publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
|---|---|---|---|
1999-06-18 | First-Order Phase Transition in a Quantum Hall Ferromagnet | The single-particle energy spectrum of a two-dimensional electron gas in a
perpendicular magnetic field consists of equally-spaced spin-split Landau
levels, whose degeneracy is proportional to the magnetic field strength. At
integer and particular fractional ratios between the number of electrons and
the degeneracy of ... | 9906294v4 |
2000-01-19 | Microscopic self-consistent theory of Josephson junctions including dynamical electron correlations | We formulate a fully self-consistent, microscopic model to study the
retardation and correlation effects of the barrier within a Josephson junction.
The junction is described by a series of planes, with electronic correlation
included through a local self energy for each plane. We calculate current-phase
relationships ... | 0001269v1 |
2000-10-31 | Lattice Resistance and Peierls Stress in Finite-size Atomistic Dislocation Simulations | Atomistic computations of the Peierls stress in fcc metals are relatively
scarce. By way of contrast, there are many more atomistic computations for bcc
metals, as well as mixed discrete-continuum computations of the Peierls-Nabarro
type for fcc metals. One of the reasons for this is the low Peierls stresses in
fcc met... | 0010503v1 |
2000-12-04 | Semiconducting Characteristics of Magnesium-Doped Al2O3 Single Crystals | DC and AC electrical measurements were performed to investigate the
electrical conductivity of alpha-Al2O3:Mg samples with different concentrations
of [Mg]^0 centers .The concentration of [Mg]^0 centers was monitored by the
opticalabsorption peak at 2.56 eV. At low electrical fields, DC measurements
reveal blocking con... | 0012037v1 |
2001-04-10 | Electron-vibration coupling constants in positively charged fullerene | Recent experiments have shown that C60 can be positively field-doped. In that
state, fullerene exhibits a higher resistivity and a higher superconducting
temperature than the corresponding negatively doped state. A strong
intramolecular hole-phonon coupling, connected with the Jahn-Teller effect of
the isolated positiv... | 0104177v4 |
2001-06-08 | Efficient Switching and Domain Interlocking Observed in Polyaxial Ferroelectrics | We present in-situ transmission electron microscopy observations of domain
wall motion in thin freestanding potassium niobate single-crystals. We observe
that not all domains of a given polarization orientation are equally switchable
in applied electric fields. Tilted and curved 90 degree domain walls are common
and di... | 0106173v1 |
2001-10-18 | Weak localization in InSb thin films heavily doped with lead | The paper reports on the investigations of the weak localization (WL) effects
in 3D polycrystalline thin films of InSb. The films are closely compensated
showing the electron concentration n>10^{16} cm^{-3} at the total concentration
of the donor and acceptor type structural defects >10^{18} cm^{-3}. Unless
Pb-doped, t... | 0110367v1 |
2004-05-24 | Conductivity of DNA probed by conducting-atomic force microscopy: effects of contact electrode, DNA structure, surface interactions | We studied the electrical conductivity of DNA molecules with conducting
atomic force microscopy as a function of the chemical nature of the substrate
surfaces, the nature of the electrical contact, and the number of DNA molecules
(from a few molecules, to ropes and large fibers containing up to ~ 106
molecules). Indepe... | 0405547v1 |
2004-10-21 | Realization of an N-shaped IVC of nanoscale metallic junctions using the antiferromagnetic transition | We have observed at low temperatures (<8K) hysteretic I(V) characteristics
for sub-mkm (~200nm) metallic break-junctions based on the heavy-fermion
compound UPd2Al3. Degrading the quality of the contacts by in situ increasing
the local residual resistivity or temperature rise reduces the hysteresis. We
demonstrate that... | 0410535v1 |
2005-01-12 | Current induced magnetization switching in exchange biased spin-valves for CPP-GMR heads | In contrast to earlier studies performed on simple Co/Cu/Co sandwiches, we
have investigated spin transfer effects in complex spin-valve pillars with a
diameter of 130nm developed for current-perpendicular to the plane (CPP)
magneto-resistive heads. The structure of the samples included an exchange
biased synthetic pin... | 0501281v1 |
2005-05-10 | The static and dynamic conductivity of warm dense Aluminum and Gold calculated within a density functional approach | The static resistivity of dense Al and Au plsmas are calculated where all the
needed inputs are obtained from density functional theory (DFT). This is used
as input for a study of the dynamic conductivity. These calculations involve a
self-consistent determination of (i) the equation of state (EOS) and the
ionization b... | 0505226v1 |
2005-07-05 | Valence instability of cerium under pressure in the Kondo-like perovskite La$_{0.1}$Ce$_{0.4}$Sr$_{0.5}$MnO$_3$ | Effect of hydrostatic pressure and magnetic field on electrical resistance of
the Kondo-like perovskite manganese oxide,
La$_{0.1}$Ce$_{0.4}$Sr$_{0.5}$MnO$_3$ with a ferrimagnetic ground state, have
been investigated up to 2.1 GPa and 9 T. In this compound, the Mn-moments
undergo double exchange mediated ferromagnetic ... | 0507094v1 |
2005-08-22 | Magnetoresistance, specific heat and magnetocaloric effect of equiatomic rare-earth transition-metal magnesium compounds | We present a study of the magnetoresistance, the specific heat and the
magnetocaloric effect of equiatomic $RET$Mg intermetallics with $RE = {\rm
La}$, Eu, Gd, Yb and $T = {\rm Ag}$, Au and of GdAuIn. Depending on the
composition these compounds are paramagnetic ($RE = {\rm La}$, Yb) or they
order either ferro- or anti... | 0508528v1 |
2006-01-19 | Quantum supercurrent transistors in carbon nanotubes | Electronic transport through nanostructures is greatly affected by the
