oxidation potential of Ti/Sb-SnO2 anodes prepared by spray pyrolysis | Nickel and antimony co-doped Ti/SnO2 (Ti/Ni-Sb-SnO2) anodes were prepared by
spray pyrolysis. Effects of nickel concentration on the structure and onset
potential for oxygen evolution of Ti/Ni-Sb-SnO2 anodes have been systematically
investigated. XRD analyses suggest that SnO2 thin films grow in preferential
orientatio... | 1606.06574v1 |
2016-07-01 | Saturation magnetization and band gap tuning in BiFeO$_3$ nanoparticles via co-substitution of Gd and Mn | In this investigation, Gd and Mn co-doped
Bi$_{0.85}$Gd$_{0.15}$Fe$_{1-x}$Mn$_x$O$_3$ (x=0.0-0.15) nanoparticles have
been prepared to report the influence of co-substitution on their structural,
optical, magnetic and electrical properties. Due to simultaneous substitution
of Gd and Mn in BiFeO$_3$, the crystal structu... | 1607.00158v1 |
2016-07-07 | Giant perpendicular magnetic anisotropy energies in CoPt thin films: Impact of reduced dimensionality and imperfections | The impact of reduced dimensionality on the magnetic properties of the
tetragonal L1$_{0}$ CoPt alloy is investigated from ab-initio considering
several kinds of surface defects. By exploring the dependence of the
magnetocrystalline anisotropy energy (MAE) on the thickness of CoPt thin films,
we demonstrate the crucial... | 1607.01919v2 |
2016-07-18 | Engineering the polar magneto-optical Kerr effect in strongly strained L10-MnAl films | We report the engineering of the polar magnetooptical (MO) Kerr effect in
perpendicularly magnetized L10-MnAl epitaxial films with remarkably tuned
magnetization, strain, and structural disorder by varying substrate temperature
(Ts) during molecular-beam epitaxy growth. The Kerr rotation was enhanced by a
factor of up ... | 1607.04938v4 |
2016-07-21 | Phonon broadening from supercell lattice dynamics: random and correlated disorder | We demonstrate how supercell implementations of conventional lattice
dynamical calculations can be used to determine the extent and nature of
disorder-induced broadening in the phonon dispersion spectrum of disordered
crystalline materials. The approach taken relies on band unfolding, and is
first benchmarked against v... | 1607.06337v1 |
2016-07-22 | Wavelength extension beyond 1.5 micrometer in symmetric InAs quantum dots on InP(111)A using droplet epitaxy | By using a C3v symmetric (111) surface as a growth substrate, we are able to
achieve high structural symmetry in self-assembled quantum dots, which are
suitable for use as quantum-entangled photon emitters. Here we report on the
wavelength controllability of InAs dots on InP(111)A, which we realized by
tuning the terna... | 1607.06859v1 |
2016-07-27 | Influence of complex disorder on skew-scattering Hall effects in $L1_0$-ordered FePt alloy | We show by first-principles calculations that the skew-scattering anomalous
Hall and spin-Hall angles of L$1_0$-ordered FePt drastically depend on
different types of disorder. A different sign of the AHE is obtained when
slightly deviating from the stoichiometric ratio towards the Fe-rich side as
compared to the Pt-ric... | 1607.08042v1 |
2016-08-05 | Mechanical dissipation in MoRe superconducting metal drums | We experimentally investigate dissipation in mechanical resonators made of a
disordered superconducting thin film of Molybdenum-Rhenium(MoRe) alloy. By
electrostatically driving the drum with a resonant AC voltage, we detect its
motion using a superconducting microwave cavity. From the temperature
dependence of mechani... | 1608.01871v1 |
2016-08-08 | Computational study of atomic mobility in HCP Mg-Al-Zn ternary alloys | The experimental data in the literature for the hcp phase of the Mg-Al-Zn
ternary system have been critically reviewed. Based on the concentration
profiles from the literature, the diffusion coefficients have been re-extracted
using the Hall method for the impurity diffusion, and the Sauer-Freise and the
Whittle-Green ... | 1608.02349v1 |
2016-08-18 | Driving force for martensitic transformation in Ni$_{2}$Mn$_{1+x}$Sn$_{1-x}$ | The martensitic transformation in Ni$_{2}$Mn$_{1+x}$Sn$_{1-x}$ alloys has
been investigated within ab-initio density functional theory. The experimental
trend of a martensitic transition happening beyond $x$ = 0.36 is captured
within these calculations. The microscopic considerations leading to this are
traced to incre... | 1608.05181v1 |
2016-08-24 | AlGaN Channel Field Effect Transistors with Graded Heterostructure Ohmic Contacts | We report on ultra-wide bandgap (UWBG) Al0.75Ga0.25N channel
metal-insulator-semiconductor field-effect transistors (MISFET) with
heterostructure engineered low-resistance ohmic contacts. The low intrinsic
