publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
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2015-01-07 | Semimetallic transport properties of epitaxially stabilized perovskite CaIrO3 films | We report on the synthesis and transport properties of perovskite (Pv) CaIrO3
thin films. The Pv phase of CaIrO3 was stabilized by epitaxial growth on
SrTiO3, (LaAlO3)0.3(Sr2AlTaO6)0.7, and LaAlO3 substrates with strong tensile,
weak tensile, and compressive strains, respectively. The resistivity of these
films showed ... | 1501.01433v1 |
2015-02-13 | Surface state reconstruction in ion-damaged SmB_6 | We have used ion-irradiation to damage the (001) surfaces of SmB_6 single
crystals to varying depths, and have measured the resistivity as a function of
temperature for each depth of damage. We observe a reduction in the residual
resistivity with increasing depth of damage. Our data are consistent with a
model in which... | 1502.04103v1 |
2015-02-19 | Occurrence of flat bands in strongly correlated Fermi systems and high-$T_c$ superconductivity of electron-doped compounds | We consider a class of strongly correlated Fermi systems that exhibit an
interaction-induced flat band pinned to the Fermi surface, and generalize the
Landau strategy to accommodate a flat band and apply the more comprehensive
theory to electron systems of solids. The non-Fermi-liquid behavior that
emerges is compared ... | 1502.05659v2 |
2015-03-05 | Optical study of phase transitions in single-crystalline RuP | RuP single crystals of MnP-type orthorhombic structure were synthesized by
the Sn flux method. Temperature-dependent x-ray diffraction measurements reveal
that the compound experiences two structural phase transitions, which are
further confirmed by enormous anomalies shown in temperature-dependent
resistivity and magn... | 1503.01544v1 |
2015-03-25 | Nature of magnetotransport in metal/insulating-ferromagnet heterostructures: Spin Hall magnetoresistance or magnetic proximity effect | We study the anomalous Hall-like effect (AHLE) and the effective anisotropic
magnetoresistance (EAMR) in antiferromagnetic {\gamma} -IrMn3/Y3Fe5O12(YIG) and
Pt/YIG heterostructures. For {\gamma} -IrMn3/YIG, the EAMR and the AHLE
resistivity change sign with temperature due to the competition between the
spin Hall magne... | 1503.07388v2 |
2015-03-31 | Persistence of two-dimensional topological insulator state in wide HgTe quantum well | Our experimental studies of electron transport in wide (14 nm) HgTe quantum
wells confirm persistence of a two-dimensional topological insulator state
reported previously for narrower wells, where it was justified theoretically.
Comparison of local and nonlocal resistance measurements indicate edge state
transport in t... | 1503.08978v1 |
2015-05-19 | Frequency-Independent Response of Self-Complementary Checkerboard Screens | This research resolves a long-standing problem on the electromagnetic
response of self-complementary metallic screens with checkerboardlike geometry.
Although Babinet's principle implies that they show a frequency-independent
response, this unusual characteristic has not been observed yet due to the
singularities of th... | 1505.04874v2 |
2015-05-22 | Greedy Biomarker Discovery in the Genome with Applications to Antimicrobial Resistance | The Set Covering Machine (SCM) is a greedy learning algorithm that produces
sparse classifiers. We extend the SCM for datasets that contain a huge number
of features. The whole genetic material of living organisms is an example of
such a case, where the number of feature exceeds 10^7. Three human pathogens
were used to... | 1505.06249v1 |
2015-09-07 | Optimization of Spatial Dose Distribution for Controlling Sidewall Shape in Electron-beam Lithography | Electron-beam (e-beam) lithography is widely employed in fabrication of 2-D
patterns and 3-D structures. A certain type or shape of the sidewall in the
remaining resist profile may be desired in an application, e.g., an undercut
for lift-off and a vertical sidewall for etching, or required for a device.