presence of superconducting leads. If the interface between the nanostructure
and the superconductors is sufficiently transparent, a dissipationless current
(supercurrent) can flow through the device due to the Josephson effect. A
Josephson coupling... | 0601434v1 |
2006-03-17 | Comment on 'Hysteresis, Switching, and Negative Differential Resistance in Molecular Junctions: a Polaron Model', by M. Galperin, M.A. Ratner, and A. Nitzan, Nano Lett. 5, 125 (2005) | It is shown that the ``hysteresis'' in a polaron model of electron transport
through the molecule found by M.Galperin et al. [Nano Lett. 5, 125 (2005)] is
an artefact of their ``mean-field'' approximation. The reason is trivial: after
illegitimate replacement $\hat{n}^{2}=\hat{n}n_{0},$ where \hat{n} is the
electron nu... | 0603467v3 |
2006-09-10 | Magnetic and magnetoresistance behavior of Tb7Rh3, an intermetallic compound with a negative temperature coefficient of electrical resistivity in the paramagnetic state, and Paramagnetic Giant Magnetoresistance Phenomenon | The results of dc magnetization, electrical and magnetoresistance and heat
capacity measurements (2-300 K) on Tb7Rh3, crystallizing in Th7Fe3-type
hexagonal structure, are reported. In this compound, magnetic ordering sets in
around 90 K with additional transitions at low temperatures and the temperature
coefficient of... | 0609231v1 |
2007-03-29 | Easy-plane magnetocrystalline anisotropy in the multi-step metamagnet CeIr3Si2 | Highly anisotropic properties of CeIr$_3$Si$_2$ have been observed by the
magnetization $M$($B$), electrical resistivity $\rho$, and specific heat
measurements on a single-crystalline sample. This compound with an orthorhombic
structure having zigzag chains of Ce ions along the a-axis undergos magnetic
transitions at 3... | 0703776v1 |
2004-01-28 | Matter and Light in Flatland | Using a non-material current through three new dimensions. It was possible to
build a particle-space model (a higher dimensional object intersecting a lower
dimensional world). The new dimensions solve the old problem of equal sign
walls huge electric repulsion force in the electric sphere model, since these
curved dim... | 0401153v1 |
2007-05-09 | Inter comparison of the magneto transport of La2/3Ca1/3MnO3: Ag/In polycrystalline composites | In this article, we report the synthesis, magneto transport features, and
magnetization of polycrystalline La2/3Ca1/3MnO3:Agx/Inx composites with x = 0,
0.1, 0.2, 0.3 and 0.4. In case of Ag the temperature coefficient of resistance
(TCR) near ferromagnetic (FM) transition enhances significantly with addition
of Ag. The... | 0705.1212v1 |
2007-12-12 | Magnetic anomalies in single crystalline ErPd2Si2 | Considering certain interesting features in the previously reported 166Er
Moessbauer effect and neutron diffraction data on the polycrystalline form of
ErPd2Si2 crystallizing in ThCr2Si2-type tetragonal structure, we have carried
out magnetic measurements (1.8 to 300 K) on the single crystalline form of this
compound. ... | 0712.2002v1 |
2008-11-14 | Reduction of the field-dependent microwave surface resistance in YBa_2Cu_3O_7 with sub-micrometric BaZrO_3 inclusions as a function of BaZrO_3 concentration | In order to study the vortex pinning determined by artificially introduced
pinning centers in the small-vortex displacement regime, we measured the
microwave surface impedance at 47.7 GHz in the mixed state of
YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ thin films, where sub-micrometric BaZrO$_3$
particles have been incorporated. ... | 0811.2351v1 |
2008-12-12 | Diffusive Charge Transport in Graphene on SiO2 | We review our recent work on the physical mechanisms limiting the mobility of
graphene on SiO2. We have used intentional addition of charged scattering
impurities and systematic variation of the dielectric environment to
differentiate the effects of charged impurities and short-range scatterers. The
results show that c... | 0812.2504v1 |
2008-12-22 | Magnetoresistance in paramagnetic heavy fermion metals | A theoretical study of magnetic field (h) effects on single-particle spectra
and transport quantities of heavy fermion metals in the paramagnetic phase is
carried out. We have employed a non-perturbative local moment approach (LMA) to
the asymmetric periodic Anderson model within the dynamical mean field
framework. The... | 0812.4101v2 |
2009-01-28 | Magnetic, Thermal, and Transport Properties of Layered Arsenides BaRu2As2 and SrRu2As2 | The magnetic, thermal and transport properties of polycrystalline BaRu2As2
and SrRu2As2 samples with the ThCr2Si2 structure were investigated by means of
magnetic susceptibility chi(T), electrical resistivity rho(T), and heat
capacity Cp(T) measurements. The temperature (T) dependence of rho indicates
metallic characte... | 0901.4582v2 |
2009-12-03 | Two and single superconductive capacitor paradox | In this work we consider a new version of the remarkable two capacitor
paradox, concretely its simpler form called single capacitor paradox in
realistic case when all capacitors plates, conductors and switch are made by
the same kind of superconductive material. In non-superconductive regime (when
temperature is larger... | 0912.0648v6 |
2010-01-05 | Spatial and frequency dependencies of local photoresponse of HTS strip-line resonator in regime of two-tone microwave intermodulation excitation | A new phenomenological approach to spatially-resolved research of nonlinear
(NL) microwave properties of operating thin-film superconducting resonators is
proposed. The approach is based on frequency and spatial singularity of Laser
Scanning Microscopy (LSM) images that can be extracted from a set of 2-D
patterns repre... | 1001.0677v1 |
2010-02-18 | Growth and characterization of epitaxial LuNi2B2C thin films on MgO single crystals | Biaxially textured LuNi2BC thin films with Tc up to 15.8 K and a residual
resistivity ratio up to 15 have been prepared. The films were deposited on
MgO(110) substrates using pulsed laser deposition from a stoichiometric target.