electron affinity of AlN (0.6 eV) leads to large Schottky barriers at
metal-AlGaN interface, resulting in highly r... | 1608.06686v1 |
2016-08-24 | Chemical ordering beyond the superstructure in long-range ordered systems | To describe chemical ordering in solid solutions systems Warren-Cowley
short-range parameters are ordinarily used. However, they are not directly
suited for application to long-range ordered systems, as they do not converge
to zero for large separations. It is the aim of this paper to generalize the
theory to long-rang... | 1608.06870v1 |
2016-09-02 | Temperature-dependent photoluminescence characteristics of GeSn epitaxial layers | GeSn epitaxial heterostructures are emerging as prominent candidates for the
monolithic integration of light sources on Si substrates. Here we propose a
judicious explanation for their temperature-dependent photoluminescence (PL)
that is based upon the so far disregarded optical activity of dislocations. By
working at ... | 1609.00542v1 |
2016-09-05 | Critical Current Oscillations of Josephson Junctions Containing PdFe Nanomagnets | Josephson junctions with ferromagnetic layers are vital elements in a new
class of cryogenic memory devices. One style of memory device contains a spin
valve with one "hard" magnetic layer and one "soft" layer. To achieve low
switching fields, it is advantageous for the soft layer to have low
magnetization and low magn... | 1609.01330v1 |
2016-09-06 | Impact of finite temperatures on the transport properties of Gd from first principles | Finite temperature effects have a pronounced impact on the transport
properties of solids. In magnetic systems, besides the scattering of conduction
electrons by impurities and phonons, an additional scattering source coming
from the magnetic degrees of freedom must be taken into account. A
first-principle scheme which... | 1609.01767v1 |
2016-09-13 | Extension of Configurational Polyhedra to Finite Temperature Property | Configurational polyhedora (CP) is a hyperpolyhedra on multidimensional
configuration space, whose vertex (and edges) corresponds to upper or lower
limit value of correlation functions for all possible atomic configuration on
given lattice. In classical systems where physical property including internal
energy and elas... | 1609.03859v1 |
2016-09-14 | Magnetic field effects in electron systems with imperfect nesting | We analyze the effects of an applied magnetic field on the phase diagram of a
weakly-correlated electron system with imperfect nesting. The Hamiltonian under
study describes two bands: electron and hole ones. Both bands have spherical
Fermi surfaces, whose radii are slightly mismatched due to doping. These types
of mod... | 1609.04279v2 |
2016-09-19 | Switching ferromagnetic spins by an ultrafast laser pulse: Emergence of giant optical spin-orbit torque | Faster magnetic recording technology is indispensable to massive data storage
and big data sciences. {All-optical spin switching offers a possible solution},
but at present it is limited to a handful of expensive and complex rare-earth
ferrimagnets. The spin switching in more abundant ferromagnets may
significantly exp... | 1609.05855v1 |
2016-09-26 | Far-infrared quantum cascade lasers operating in AlAs phonon Reststrahlen band | We report on the operation of a double metal waveguide far-infrared quantum
cascade laser emitting at 28 $\mu$m, corresponding to the AlAs-like phonon
Reststrahlen band. To avoid absorption by AlAs-like optical phonons, the
Al-free group-V alloy GaAs$_{0.51}$Sb$_{0.49}$ is used as a barrier layer in
the bound-to-contin... | 1609.08196v1 |
2016-09-28 | ThCr2Si2-type Ru-based superconductors LaRu2M2 (M = P and As): An ab-initio investigation | ThCr2Si2-type Ru-based superconductors LaRu2P2 and LaRu2As2 with Tc ~ 4 K and
7.8 K respectively have been reported very recently. Using the first principles
method we investigate the details physical and superconducting properties
including the structural properties, electronic properties, elastic properties
and Therm... | 1609.08856v2 |
2016-09-29 | Raman study of the vibrational modes in ZnGeN2 (0001) | A Raman spectroscopy study was carried out for ZnGeN2 with direction of
propagation along the (0001) crystallographic direction on hexagonal single
crystal platelets obtained by reaction of gaseous ammonia with a Zn-Ge-Sn
liquid alloy at 758 degree C. The sample geometry allowed measurement of the a2
and a1 Raman modes... | 1609.09535v1 |
2016-10-04 | Reasoning about identifier spaces: How to make Chord correct | The Chord distributed hash table (DHT) is well-known and often used to
implement peer-to-peer systems. Chord peers find other peers, and access their
data, through a ring-shaped pointer structure in a large identifier space.