Also, as the fe... | 1509.04694v1 |
2015-10-05 | Magnetic oscillations of the anomalous Hall conductivity | It is known that the Shubnikov--de Haas oscillations can be observed in the
Hall resistivity, although their amplitude is much weaker than the amplitude of
the diagonal resistivity oscillations. Employing a model of two-dimensional
massive Dirac fermions that exhibits anomalous Hall effect, we demonstrate that
the ampl... | 1510.01360v2 |
2015-10-12 | Weak ferromagnetism in non-centrosymmetric BiPd 4K superconductor | We report synthesis of non-centrosymmetric BiPd single crystal by self flux
method. The BiPd single crystal is crystallized in monoclinic structure with
the P21 space group. Detailed SEM (Scanning Electron Microscopy) results show
that the crystals are formed in slab like morphology with homogenous
distribution of Bi a... | 1510.03217v2 |
2015-11-25 | Andreev reflection at the edge of a two-dimentional semimetal | We investigate electron transport through the interface between a niobium
superconductor and the edge of a two-dimensional semimetal, realized in a 20~nm
wide HgTe quantum well. Experimentally, we observe that typical behavior of a
single Andreev contact is complicated by both a pronounced zero-bias resistance
anomaly ... | 1511.08085v1 |
2015-12-12 | Low Temperature Structural and Transport Studies of La0.175Pr0.45Ca0.375MnO3 | The temperature (T) dependent x-ray diffraction (XRD) and resistivity
measurements of La0.175Pr0.45Ca0.375MnO3 (LPCMO) have been performed down to 2K
to understand the structural and transport properties. From room temperature
down to 220K, LPCMO exists in orthorhombic phase with Pnma structure and at
220K, it transfor... | 1512.03890v1 |
2015-12-17 | A self-consistent spin-diffusion model for micromagnetics | We propose a three-dimensional micromagnetic model that dynamically solves
the Landau-Lifshitz-Gilbert equation coupled to the full spin-diffusion
equation. In contrast to previous methods, we solve for the magnetization
dynamics and the electric potential in a self-consistent fashion. This
treatment allows for an accu... | 1512.05519v4 |
2015-12-18 | Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi | We observed the coexistence of superconductivity and antiferromagnetic order
in the single-crystalline ternary pnictide HoPdBi, a plausible topological
semimetal. The compound orders antiferromagnetically at $T_N =$1.9 K and
exhibits superconductivity below $T_c =$0.7 K, which was confirmed by magnetic,
electrical tran... | 1512.05972v1 |
2016-02-08 | Phase separated behavior in Yttrium doped CaMnO3 | The effect of electron doping on the structural, transport, and magnetic
properties of Mn (IV) - rich Ca1-xYxMnO3 (x < 0.2) samples have been
investigated using neutron diffraction, neutron depolarization, magnetization
and resistivity techniques. The temperature dependence of resistivity follows
the small polaron mode... | 1602.02479v1 |
2016-02-08 | Scaling behavior of temperature-dependent thermopower in CeAu2Si2 under pressure | We report a combined study of in-plane resistivity and thermopower of the
pressure-induced heavy fermion superconductor CeAu2Si2 up to 27.8 GPa. It is
found that thermopower follows a scaling behavior in T/T* almost up to the
magnetic critical pressure pc ~ 22 GPa. By comparing with resistivity results,
we show that th... | 1602.02498v2 |
2016-02-22 | Quantum Oscillations at Integer and Fractional Landau Level Indices in ZrTe5 | A three-dimensional (3D) Dirac semimetal (DS) is an analogue of graphene, but
with linear energy dispersion in all (three) momentum directions.3D DSs have
been a fertile playground in discovering novel quantum particles, for example
Weyl fermions, in solid state systems.Many 3D DSs (e.g., ZrTe5) were
theoretically pred... | 1602.06824v3 |
2016-02-26 | Eigenanalysis of morphological diversity in silicon random nanostructures formed via resist collapse | This paper demonstrates eigenanalysis to quantitatively reveal the diversity
and capacity of identities offered by the morphological diversity in silicon
nanostructures formed via random collapse of resist. The analysis suggests that
approximately 10^115 possible identities are provided per 0.18-um^2 area of
nanostruct... | 1602.08205v2 |
2016-04-29 | Ca$_3$Ir$_4$Sn$_{13}$: A weakly correlated nodeless superconductor | We report detailed Seebeck coefficient, Hall resistivity as well as specific
heat measurement on Ca$_3$Ir$_4$Sn$_{13}$ single crystals. The Seebeck
coefficient exhibits a peak corresponding to the anomaly in resistivity at
$T^*$, and the carrier density is suppressed significantly below $T^*$. This
indicates a signific... | 1604.08948v1 |
2016-06-06 | First-principles calculation of the stabilities of LMP/LAMP lithium superionic conductors against sodium-ion exchange in seawater | Electronic structure calculations carried out to estimate the free energies
of Na(aq)+ exchange for lithium in LiM2(PO4)3 (LMP, M=Si4+,Ge4+,Ti4+,Sn4+,Zr4+)
and Li1+xAlxM2-x(PO4)3 (LAMP; M=Ge4+,Ti4+, between 0 and 0.5) compounds in
seawater. The calculations show that resistance to sodium-ion exchange
increases with dec... | 1606.02177v1 |
2016-06-09 | Giant Linear Magneto-resistance in Nonmagnetic PtBi2 | We synthesized nonmagnetic PtBi$_2$ single crystals and observed a giant
linear magneto-resistance (MR) up to 684\% under a magnetic field $\mu_0H$ = 15
T at $T$ = 2 K. The linear MR decreases with increasing temperature, but it is
still as large as 61\% under $\mu_0H$ of 15 T at room temperature. Such a giant
linear M... | 1606.02847v1 |
2016-07-13 | Tuning the electronic and the crystalline structure of LaBi by pressure | Extreme magnetoresistance (XMR) in topological semimetals is a recent
discovery which attracts attention due to its robust appearance in a growing
number of materials. To search for a relation between XMR and
superconductivity, we study the effect of pressure on LaBi taking advantage of
its simple structure and simple ... | 1607.03560v1 |
2016-07-20 | Performance of Topological Insulator Interconnects | The poor performance of copper interconnects at the nanometer scale calls for
new material solutions for continued scaling of integrated circuits. We propose
the use of three dimensional time-reversal-invariant topological insulators
(TIs), which host backscattering-protected surface states, for this purpose.