Via the precise control of the deposition rate, a biaxial texture is favored
within a broad... | 1002.3584v2 |
2010-02-19 | Uniaxial strain detwinning of CaFe2As2 and BaFe2As2: optical and transport study | TThe parent compounds of iron-arsenide superconductors, $A$Fe$_{2}$As$_{2}$
($A$=Ca, Sr, Ba), undergo a tetragonal to orthorhombic structural transition at
a temperature $T_{\mathrm{TO}}$ in the range 135 to 205K depending on the
alkaline earth element. Below $T_{\mathrm{TO}}$ the free standing crystals
split into equa... | 1002.3801v3 |
2010-10-14 | Pressure dependence of Curie temperature and resistivity in complex Heusler alloys | Using first-principles electronic structure calculations, we have studied the
dependence of the Curie temperature on external hydrostatic pressure for random
Ni2MnSn Heusler alloys doped with Cu and Pd atoms, over the entire range of
dopant concentrations. The Curie temperatures are calculated by applying
random-phase ... | 1010.3025v2 |
2010-12-25 | Charge inhomogeneities and transport in semiconductor heterostructures with a manganese $δ$-layer | We study experimentally and theoretically the effects of disorder, nonlinear
screening, and magnetism in semiconductor heterostructures containing a
$\delta$-layer of Mn, where the charge carriers are confined within a quantum
well and hence both ferromagnetism and transport are two-dimensional (2D) and
differ qualitat... | 1012.5456v1 |
2011-02-11 | Mutual Friction in Superfluid He^4 Near the λ-line | We present experimental results for the thermal resistivity {\rho} of
superfluid He^4 along several isobars between saturated vapor pressure and the
melting pressure. The measurements are for the temperature range 1 -
T_c(q)/T_{\lambda} < t < 2{\times}10^{-5} and the heat-flux range 3 < q < 70
{\mu}W/cm^2. Here t {\equ... | 1102.2373v1 |
2011-03-10 | Buckling instability of a thin-layer rectilinear Couette flow | We analyse the buckling stability of a thin, viscous sheet when subject to
simple shear, providing conditions for the onset of the dominant out-of-plane
modes using two models: (i) an asymptotic theory for the dynamics of a viscous
plate and (ii) the full Stokes equations. In either case, the plate is
stabilised by a c... | 1103.1925v1 |
2011-08-03 | Origin of conductivity cross over in entangled multi-walled carbon nanotube network filled by iron | A realistic transport model showing the interplay of the hopping transport
between the outer shells of iron filled entangled multi-walled carbon nanotubes
(MWNT) and the diffusive transport through the inner part of the tubes, as a
function of the filling percentage, is developed. This model is based on
low-temperature... | 1108.0881v1 |
2011-08-24 | Carrier-independent ferromagnetism and giant anomalous Hall effect in magnetic topological insulator | Breaking the time-reversal symmetry of a topological insulator (TI) by
ferromagnetism can induce exotic magnetoelectric phenomena such as quantized
anomalous Hall (QAH) effect. Experimental observation of QAH effect in a
magnetically doped TI requires ferromagnetism not relying on the charge
carriers. We have realized ... | 1108.4754v2 |
2011-09-10 | Role of ambient air on photoluminescence and electrical conductivity of assembly of ZnO Nanoparticles | Effect of ambient gases on photoluminescence (PL) and electrical conductivity
of films prepared using ZnO nanoparticles (NPs) have been investigated. It is
observed that NPs of size below 20 nm kept inside a chamber exhibit complete
reduction in their visible PL when oxygen partial pressure of the surrounding
gases is ... | 1109.2253v1 |
2011-10-07 | Reversible metal-insulator transition in LaAlO3 thin films mediated by intragap defects: An alternative mechanism for resistive switching | We report on the electric-field-induced reversible metal-insulator transition
(MIT) of the insulating LaAlO3 thin films observed in metal/LaAlO3/Nb-SrTiO3
heterostructures. The switching voltage depends strongly on the thickness of
the LaAlO3 thin film which indicates that a minimum thickness is required for
the MIT. A... | 1110.1595v1 |
2012-02-07 | Effect of internal chemical pressure on transport properties and TCR for sensors applications | In this work, the structural and transport properties of
(Nd0.7-xLax)Sr0.3MnO3 manganites with x = 0, 0.1 and 0.2 prepared by solid
state reaction route are studied. These compounds are found to be crystallized
in orthorhombic structural form. The influence of La substitution in place of
Nd at A-site shifts the metal t... | 1202.1355v1 |
2012-07-02 | Evolution of superconducting correlations within magnetic-field-decoupled CuO(2) layers of La(1.905)Ba(0.095)CuO(4) | We explore the evolution of superconductivity in La(2-x)Ba(x)CuO(4) with
x=0.095 in magnetic fields of up to 35 T applied perpendicular to the CuO(2)
planes. Previous work on this material has shown that perpendicular fields
enhance both charge and spin stripe order within the planes. We present
measurements of the res... | 1207.0528v2 |
2012-07-26 | Kinetic impedance and depairing in thin and narrow superconducting films | We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to calculate
the superfluid's temperature-dependent kinetic inductance for all currents up
to the depairing current in thin and narrow superconducting films. The
calculations apply to BCS weak-coupling superconductors with isotropic gaps and
transport mean-... | 1207.6421v2 |
2012-11-27 | Electronic phase separation due to magnetic polaron formation in the semimetallic ferromagnet EuB$_6$ - A weakly-nonlinear-transport study | We report measurements of weakly nonlinear electronic transport, as measured
by third-harmonic voltage generation $V_{3\omega}$, in the low-carrier density
semimetallic ferromagnet EuB$_6$, which exhibits an unusual magnetic ordering
with two consecutive transitions at $T_{c_1} = 15.6$\,K and $T_{c_2} =
12.5$\,K. Upon ... | 1211.6305v1 |
2013-04-05 | Anisotropic Magneto Resistance and Planar Hall Effect at the LaAlO$_3$/SrTiO$_3$ Heterointerfaces: Effect of Carrier Confinement on Magnetic Interactions | The confinement of the two dimensional electron gas (2DEG), preferential
occupancy of the Ti 3d orbital and strong spin-orbit coupling at the
LaAlO$_3$/SrTiO$_3$ interface play a significant role in its emerging
properties. Here we report a fourfold oscillation in the anisotropic magneto
resistance (AMR) and the observ... | 1304.1619v1 |
2013-09-24 | Wiedemann-Franz law and non-vanishing temperature scale across the field-tuned quantum critical point of YbRh2Si2 | The in-plane thermal conductivity kappa(T) and electrical resistivity rho(T)
of the heavy-fermion metal YbRh2Si2 were measured down to 50 mK for magnetic
fields H parallel and perpendicular to the tetragonal c axis, through the
field-tuned quantum critical point, Hc, at which antiferromagnetic order ends.