Despite claims of proven correctness, i.e., eventual reachability, previous
work has shown that... | 1610.01140v2 |
2016-10-06 | The molybdenum-titanium phase diagram evaluated from ab-initio calculations | The design of next generation \beta-type titanium implants requires detailed
knowledge of the relevant stable and metastable phases at temperatures where
metallurgical heat treatments can be performed. Recently, a standard
specification for surgical implant applications was established for Mo-Ti
alloys. However, the th... | 1610.01995v1 |
2016-10-10 | Origin of magnetic anisotropy in doped Ce$_2$Co$_{17}$ alloys | Magnetocrystalline anisotropy (MCA) in doped Ce$_{2}$Co$_{17}$ and other
competing structures was investigated using density functional theory. We
confirmed that the MCA contribution from dumbbell Co sites is very negative.
Replacing Co dumbbell atoms with a pair of Fe or Mn atoms greatly enhance the
uniaxial anisotrop... | 1610.02767v2 |
2016-10-11 | Large magnetic anisotropy predicted for rare-earth free Fe16-xCoxN2 alloys | Structures and magnetic properties of Fe16-xCoxN2 are studied using adaptive
genetic algorithm and first-principles calculations. We show that substituting
Fe by Co in Fe16N2 with Co/Fe ratio smaller than 1 can greatly improve the
magnetic anisotropy of the material. The magnetocrystalline anisotropy energy
from first-... | 1610.03544v1 |
2016-10-12 | On the limits to mobility in InAs quantum wells with nearly lattice-matched barriers | The growth and the density dependence of the low temperature mobility of a
series of two-dimensional electron systems confined to un-intentionally doped,
low extended defect density InAs quantum wells with Al$_{1-x}$Ga$_{x}$Sb
barriers are reported. The electron mobility limiting scattering mechanisms
were determined b... | 1610.03785v2 |
2016-10-16 | Chalcogenide Perovskites- an Emerging Class of Ionic Semiconductors | We report the synthesis and characterization of a novel class of ionic
semiconductor materials- inorganic chalcogenide perovskites. Several different
compounds including BaZrS3, CaZrS3, SrTiS3 and SrZrS3 were synthesized by high
temperature sulfurization of their oxide counterparts. Their crystal structures
were identi... | 1610.04882v1 |
2016-10-17 | Modified Bohm's theory for abstruse measurements: application to layer depth profiling by Auger spectroscopy | Modified Bohm formalism is applied to solve a problem of abstruse layer depth
profiles measured by the Auger electron spectroscopy technique in real physical
systems, i.e., the desorbed carbon/passive layer on NiTi substrate and the
adsorbed oxygen/surface of NiTi alloy. It is shown that abstruse layer profiles
may be ... | 1610.05100v2 |
2016-10-29 | Excess Volume at Grain Boundaries in hcp Metals | The excess volume associated with grain boundaries represents a key
structural parameter for the characterization of grain boundaries. It plays a
critical role in segregation of impurity and alloy elements to grain
boundaries, and influences significantly the mechanical and functional
properties of materials. We have c... | 1610.09494v2 |
2016-10-30 | Insulator-metal transition in deep Sr-vacant spin-orbit Mott insulator Sr2IrO4 | Sr2IrO4 exhibits a novel insulating state assisted by spin-orbit
interactions. A series of polycrystalline samples of Sr2-xIrO4 have been
synthesized. It is found that deep Sr-vacancies of Sr2-xIrO4 greatly reduce the
rotation of IrO6 octahedral, and more importantly, a significant structural
change occurs around x = 0... | 1610.09594v1 |
2016-10-31 | Compositional asymmetry of disordered structure: Role of spatial constraint | When spatial constraint for the constituents (e.g., atom or particle) of
system is once given, disordered structure for non-interacting system in
equilibrium states is symmetric with respect to equiatomic composition.
Meanwhile, when the interaction between constituents is introduced, this
symmetry is typically broken,... | 1610.09797v2 |
2016-11-01 | Shear softening of Earth's inner core indicated by its high Poisson's ratio and elastic anisotropy | Earth's inner core exhibits an unusually high Poisson's ratio and noticeable
elastic anisotropy. The mechanisms responsible for these features are critical
for understanding the evolution of the Earth but remain unclear. This study
indicates that once the correct formula for the shear modulus is used, shear
softening c... | 1611.00244v1 |
2016-11-14 | Local environment effects on a charge carrier injected into an Ising chain | We present numerically exact results for the spectral function of a single
charge carrier that is injected into an Ising chain at finite temperature $T$.