Using sem... | 1607.06131v2 |
2016-08-03 | Prominent metallic surface conduction and the singular magnetic response of topological Dirac fermion in three-dimensional topological insulator Bi$_{1.5}$Sb$_{0.5}$Te$_{1.7}$Se$_{1.3}$ | We report semiconductor to metal-like crossover in temperature dependence of
resistivity ($\rho$) due to the switching of charge transport from bulk to
surface channel in three-dimensional topological insulator
Bi$_{1.5}$Sb$_{0.5}$Te$_{1.7}$Se$_{1.3}$. Unlike earlier studies, a much
sharper drop in $\rho$($T$) is obser... | 1608.01203v2 |
2016-08-11 | Magnetoresistance generated from charge-spin conversion by anomalous Hall effect in metallic ferromagnetic/nonmagnetic bilayers | A theoretical formulation of magnetoresistance effect in a metallic
ferromagnetic/nonmagnetic bilayer originated from the charge-spin conversion by
the anomalous Hall effect is presented. Analytical expressions of the
longitudinal and transverse resistivities in both nonmagnet and ferromagnet are
obtained by solving th... | 1608.03359v2 |
2016-08-12 | Growth of ultra thin vanadium dioxide thin films using magnetron sputtering | In this work, the results of fabricating ultra thin VO$_2$ films on the
technologically relevant amorphous SiO$_2$ surface using reactive DC magnetron
sputtering are presented. Results indicate that a post deposition anneal in low
partial pressures of oxygen is an effective way at stabilizing the
VO$_2$(M$_{1}$) phase ... | 1608.03911v1 |
2016-08-31 | Spin polarization ratios of resistivity and density of states estimated from anisotropic magnetoresistance ratio for nearly half-metallic ferromagnets | We derive a simple relational expression between the spin polarization ratio
of resistivity, $P_\rho$, and the anisotropic magnetoresistance ratio $\Delta
\rho/\rho$, and that between the spin polarization ratio of the density of
states at the Fermi energy, $P_{\rm DOS}$, and $\Delta \rho/\rho$ for nearly
half-metallic... | 1608.08888v1 |
2016-10-17 | Anomalous Hall effect of ferromagnetic Fe3Sn2 single crystal with geometrically frustrated kagome lattice | The anomalous Hall effect is investigated for ferromagnetic Fe3Sn2 single
crystal with geometrically frustrated kagome bilayer of Fe. The scaling
behavior between anomalous Hall resistivity rho_{xy}^{A} and longitudinal
resistivity rho_{xx} is quadratic and further analysis implies that the AHE in
Fe3Sn2 single crystal... | 1610.04970v1 |
2016-11-11 | MgGa2O4 spinel barrier for magnetic tunnel junctions: coherent tunneling and low barrier height | Epitaxial Fe/magnesium gallium spinel oxide (MgGa2O4)/Fe(001) magnetic tunnel
junctions (MTJs) were fabricated by magnetron sputtering. Tunnel
magnetoresistance (TMR) ratio up to 121% at room temperature (196% at 4 K) was
observed, suggesting a TMR enhancement by the coherent tunneling effect in the
MgGa2O4 barrier. Th... | 1611.03606v1 |
2016-11-28 | Doping of metal-organic frameworks towards resistive sensing | Coordination polymerization leads to various metal-organic frameworks (MOFs)
in which symmetrical metal nodes exposed to nano voids lead to unique physical
properties and chemical functionalities. One of the challenges towards their
applications as porous materials is to make MOFs optimally conductive to be
used as ele... | 1611.09138v1 |
2016-12-02 | Stokes paradox in electronic Fermi liquids | The Stokes paradox is the statement that in a viscous two dimensional fluid,
the "linear response" problem of fluid flow around an obstacle is ill-posed. We
present a simple consequence of this paradox in the hydrodynamic regime of a
Fermi liquid of electrons in two-dimensional metals. Using hydrodynamics and
kinetic t... | 1612.00856v2 |
2017-02-08 | Ironwood Meta Key Agreement and Authentication Protocol | Number theoretic public-key solutions, currently used in many applications
worldwide, will be subject to various quantum attacks, making them less
attractive for longer-term use. Certain group theoretic constructs are now
showing promise in providing quantum-resistant cryptographic primitives, and
may provide suitable ... | 1702.02450v2 |
2017-06-08 | Scale-invariant large nonlocality in polycrystalline graphene | The observation of large nonlocal resistances near the Dirac point in