The thermal a... | 1309.6315v1 |
2014-03-01 | Sudden reversal in the pressure dependence of Tc in the iron-based superconductor CsFe2As2: A possible link between inelastic scattering and pairing symmetry | We report a sudden reversal in the pressure dependence of Tc in the
iron-based superconductor CsFe2As2, similar to that discovered recently in
KFe2As2 [Tafti et al., Nat. Phys. 9, 349 (2013)]. As in KFe2As2, we observe no
change in the Hall coefficient at the zero temperature limit, again ruling out
a Lifshitz transiti... | 1403.0110v3 |
2014-03-18 | Superconductivity and Physical Properties of CaPd2Ge2 Single Crystals | We present the superconducting and normal state properties of CaPd2Ge2 single
crystal investigated by magnetic susceptibility \chi, isothermal magnetization
M, heat capacity C_p, in-plane electrical resistivity \rho and London
penetration depth \lambda versus temperature T and magnetic field H
measurements. Bulk superc... | 1403.4595v1 |
2014-05-23 | Bio-inspired design of ice-retardant devices based on benthic marine invertebrates: the effect of surface texture | Growth of ice on surfaces poses a challenge for both organisms and for
devices that come into contact with liquids below the freezing point.
Resistance of some organisms to ice formation and growth, either in subtidal
environments (e.g. Antarctic anchor ice), or in environments with moisture and
cold air (e.g. plants, ... | 1405.6048v2 |
2014-06-16 | Tunable Semimetallic State in Compressive-strained SrIrO3 Films Revealed by Transport Behaviors | Orthorhombic SrIrO3 is a typical spin-orbit-coupling correlated metal that
shows diversified physical properties under the external stimuli. Here
nonlinear Hall effect and weakly temperature-dependent resistance are observed
in a SrIrO3 film epitaxially grown on SrTiO3 substrate. It infers that
orthorhombic SrIrO3 is a... | 1406.3878v2 |
2014-06-17 | Magnetic and transport properties of i-$R$-Cd icosahedral quasicrystals ($R$ = Y, Gd-Tm) | We present a detailed characterization of the recently discovered i-$R$-Cd
($R$ = Y, Gd-Tm) binary quasicrystals by means of x-ray diffraction,
temperature-dependent dc and ac magnetization, temperature-dependent resistance
and temperature-dependent specific heat measurements. Structurally, the
broadening of x-ray diff... | 1406.4522v1 |
2014-07-16 | Velocity-strengthening friction significantly affects interfacial dynamics, strength and dissipation | Frictional interfaces are abundant in natural and manmade systems and their
dynamics still pose challenges of fundamental and technological importance. A
recent extensive compilation of multiple-source experimental data has revealed
that velocity-strengthening friction, where the steady-state frictional
resistance incr... | 1407.4253v1 |
2014-09-11 | Quantum Hall Effect on Top and Bottom Surface States of Topological Insulator (Bi1-xSbx)2Te3 Films | The three-dimensional (3D) topological insulator (TI) is a novel state of
matter as characterized by two-dimensional (2D) metallic Dirac states on its
surface. Bi-based chalcogenides such as Bi2Se3, Bi2Te3, Sb2Te3 and their
combined/mixed compounds like Bi2Se2Te and (Bi1-xSbx)2Te3 are typical members
of 3D-TIs which ha... | 1409.3326v1 |
2014-09-22 | Crystal growth and magnetic properties of equiatomic CeAl | Single crystal of CeAl has been grown by flux method using Ce-Al self-flux.
Several needle like single crystals were obtained and the length of the needle
corresponds to the [001] crystallographic direction. Powder x-ray diffraction
revealed that CeAl crystallizes in orthorhombic CrB-type structure with space
group ${C... | 1409.6079v1 |
2014-09-29 | Verwey transition in Fe$_{3}$O$_{4}$ thin films: Influence of oxygen stoichiometry and substrate-induced microstructure | We have carried out a systematic experimental investigation to address the
question why thin films of Fe$_3$O$_4$ (magnetite) generally have a very broad
Verwey transition with lower transition temperatures as compared to the bulk.