Both ferromagnetic and antiferromagnetic coupling between the Ising spins are
considered. The interaction between the carrier and the Ising spins is assumed
to be on-... | 1611.04560v1 |
2016-11-22 | AlM2B2 (M=Cr, Mn, Fe, Co, Ni): a group of nanolaminated materials | Combining theory with experiments, we study the phase stability, elastic
properties, electronic structure and hardness of layered ternary borides
AlCr2B2, AlMn2B2, AlFe2B2, AlCo2B2, and AlNi2B2. We find that the first three
borides of this series are stable phases, while AlCo2B2 and AlNi2B2 are
metastable. We show that... | 1611.07190v1 |
2016-11-24 | Argon assisted chemical vapor deposition of CrO$_2$: an efficient process leading to high quality epitaxial films | A comparative study of the structural, microstructural and magnetic
properties of CrO$_2$ thin films grown onto (110) and (100) TiO$_2$ rutile
single crystal substrates by chemical vapor deposition (CVD), using CrO$_3$ as
chromium precursor and either oxygen or argon as carrier gas is presented. Our
results show that g... | 1611.08155v1 |
2016-11-24 | Linking microstructural evolution and macro-scale friction behavior in metals | A correlation is established between the macro-scale friction regimes of
metals and a transition between two dominant atomistic mechanisms of
deformation. Metals tend to exhibit bi-stable friction behavior -- low and
converging or high and diverging. These general trends in behavior are shown to
be largely explained us... | 1611.08200v1 |
2016-11-28 | Magnetism of a sigma-phase Fe60V40 alloy: magnetic susceptibilities and magnetocaloric effect studies | Magnetic properties of a sigma-phase Fe60V40 intermetallic compound were
studied by means of ac and dc magnetic susceptibility and magnetocaloric effect
measurements. The compound is a soft magnet yet it was found to behave like a
re-entrant spin-glass system. The magnetic ordering temperature was found to be
T_C ca.17... | 1611.09186v1 |
2017-01-06 | Investigation of periodic-layered structure in Zn/CuxTiy systems | Diffusion couples Zn/CuxTiy were prepared by the melting contact method and
then annealed at 663K for various times. Using scanning electron microscopy
(SEM) with energy dispersive X-ray spectroscopy (EDS), we discovered 7 new
systems, i.e. Zn/Cu9Ti, Zn/Cu4Ti, Zn/Cu2Ti, Zn/Cu7Ti3, Zn/Cu3Ti2, Zn/Cu11Ti9
and Zn/Cu9Ti11, ... | 1701.01594v1 |
2017-01-09 | Generating derivative superstructures for systems with high configurational freedom | Modeling potential alloys requires the exploration of all possible
configurations of atoms. Additionally, modeling the thermal properties of
materials requires knowledge of the possible ways of displacing the atoms. One
solution to finding all symmetrically unique configurations and displacements
is to generate the com... | 1701.02382v1 |
2017-01-11 | Potassium self-diffusion in a K-rich single-crystal alkali feldspar | The paper reports potassium diffusion measurements performed on gem-quality
single-crystal alkali feldspar in the temperature range from $1169$ to $1021 \,
\mbox{K}$. Natural sanidine from Volkesfeld, Germany was implanted with
$\mbox{}^{43}\mbox{K}$ at the ISOLDE/CERN radioactive ion-beam facility normal
to the (001) ... | 1701.02884v1 |
2017-01-11 | Interface mediated mechanisms of plastic strain recovery in AgCu alloy | Through the combination of transmission electron microscopy analysis of the
deformed microstructure and molecular dynamics computer simulations of the
deformation processes, the mechanisms of plastic strain recovery in bulk AgCu
eutectic with either incoherent twin or cube-on-cube interfaces between the Ag
and Cu layer... | 1701.03033v1 |
2017-01-13 | Raman spectral shift versus strain and composition in GeSn layers with: 6 to 15% Sn contents | GeSn alloys are the subject of intense research activities as these group IV
semiconductors present direct bandgap behaviors for high Sn contents. Today,
the control of strain becomes an important challenge to improve GeSn devices.
Strain micro-measurements are usually performed by Raman spectroscopy. However,
differen... | 1701.03788v1 |
2017-01-16 | The role of atomic orbitals of doped earth-abundant metals on designed copper catalytic surfaces | It is a general challenge to design highly active or selective earth-abundant
metals for catalytic hydrogenation. Here, we demonstrated an effective
computational approach based on inverse molecular design theory to
deterministically search for optimal binding sites on Cu (100) surface through
the doping of Fe and/or Z... | 1701.04333v2 |
2017-01-23 | Arbitrary order 2D virtual elements for polygonal meshes: Part II, inelastic problem | The present paper is the second part of a twofold work, whose first part is
reported in [3], concerning a newly developed Virtual Element Method (VEM) for
2D continuum problems. The first part of the work proposed a study for linear
elastic problem. The aim of this part is to explore the features of the VEM
formulation... | 1701.06676v2 |
2017-01-24 | Ion-Beam-Induced Defects in CMOS Technology: Methods of Study | Ion implantation is a non-equilibrium doping technique which introduces
impurity atoms into a solid regardless of thermodynamic considerations. The
formation of metastable alloys above the solubility limit, minimized
contribution of lateral diffusion processes in device fabrication, and
possibility to reach high concen... | 1701.07087v2 |
2017-01-25 | Direct Mapping of Spin and Orbital Entangled Wavefunction under Interband Spin-Orbit coupling of Rashba Spin-Split Surface States | We use spin- and angle-resolved photoemission spectroscopy (SARPES) combined
with polarization-variable laser and investigate the spin-orbit coupling effect
under interband hybridization of Rashba spin-split states for the surface
alloys Bi/Ag(111) and Bi/Cu(111). In addition to the conventional band mapping
of photoem... | 1701.07269v1 |
2017-01-25 | Thin films with precisely engineered nanostructures | Synthesis of rationally designed nanostructured materials with optimized
mechanical properties, e.g., high strength with considerable ductility,
requires rigorous control of diverse microstructural parameters including the
mean size, size dispersion and spatial distribution of grains. However,
currently available synth... | 1701.07509v1 |
2017-01-30 | Does the repulsive interatomic potential determine fragility in metallic liquids? | The dynamical behavior of liquids is frequently characterized by the
fragility, which can be defined from the temperature dependence of the shear
viscosity, {\eta}. For a strong liquid, the activation energy for {\eta}
changes little with cooling towards the glass transition temperature, Tg. The
change is much greater ... | 1701.08454v1 |
2017-03-01 | Tunnel-injected sub-260 nm ultraviolet light emitting diodes | We report on tunnel-injected deep ultraviolet light emitting diodes (UV LEDs)
configured with a polarization engineered Al0.75Ga0.25N/ In0.2Ga0.8N tunnel
junction structure. Tunnel-injected UV LED structure enables n-type contacts
for both bottom and top contact layers. However, achieving Ohmic contact to
wide bandgap ... | 1703.00117v1 |
2017-03-01 | Thickness Dependence of Spin-Orbit Torques in Ferrimagnetic GdFeCo Alloys | So far, studies of spin-orbit torques (SOT) in ferromagnets with
perpendicular magnetic anisotropy (PMA) have been restricted to ultra thin
samples, while a systematic study of its thickness dependence is still lacking
in literature. In this article we discuss the thickness dependence of SOT in
GdFeCo samples with bulk... | 1703.00146v1 |
2017-03-12 | Standardization of Proton Induced X-Ray Emission for Analysis of Trace Elements in Thick Targets | This paper presents the standardization of Proton Induced X-rays Emission
(PIXE) technique for the trace element analysis of thick standard samples.
Three standard reference materials (SRMs) viz-\`a-vis titanium, copper and iron
base alloys were used for the study due to their availability. The protons beam
was acceler... | 1703.04532v2 |
2017-03-20 | Elastic, thermodynamic, electronic and optical properties of recently discovered transition metal boride NbRuB superconductors: an ab-initio investigation | The elastic, thermodynamic, electronic, and optical properties of recently
discovered and potentially technologically important transition metal boride
NbRuB, have been investigated using the density functional formalism. Both
generalized gradient approximation (GGA) and local density approximation (LDA)
were used for ... | 1703.06707v1 |
2017-03-24 | Studies of the Response of the SiD Silicon-Tungsten ECal | Studies of the response of the SiD silicon-tungsten electromagnetic
calorimeter (ECal) are presented. Layers of highly granular (13 mm^2 pixels)
silicon detectors embedded in thin gaps (~ 1 mm) between tungsten alloy plates
give the SiD ECal the ability to separate electromagnetic showers in a crowded
environment. A ni... | 1703.08605v1 |
2017-03-31 | Chalcogenide hyperbolic metamaterial with switchable negative refraction | Chalcogenide glasses are exceptional materials that show a wide contrast in
optical properties upon phase change and are highly researched for
reconfigurable electronic and nanophotonic devices. Here, we report the first
proof-of-concept demonstration of a non-volatile, switchable hyperbolic
metamaterial based on a cha... | 1703.10753v1 |
2017-07-11 | Aging, memory, and nonhierarchical energy landscape of spin jam | The notion of complex energy landscape underpins the intriguing dynamical
behaviors in many complex systems ranging from polymers, to brain activity, to
social networks and glass transitions. The spin glass state found in dilute
magnetic alloys has been an exceptionally convenient laboratory frame for
studying complex ... | 1707.03086v1 |
2017-07-13 | Towards the ab initio based theory of the phase transformations in iron and steel | Despite of the appearance of numerous new materials, the iron based alloys
and steels continue to play an essential role in modern technology. The
properties of a steel are determined by its structural state (ferrite,
cementite, pearlite, bainite, martensite, and their combination) that is formed
under thermal treatmen... | 1707.04287v1 |
2017-07-13 | Brittle to Quasi-Brittle Transition and Crack Initiation Precursors in Disordered Crystals | Crack initiation emerges due to a combination of elasticity, plasticity, and
disorder, and it is heavily dependent on the material's microstructural
details. In this paper, we investigate brittle metals with coarse-grained,
microstructural disorder that could originate in a material's manufacturing
process, such as all... | 1707.04332v1 |
2017-07-17 | Natural selection as coarsening | Analogies between evolutionary dynamics and statistical mechanics, such as
Fisher's second-law-like "fundamental theorem of natural selection" and
Wright's "fitness landscapes", have had a deep and fruitful influence on the
development of evolutionary theory. Here I discuss a new conceptual link
between evolution and s... | 1707.05317v2 |
2017-07-18 | Crystal Growth in Fluid Flow: Nonlinear Response Effects | We investigate crystal-growth kinetics in the presence of strong shear flow
in the liquid, using molecular-dynamics simulations of a binary-alloy model.