We observed using x-ray photoelectron spectroscopy, x-ray diffraction and
resistivity me... | 1409.8195v1 |
2014-12-02 | Structural, electrical and magnetic properties of nanostructured Mn2Ni1.6Sn0.4 melt spun ribbons | Nanocrystalline ribbons of inverse Heusler alloy Mn2Ni1.6Sn0.4 have been
synthesised by melt spinning of the arc melted bulk precursor. The single phase
ribbons crystallize into a cubic structure and exhibit very fine crystallite
size of < 2 nm. Temperature dependent magnetization (M-T) measurements reveal
that austeni... | 1412.0859v1 |
2015-02-01 | Enhanced conduction band density of states in intermetallic EuTSi$_3$ (T=Rh, Ir) | We report on the physical properties of single crystalline EuRhSi$_3$ and
polycrystalline EuIrSi$_3$, inferred from magnetisation, electrical transport,
heat capacity and $^{151}$Eu M\"ossbauer spectroscopy. These previously known
compounds crystallise in the tetragonal BaNiSn$_3$-type structure. The single
crystal mag... | 1502.00285v1 |
2015-09-02 | Shear-induced rigidity of frictional particles: Analysis of emergent order in stress space | Solids are distinguished from fluids by their ability to resist shear. In
traditional solids, the resistance to shear is associated with the emergence of
broken translational symmetry as exhibited by a non-uniform density pattern,
which results from either minimizing the energy cost or maximizing the entropy
or both. I... | 1509.00678v2 |
2015-09-15 | Domain-resolved room-temperature magneto-electric coupling in manganite-titanate heterostructures | We present a model artificial multiferroic system consisting of a
(011)-oriented ferroelectric Pb(Mg,Nb,Ti)O$_3$ substrate intimately coupled to
a ferromagnetic (La,Sr)MnO$_3$ film through epitaxial strain and converse
piezoelectric effects. Electric field pulse sequences of less than 6 kV/cm were
shown to induce large... | 1509.04775v1 |
2015-11-05 | Characteristics of undulatory locomotion in granular media | Undulatory locomotion is ubiquitous in nature and observed in different
media, from the swimming of flagellated microorganisms in biological fluids, to
the slithering of snakes on land, or the locomotion of sandfish lizards in
sand. Despite the similarity in the undulating pattern, the swimming
characteristics depend o... | 1511.01925v1 |
2016-02-19 | Heat transport study of field-tuned quantum criticality in CeIrIn5 | The in-plane electrical resistivity, rho, and thermal conductivity, kappa, of
the heavy-fermion superconductor CeIrIn5 were measured down to 40mK in magnetic
fields up to 11 T applied along the c axis. For all fields above Hc2=4T of
filamentary superconductivity, we find that the ratio of heat and charge
conductivities... | 1602.06311v1 |
2016-02-26 | Spin dynamics, electronic and thermal transport properties of two-dimensional CrPS4 single crystal | 2-Dimensional (2D) CrPS4 single crystals have been grown by the chemical
vapor transport method. The crystallographic, magnetic, electronic and thermal
transport properties of the single crystals were investigated by the
room-temperature X-ray diffraction, electrical resistivity \r{ho}(T), specific
heat CP(T) and the e... | 1602.08174v1 |
2016-05-25 | Probing chiral superconductivity in Sr$_{2}$RuO$_{4}$ underneath the surface by point contact measurements | Sr$_{2}$RuO$_{4}$ (SRO) is the prime candidate for chiral $p$-wave
superconductor with critical temperature $T_{c}(SRO)\sim$1.5 K. Chiral domains
with opposite chiralities $p_{x}\pm ip_{y}$ were proposed, but yet to be
confirmed. We measure the field dependence of the point contact (PC) resistance
between a tungsten ti... | 1605.07712v2 |
2016-05-27 | The role of ion transport phenomena in memristive double barrier devices | In this work we report on the role of ion transport for the dynamic behavior
of a double barrier quantum mechanical
Al/Al$_2$O$_3$/Nb$_{\text{x}}$O$_{\text{y}}$/Au memristive device based on
numerical simulations in conjunction with experimental measurements. The device
consists of an ultra-thin Nb$_{\text{x}}$O$_{\tex... | 1605.08564v2 |
2016-05-27 | Space Charge Limited Current with Self-heating in Pr$_{0.7}$Ca$_{0.3}$MnO$_3$ based RRAM | Space Charge Limited Current (SCLC) based conduction has been identified for
PCMO-based RRAM devices based on the observation that $I \propto V^{\alpha}$
where $\alpha \approx 2$. A critical feature of the IV characteristics is a
sharp rise in current ($\alpha \gg 2$) which has been widely attributed to
trap-filled lim... | 1605.08755v1 |
2016-07-23 | Influence of Al-doping on the structural, magnetic, and electrical properties of La$_{1-x}$Ba$_x$Mn$_{1-x}$Al$_x$O$_3$ ($0\leq x \leq 0.25$) manganites | We have studied the effect of Al doping on the structural, magnetic and
electrical properties of La$_{1-x}$Ba$_x$Mn$_{1-x}$Al$_x$O$_3$ ($0\leq x \leq
0.25$) manganite, annealed in two 750$^oC$ and 1350$^oC$ temperatures. The XRD
analysis shows that the structures in all samples have single phase
rhombohedral structure ... | 1607.06908v1 |
2016-08-07 | Imaging Electron Motion in a Few Layer MoS2 Device | Ultrathin sheets of MoS2 are a newly discovered 2D semiconductor that holds
great promise for nanoelectronics. Understanding the pattern of current flow
will be crucial for developing devices. In this talk, we present images of
current flow in MoS2 obtained with a Scanned Probe Microscope (SPM) cooled to 4
K. We previo... | 1608.02250v1 |
2016-10-07 | Surface Conductivity of Si(100) and Ge(100) Surfaces Determined from Four-Point Transport Measurements Using an Analytical N-Layer Conductance Model | An analytical N-layer model for charge transport close to a surface is
derived from the solution of Poisson's equation and used to describe
distance-dependent electrical four-point measurements on the microscale. As the
N-layer model comprises a surface channel, multiple intermediate layers and a