Close to the equilibrium melting point, shear flow always suppresses the growth
of the crystal-liquid interface. For lower temperatures, we find that the
growth veloci... | 1707.05513v1 |
2017-07-18 | From anti-perovskite to double anti-perovskite: lattice chemistry basis for super-fast transportation of Li+ ions in cubic solid lithium halogen-chalcogenides | Using a materials genome approach on the basis of the density functional
theory, we have formulated a new class of inorganic electrolytes for fast
diffusion of Li+ ions, through fine-tuning of lattice chemistry of
anti-perovskite structures. Systematic modelling has been carried out to
elaborate the structural stabilit... | 1707.05868v1 |
2017-07-27 | Nominal vs. actual supersaturation of solutions | Following the formalism of the Classical Nucleation Theory beyond the dilute
solution approximation, this paper considers a difference between the actual
solute supersaturation (given by the present-to-saturated solute activity
ratio) and the nominal supersaturation (given by the present-to-saturated
solute concentrati... | 1707.08777v3 |
2017-07-27 | Design rules for modulation-doped AlAs quantum wells | Thanks to their multi-valley, anisotropic, energy band structure,
two-dimensional electron systems (2DESs) in modulation-doped AlAs quantum wells
(QWs) provide a unique platform to investigate electron interaction physics and
ballistic transport. Indeed, a plethora of phenomena unseen in other 2DESs have
been observed ... | 1707.09011v2 |
2017-08-02 | Realistic finite temperature simulations of magnetic systems using quantum statistics | We have performed realistic atomistic simulations at finite temperatures
using Monte Carlo and atomistic spin dynamics simulations incorporating quantum
(Bose-Einstein) statistics. The description is much improved at low
temperatures compared to classical (Boltzmann) statistics normally used in
these kind of simulation... | 1708.00709v1 |
2017-08-03 | Ordered FePdCu nanoisland arrays made by templated solid-state dewetting | Ordered FePdCu nanoisland arrays were formed by annealing at 600oC, which
caused solid state dewetting of [Cu/Fe/Pd] multilayers deposited on
self-assembled SiO2 nanospheres with size of 100 nm. A single FePdCu island was
formed on the top of each SiO2 nanosphere. The structure of the obtained system
was studied by x-r... | 1708.01057v1 |
2017-08-17 | Three Phase-Grating Moire Neutron Interferometer for Large Interferometer Area Applications | We demonstrate a three phase-grating neutron interferometer as a robust
candidate for large area interferometry applications and characterization of
materials. This novel far-field moire technique allows for broad wavelength
acceptance and relaxed requirements related to fabrication and alignment,
circumventing the mai... | 1708.05421v1 |
2017-08-23 | A Review of Smart Materials in Tactile Actuators for Information Delivery | As the largest organ in the human body, the skin provides the important
sensory channel for humans to receive external stimulations based on touch. By
the information perceived through touch, people can feel and guess the
properties of objects, like weight, temperature, textures, and motion, etc. In
fact, those propert... | 1708.07077v2 |
2017-08-28 | Elastic impact of a sphere with an elastic half-space: numerical modeling and comparison with experiment | Numerical simulations of the dynamics of an elastic collision between a rigid
sphere and an elastic half-space are carried out. We assume an Amontons-Coulomb
frictional force with a fixed coefficient of friction between the contacting
surfaces during the impact. As a result of modeling a dimensionless function,
describ... | 1708.08531v1 |
2017-08-29 | Element-resolved ultrafast demagnetization rates in ferrimagnetic CoDy | Femtosecond laser induced ultrafast magnetization dynamics have been studied
in multisublattice CoxDy1-x alloys. By performing element and time-resolved
X-ray spectroscopy, we distinguish the ultrafast quenching of Co3d and Dy4f
magnetic order when the initial temperatures are below (T=150K) or above
(T=270K) the tempe... | 1708.08918v2 |
2017-08-29 | Ultrafast hot-electron induced quenching of Tb4f magnetic order | We have investigated ultrafast quenching of the Tb4f magnetic order in
Co74Tb26 alloys, induced by femtosecond hot-electrons pulses. The hot-electron
pulses were produced in specific non-magnetic capping layers by infrared fs
laser pulses. Our experimental results show that sub-picosecond dynamics of
Tb4f magnetic mome... | 1708.08919v2 |
2017-09-06 | The MRO-accompanied modes of Re-implantation into SiO2-host matrix: XPS and DFT based scenarios | The following scenarios of Re-embedding into SiO2-host by pulsed
Re-implantation were derived and discussed after XPS-and-DFT electronic
structure qualification: (i) low Re-impurity concentration mode -> the
formation of combined substitutional and interstitial impurities with
Re2O7-like atomic and electronic structure... | 1709.01673v1 |
2017-08-28 | Organic and perovskite solar cells for space applications | For almost sixty years, solar energy for space applications has relied on
inorganic photovoltaics, evolving from solar cells made of single crystalline
silicon to triple junctions based on germanium and III-V alloys. The class of
organic-based photovoltaics, which ranges from all-organic to hybrid
perovskites, has the ... | 1709.01787v2 |
2017-09-08 | Higher Sobolev Regularity of Convex Integration Solutions in Elasticity: The Dirichlet Problem with Affine Data in $\text{int}(K^{lc})$ | In this article we continue our study of higher Sobolev regularity of
flexible convex integration solutions to differential inclusions arising from
applications in materials sciences. We present a general framework yielding
higher Sobolev regularity for Dirichlet problems with affine data in
$\text{int}(K^{lc})$. This ... | 1709.02880v1 |
2017-09-15 | A Thermoelastoplastic Material Model for Finite-Strain Cyclic Plasticity of Metals | In this paper we present a thermodynamically consistent material model which
is capable of modelling ductile-to brittle failure mode transition in ductile
material undergoing deformations at high strain rates, and demonstrate the
performance of the model in a numerical study using a fully coupled
thermal-structural fin... | 1709.05416v1 |
2017-09-21 | Zero-Field Quantum Critical Point in Ce$_{0.91}$Yb$_{0.09}$CoIn$_5$ | We present results of specific heat, electrical resistance, and
magnetoresistivity measurements on single crystals of the heavy-fermion
superconducting alloy Ce$_{0.91}$Yb$_{0.09}$CoIn$_5$. Non-Fermi liquid to Fermi
liquid crossovers are clearly observed in the temperature dependence of the
Sommerfeld coefficient $\gam... | 1709.07161v3 |
2017-09-22 | A Co(II)-based Molecular Magnet with a 6 T Coercive Field | Hard magnets with high coercivity, such as Nd2Fe14B and SmCo5 alloys, can
maintain magnetisation under a high reverse external magnetic field and have
therefore become irreplaceable parts in many practical applications. Molecular
magnets are promising alternatives, owing to their precise and designable
chemical structu... | 1709.07697v2 |
2017-09-22 | On Extracting Mechanical Properties from Nanoindentation at Temperatures up to 1000$^{\circ}$C | Alloyed MCrAlY bond coats, where M is usually cobalt and/or nickel, are
essential parts of modern turbine blades, imparting environmental resistance
while mediating thermal expansivity differences. Nanoindentation allows the
determination of their properties without the complexities of traditional
mechanical tests, but... | 1709.07714v1 |
2017-08-09 | Metal passivation effect on focused beam-induced nonuniform structure changes of amorphous SiOx nanowire | Passivation effect of heterogeneous Au nanoparticles (AuNPs) on the
nonuniform structure changes of amorphous SiOx nanowire (a-SiOx NW) as
athermally induced by focused electron beam (e-beam) irradiation is
investigated in an in-situ transmission electron microscope. It is found that
at room temperature the straight an... | 1709.07920v1 |
2017-09-29 | Grain-size dependent electric-field induced structural changes in relaxor-ferroelectric based unclamped piezoelectric grains | Polymer-piezoceramic 0-3 composites combine the flexibility of the polymers
and the excellent piezoelectric properties of the ferroelectric based ceramic.