semi-infinite bulk, it... | 1610.02239v1 |
2016-11-28 | Graphene Contacts to a HfSe2/SnS2 Heterostructure | Placing graphene on SnS2 results in significant charge transfer, on the order
of 10^13/cm^2, from the graphene to the SnS2, and the charge transfer results
in a negative Schottky barrier contact for electron injection from the graphene
into the SnS2 conduction band. However, due to the s-px,y composition of the
SnS2 co... | 1611.08941v1 |
2016-12-07 | Magnetoresistance of compensated semimetals in confined geometries | Two-component conductors -- e.g., semi-metals and narrow band semiconductors
-- often exhibit unusually strong magnetoresistance in a wide temperature
range. Suppression of the Hall voltage near charge neutrality in such systems
gives rise to a strong quasiparticle drift in the direction perpendicular to
the electric c... | 1612.02439v2 |
2017-02-10 | Mesoscopic transport in electrostatically-defined spin-full channels in quantum Hall ferromagnets | In this work we use electrostatic control of quantum Hall ferromagnetic
transitions in CdMnTe quantum wells to study electron transport through
individual domain walls (DWs) induced at a specific location. These DWs are
formed due to hybridization of two counter-propagating edge states with
opposite spin polarization. ... | 1702.03279v2 |
2017-06-06 | Structural, electronic, magnetic and transport properties of equiatomic quaternary Heusler Alloy CoRhMnGe: Theory and Experiment | In this work, we present structural, electronic, magnetic, mechanical and
transport properties of equiatomic quaternary Heusler alloy, CoRhMnGe using
both theoretical and experimental techniques. A detailed structural analysis is
performed using X-ray diffraction(XRD) and extended X-ray absorption fine
structure(EXAFS)... | 1706.01624v1 |
2017-06-14 | Impurity band conduction in group-IV ferromagnetic semiconductor Ge1-xFex with nanoscale fluctuations in Fe concentration | We study the carrier transport and magnetic properties of group-IV-based
ferromagnetic semiconductor Ge1-xFex thin films (Fe concentration x = 2.3 - 14
%) with and without boron (B) doping, by measuring their transport
characteristics; the temperature dependence of resistivity, hole concentration,
mobility, and the rel... | 1706.04445v2 |
2017-06-19 | Steady \& unsteady fluidised granular flows down slopes | Fluidisation is the process by which the weight of a bed of particles is
supported by a gas flow passing through it from below. When fluidised materials
flow down an incline, the dynamics of the motion differ from their
non-fluidised counterparts because the granular agitation is no longer required
to support the weigh... | 1706.05997v1 |
2017-06-28 | Origin of nonlocal resistance in multiterminal graphene on hexagonal-boron-nitride: Fermi surface edge currents rather than Fermi sea topological valley currents | The recent observation [R. V. Gorbachev et al., Science {\bf 346}, 448
(2014)] of nonlocal resistance $R_\mathrm{NL}$ near the Dirac point (DP) of
multiterminal graphene on aligned hexagonal boron nitride (G/hBN) has been
interpreted as the consequence of topological valley Hall currents carried by
the Fermi sea states... | 1706.09361v2 |
2017-09-15 | Reentrant Metallic Behavior in the Weyl Semimetal NbP | We report the occurrence of reentrant metallic behavior in the Weyl semimetal
NbP. When the applied magnetic field $H$ is above a critical value $H_c$, a
reentrance appears as a peak in the temperature dependent resistivity
$\rho_{xx}(T)$ at $T$ = $T_p$, similar to that observed in graphite where it
was attributed to l... | 1709.05041v1 |
2018-01-04 | Photocorrosion-limited maximum efficiency of solar photoelectrochemical water splitting | Photoelectrochemical (PEC) water splitting to generate hydrogen is one of the
most studied methods for converting solar energy into clean fuel because of its
simplicity and potentially low cost. Despite over 40 years of intensive
research, PEC water splitting remains in its early stages with stable
efficiencies far les... | 1801.01334v2 |
2018-01-09 | Advanced Environmentally Resistant Lithium Fluoride Mirror Coatings for the Next-Generation of Broadband Space Observatories | Recent advances in the physical vapor deposition (PVD) of protective fluoride
films have raised the far-ultraviolet (FUV: 912-1600 {\AA}) reflectivity of
aluminum-based mirrors closer to the theoretical limit. The greatest gains, at
more than 20%, have come for lithium fluoride-protected aluminum, which has the
shortes... | 1801.03102v1 |
2018-01-28 | Temperature-Dependence of the Solid-Electrolyte Interphase Overpotential: Part I. Two Parallel Mechanisms, One Phase Transition | It has been shown recently that the overpotential originating from ionic
conduction of alkali-ions through the inner dense solid-electrolyte interphase
(SEI) is strongly non-linear. An empirical equation was proposed to merge the
measured resistances from both galvanostatic cycling (GS) and electrochemical
impedance sp... | 1801.09676v1 |
2018-03-02 | Structures and Physical Properties of CsV$_2$Se$_{2-x}$O and V$_2$Se$_2$O | By using solid-state reactions, we successfully synthesize new oxyselenides
CsV$_2$Se$_{2-x}$O (x = 0, 0.5). These compounds containing V$_2$O planar
layers with a square lattice crystallize in the CeCr$_2$Si$_2$C structure with
the space group of $P4/mmm$. Another new compound V$_2$Se$_2$O which
crystallizes in space ... | 1803.00703v1 |
2018-02-21 | Optical Receiver with Helicity Dependent Switching of Magnetization | In this work, we propose helicity-dependent switching (HDS) of magnetization
of Co/Pt for energy efficient optical receiver. Designing a low power optical
receiver for optical-to-electrical signal conversion has proven to be very
challenging. Current day receivers use a photodiode that produces a
photocurrent in respon... | 1803.07148v1 |
2018-04-05 | Symmetry breaking and unconventional charge ordering in single crystal Na$_{2.7}$Ru$_4$O$_9$ | The interplay of charge, spin, and lattice degrees of freedom in matter leads
to various forms of ordered states through phase transitions. An important
subclass of these phenomena of complex materials is charge ordering (CO),
mainly driven by mixed-valence states. We discovered by combining the results
of electrical r... | 1804.02012v1 |
2018-06-08 | Interface chemical and electronic properties of LaAlO3/SrVO3 heterostructures | We have studied the chemical and electronic properties of LaAlO3/SrVO3
ultrathin films by combining hard x-ray photoemission spectroscopy and
transport measurements. We compare single SrVO3 (SVO) ultrathin films and SrVO3
buried below a polar LaAlO3 (LAO) thin layer, both epitaxially grown on SrTiO3.
While ultrathin fi... | 1806.03066v1 |
2018-06-20 | Unusual phonon density of states and response to the superconducting transition in the In-doped topological crystalline insulator Pb$_{0.5}$Sn$_{0.5}$Te | We present inelastic neutron scattering results of phonons in
(Pb$_{0.5}$Sn$_{0.5}$)$_{1-x}$In$_x$Te powders, with $x=0$ and 0.3. The $x=0$
sample is a topological crystalline insulator, and the $x=0.3$ sample is a
superconductor with a bulk superconducting transition temperature $T_c$ of 4.7
K. In both samples, we obs... | 1806.07531v1 |
2017-03-18 | Coexistence of non-Fermi liquid and Fermi liquid self-energies at all dopings in cuprates | Various angle-dependent measurements in hole-doped cuprates suggested that
Non-Fermi liquid (NFL) and Fermi-liquid (FL) self-energies coexist in the
Brillouin zone. Moreover, it is also found that NFL self-energies survive up to
the overdoped region where the resistivity features a global FL-behavior. To
address this p... | 1703.06280v4 |
2013-12-27 | Space charge dynamics in solid electrolytes with steric effect and Vegard stresses: resistive switching and ferroelectric-like hysteresis of electromechanical response | We performed self-consistent modelling of electrotransport and
electromechanical response of solid electrolyte thin films allowing for steric
effects of mobile charged defects (ions, protons or vacancies), electron
degeneration and Vegard stresses. We establish correlations between the
features of the space-charge dyna... | 1312.7300v1 |
2014-10-08 | Kondo-hole substitution in heavy fermions: dynamics and transport | Kondo-hole substitution is a unique probe for exploring the interplay of
interactions, f-electron dilution and disorder in heavy fermion materials.
Within the diluted periodic Anderson model, we investigate the changes in
single-particle dynamics as well as response functions, as a function of Kondo
hole concentration ... | 1410.2475v1 |
2016-06-01 | Combined effects of Sr substitution and pressure on the ground states in CaFe$_2$As$_2$ | We present a detailed study of the combined effects of Sr substitution and
hydrostatic pressure on the ground-state properties of CaFe$_2$As$_2$.
Measurements of the electrical resistance and magnetic susceptibility, both at
ambient and finite pressure $P$ $\leq$ 2$\,$GPa, were performed on
Ca$_{1-x}$Sr$_x$Fe$_2$As$_2$... | 1606.00141v1 |
2016-06-06 | Duality and reciprocity of fluctuation-dissipation relations in conductors | By analogy with linear-response we formulate the duality and reciprocity
properties of current and voltage fluctuations expressed by Nyquist relations
including the intrinsic bandwidths of the respective fluctuations. For this
purpose we individuate total-number and drift-velocity fluctuations of carriers
inside a cond... | 1606.01659v1 |
2017-01-25 | Evidence for an excitonic insulator phase in a zero-gap InAs/GaSb bilayer | Many-body interactions can produce novel ground states in a condensed-matter
system. For example, interacting electrons and holes can spontaneously form
excitons, a neutral bound state, provided that the exciton binding energy
exceeds the energy separation between the single particle states. Here we
report on electrica... | 1701.07417v1 |
2017-11-29 | Thermal contribution to the spin-orbit torque in metallic/ferrimagnetic systems | We report a systematic study of current-induced perpendicular magnetization
switching in W/Co$_{x}$Tb$_{1-x}$/Al thin films with strong perpendicular
magnetic anisotropy. Various Co$_{x}$Tb$_{1-x}$ ferrimagnetic alloys with
different magnetic compensation temperatures are presented. The systems are
characterized using ... | 1711.10790v1 |
2018-10-01 | Electrical detection of current generated spin in topological insulator surface states: Role of interface resistance | Current generated spin polarization in topological insulator (TI) surface
states due to spin-momentum locking has been detected recently using
ferromagnet/tunnel barrier contacts, where the projection of the TI spin onto
the magnetization of the ferromagnet is measured as a voltage. However,
opposing signs of the spin ... | 1810.00757v2 |
2018-10-24 | On the interactions of Ti${_2}$AlC, Ti${_3}$AlC${_2}$, Ti${_3}$SiC${_2}$ and Cr${_2}$AlC with palladium at 900 °C | Herein we report on the reactivity between palladium, Pd, and the MAX phases,
Ti${_2}$AlC, Ti${_3}$AlC${_2}$, Ti${_3}$SiC${_2}$ and Cr${_2}$AlC. Diffusion
couples of Pd/MAX were heated to 900 {\deg}C under uniaxial stress of ~20 MPa
for 2, 4, and 10 h in a vacuum (<1 Pa) hot press. The diffusion couples were
examined u... | 1811.00098v1 |
2018-11-27 | Thermoelectric properties of (Ba,K)Cd2As2 crystallized in the CaAl2Si2-type structure | As-Based Zintl compounds Ba1-xKxCd2As2 crystallized in the CaAl2Si2-type
structure (space group P3-m1) were prepared using solid-state reactions
followed by hot-pressing. We have successfully substituted K for Ba up to x =
0.08, producing hole-carrier doping with concentrations up to 1.60*1020 cm-3.