While grain size of the ceramic powder is one of the important considerations
in the fabrication of such composites, a correlation relating poling field
induced stru... | 1709.10231v1 |
2017-11-06 | Local Lorentz force and ultrasound Doppler velocimetry in a vertical convection liquid metal flow | We report velocity measurements in a vertical turbulent convection flow cell
that is filled with the eutectic liquid metal alloy gallium-indium-tin by the
use of local Lorentz force velocimetry (LLFV) and ultrasound Doppler
velocimetry (UDV). We demonstrate the applicability of LLFV for a thermal
convection flow and re... | 1711.01837v1 |
2017-11-07 | Identifying interatomic potentials for the accurate modeling of interfacial segregation and structural transitions | Chemical segregation and structural transitions at interfaces are important
nanoscale phenomena, making them natural targets for atomistic modeling, yet
interatomic potentials must be fit to secondary physical properties. To isolate
the important factors that interatomic potentials must capture in order to
accurately m... | 1711.02693v2 |
2017-11-09 | The search for high entropy alloys: a high-throughput $\textit{ab-initio}$ approach | While the ongoing search to discover new high-entropy systems is slowly
expanding beyond metals, a rational and effective method for predicting "in
silico" the solid solution forming ability of multi-component systems remains
yet to be developed. In this article, we propose a novel high-throughput
approach, called "LTV... | 1711.03426v2 |
2017-11-17 | Atom Probe Analysis of Ex Situ Gas-Charged Stable Hydrides | In this work, we report on the atom probe tomography analysis of two metallic
hydrides formed by pressurized charging using an ex situ hydrogen charging
cell, in the pressure range of 200-500 kPa (2-5 bar). Specifically we report on
the deuterium charging of Pd/Rh and V systems. Using this ex situ system, we
demonstrat... | 1711.06667v1 |
2017-11-20 | Computational analysis of short-range interactions between an edge dislocation and an array of equally-spaced identical shearable or non-shearable precipitates | The interaction between dislocations and precipitates plays an important role
in the mechanical behavior of alloys. To provide more insight into the physics
of this interaction, this research analyzes short-range interactions of an edge
dislocation with an array of equally-spaced identical precipitates. We use a
modifi... | 1711.07428v2 |
2017-11-29 | Tuning topological surface magnetism by bulk alloying | Deploying an analytical atomistic model of the bulk band structure of the
IV-VI semiconductors we connect the spin structure of the topological surface
state to the crystal field and spin orbit coupling parameters of the bulk
material. While the Dirac-Weyl (or equivalently, Rashba) type topological
surface state is oft... | 1711.10760v1 |
2017-12-07 | Grain boundary complexions and the strength of nanocrystalline metals: Dislocation emission and propagation | Grain boundary complexions have been observed to affect the mechanical
behavior of nanocrystalline metals, improving both strength and ductility.
While an explanation for the improved ductility exists, the observed effect on
strength remains unexplained. In this work, we use atomistic simulations to
explore the influen... | 1712.02829v2 |
2017-12-10 | Combining phase field crystal methods with a Cahn-Hilliard model for binary alloys | During phase transitions certain properties of a material change, such as
composition field and lattice-symmetry distortions. These changes are typically
coupled, and affect the microstructures that form in materials. Here, we
propose a 2D theoretical framework that couples a Cahn-Hilliard (CH) model
describing the com... | 1712.03503v1 |
2017-12-10 | Mid infrared two-photon absorption in a room-temperature extended-wavelength InGaAs photodetector | We investigate the nonlinear optical response of a commercial
extended-wavelength In$_{0.81}$Ga$_{0.19}$As photodetector. Degenerate
two-photon absorption in the mid-infrared range is observed at room temperature
using a quantum cascade laser emitting at $\lambda=4.5~\mu$m as the excitation
source. From the measured tw... | 1712.03580v1 |
2017-12-11 | Level spacing and Poisson statistics for continuum random Schrödinger operators | We prove a probabilistic level-spacing estimate at the bottom of the spectrum
for continuum alloy-type random Schr\"odinger operators, assuming
sign-definiteness of a single-site bump function and absolutely continuous
randomness. More precisely, given a finite-volume restriction of the random
operator onto a box of li... | 1712.03925v3 |
2017-12-19 | Alloy formation at the bottom and top Fe interfaces of Ti/Fe/Ti trilayers | The chemical mixing at the Fe-on-Ti and Ti-on-Fe, i.e. the bottom and top
interfaces of Fe in atomically deposited layers, were studied experimentally
and by molecular dynamics simulations of the layer growth. The basic structure
and chemical composition of the layers were explored in cross-sections using
transmission ... | 1712.06870v1 |
2017-12-19 | Strain-induced effects in the electronic and spin properties of a monolayer of ferromagnetic GdAg2 | We report on the structural, electronic and magnetic properties of a
monolayer of GdAg2, forming a moir\'e pattern on Ag(111). Combining scanning
tunneling microscopy and ab-initio spin-polarized calculations, we show that
the electronic band structure can be shifted linearly via thermal dependent
strain of the intra-l... | 1712.06974v1 |
2017-12-27 | Observation of Al41Sm5: new evidence for structural hierarchy in Al-Sm alloys | Using an effective genetic algorithm, we uncover the structure of a
metastable Al41Sm5 phase that supplements its family sharing similar
short-range orders. The phase evolves upon heating an amorphous Al-9.7at.%Sm
ribbon, produced by melt-spinning. The dynamical phase selection is discussed
with respect to the structur... | 1712.09638v1 |
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