We have determined ... | 1811.10867v1 |
2018-11-29 | Application of an extended van der Pauw method to anisotropic magnetoresistance measurements of ferromagnetic films | We demonstrate anisotropic resistivity measurements using the extended van
der Pauw (vdP) method in ferromagnetic Ni80Fe20 (Py) films. We apply it to
measure anisotropic magnetoresistance (AMR) and compare the results of the vdP
method with the more conventional Hall-bar method along the hard and easy axis
of the film ... | 1811.12029v1 |
2019-05-27 | Unidirectional planar Hall voltages induced by surface acoustic waves in ferromagnetic thin films | The electromotive forces induced by surface acoustic waves (SAWs) are
investigated in ferromagnetic thin films. CoFeB thin films deposited on
LiNbO$_3$ substrates are patterned into Hall-bars to study the acoustoelectric
transport properties of the device. The longitudinal and transverse dc voltages
that develop in the... | 1905.11224v1 |
2019-07-04 | Thick adherent diamond films on AlN with low thermal barrier resistance | Growth of $>$100 $\mu$m thick diamond layer adherent on aluminium nitride is
presented in this work. While thick films failed to adhere on untreated AlN
films, hydrogen/nitrogen plasma treated AlN films retained the thick diamond
layers. Clear differences in zeta potential measurement confirms the surface
modification ... | 1907.02481v1 |
2019-07-23 | Electrical characteristics of vertical-geometry Schottky junction to magnetic insulator (Ga,Mn)N heteroepitaxially grown on sapphire | Schottky barrier height and the ideality factor $\eta$ are established for
the first time in the single phase (Ga,Mn)N using a vertical geometry device.
The material has been heteroepitaxially grown on commercially available low
threading dislocation density GaN:Si template. The observed above 10M$\Omega$
resistances a... | 1907.09757v1 |
2020-02-11 | Cation controlled wetting properties of vermiculite membranes and its potential for fouling resistant oil-water separation | The surface free energy is one of the most fundamental properties of solids,
hence, manipulating the surface energy and thereby the wetting properties of
solids, has tremendous potential for various physical, chemical, biological as
well as industrial processes. Typically, this is achieved by either chemical
modificati... | 2002.04522v1 |
2020-02-20 | Predictive Crystal Plasticity Modeling of Single Crystal Nickel Based on First-Principles Calculations | To reduce reliance on experimental fitting data within the crystal plasticity
finite element method (CPFEM), an approached is proposed that integrates
first-principles calculations based on density functional theory (DFT) to
predict the strain hardening behavior of pure Ni single crystals. Flow
resistance was evaluated... | 2002.08552v5 |
2020-03-13 | Structural, magnetic and insulator-to-metal transitions under pressure in the GaV4S8 Mott insulator: A rich phase diagram up to 14.7 GPa | In addition to its promising potential for applications, GaV4S8 shows very
interesting physical properties with temperature and magnetic field. These
properties can be tuned by applying hydrostatic pressure in order to reveal and
understand the physics of these materials. Not only pressure induces an
insulator-to-metal... | 2003.06358v1 |
2020-03-26 | Sub-THz momentum drag and violation of Matthiessen's rule in an ultraclean ferromagnetic SrRuO$_3$ metallic thin film | SrRuO$_3$, a ferromagnet with an approximately 160\,K Curie temperature,
exhibits a $T^2$ dependent dc resistivity below $\approx$ 30 K. Nevertheless,
previous optical studies in the infrared and terahertz range show non-Drude
dynamics at low temperatures which seem to contradict a Fermi-liquid picture
with long-lived ... | 2003.12024v1 |
2020-09-07 | Effect of interface resistance on thermoelectric properties in (1-x)La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$/(x)WC composite | In this study, the synergistic effect of the particle size of the dispersed
phase and the interface thermal resistance (R$_{int}$) between the phases on
the phonon thermal conductivity ($\kappa_{ph}$) of the
(1-x)La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$/(x)WC thermoelectric
composite, is demonstrated. Further,... | 2009.03236v3 |
2020-09-24 | Phonon hydrodynamics in crystalline GeTe at low temperature | A first-principles density functional method along with the direct solution
of linearized Boltzmann transport equations are employed to systematically
analyze the low-temperature thermal transport in crystalline GeTe. The
extensive thermal transport simulations, ranging from room temperature to
cryogenic temperatures, ... | 2009.11962v1 |
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