graphene has been related to a variety of intrinsic Hall effects, where the
spin or valley degrees of freedom are controlled by symmetry breaking
mechanisms. Engineering strong spin or valley Hall signals on scalable graphene
devices could stimulate ... | 1706.02539v2 |
2017-09-01 | Reproducibility and off-stoichiometry issues in nickelate thin films grown by pulsed laser deposition | Rare-earth nickelates are strongly correlated oxides displaying a
metal-to-insulator transition at a temperature tunable by the rare-earth ionic
radius. In PrNiO$_3$ and NdNiO$_3$, the transition is very sharp and shows an
hysteretic behavior akin to a first-order transition. Both the temperature at
which the transitio... | 1709.00240v1 |
2017-09-05 | Temperature Dependent n-p Transition of 3 Dimensional Dirac Semimetal Na$_3$Bi Thin Film | We study the temperature dependence ($77$ K - $475$ K) of the longitudinal
resistivity and Hall coefficient of thin films (thickness $20$ nm) of three
dimensional topological Dirac semimetal Na$_3$Bi grown via molecular beam
epitaxy (MBE). The temperature-dependent Hall coefficient is electron-like at
low temperature, ... | 1709.01209v1 |
2017-09-05 | Superconducting and normal-state properties of the noncentrosymmetric superconductor Re6Zr | We systematically investigate the normal and superconducting properties of
non-centrosymmetric Re$_{6}$Zr using magnetization, heat capacity, and
electrical resistivity measurements. Resistivity measurements indicate
Re$_{6}$Zr has poor metallic behavior and is dominated by disorder. Re$_6$Zr
undergoes a superconductin... | 1709.01328v1 |
2017-09-11 | Tuning electrical properties of silicon dioxide through intrinsic nano-patterns | The inherent network of nanopores and voids in silicon dioxide (SiO2) is
generally undesirable for aspects of film quality, electrical insulation and
dielectric performance. However, if we view these pores as natural
nano-patterns embedded in a dielectric matrix then that opens up new vistas for
exploration. The nano-p... | 1709.03259v1 |
2017-09-14 | Towards Universal Non-Volatile Resistance Switching in Non-metallic Monolayer Atomic Sheets | Here, we report the intriguing observation of stable non-volatile resistance
switching (NVRS) in single-layer atomic sheets sandwiched between metal
electrodes. NVRS is observed in the prototypical semiconducting (MX2, M=Mo, W;
and X=S, Se) transitional metal dichalcogenides (TMDs), and insulating
hexagonal boron nitri... | 1709.04592v1 |
2017-11-06 | Negative to Positive Magnetoresistance transition in Functionalization of Carbon nanotube and Polyaniline Composite | Electrical resistivity and magnetoresistance(MR) in polyaniline(PANI) with
carbon nanotube(CNT) and functionalized carbon nanotube(fCNT) composites have
been studied for different weight percentage down to the temperature 4.2K and
up to magnetic field 5T. Resistivity increases significantly in composite at
low temperat... | 1711.01957v2 |
2017-11-27 | Effect of RF Sputtering Process Parameters on Silicon Nitride Thin Film Deposition | The objective of this work was to study the RF sputtering process parameters
optimisation for deposition of Silicon Nitride thin films. The process
parameters chosen to be varied were deposition power, deposition duration, flow
rate of argon and flow rate of nitrogen. The parameters were varied at three
levels accordin... | 1711.09556v2 |
2017-12-29 | Non-stoichiometry effects on the extreme magnetoresistance in Weyl semimetal WTe2 | Non-stoichiometry effect on the extreme magnetoresistance is systematically
investigated for the Weyl semimetal WTe2. Magnetoresistance and Hall
resistivity are measured for the as-grown samples with a slight difference in
Te vacancies and the annealed samples with increased Te vacancies. The fittings
to a two-carrier ... | 1712.10200v2 |
2018-03-03 | Giant Planar Hall Effect in the Dirac Semimetal ZrTe5 | Recently, giant planar Hall effect originating from chiral anomaly has been
predicted in nonmagnetic Dirac/Weyl semimetals. ZrTe5 is considered to be an
intriguing Dirac semimetal at the boundary of weak topological insulators and
strong topological insulators, though this claim still remains controversial.
Here, we re... | 1803.01213v2 |
2018-03-18 | Bulk transport properties of Bismuth selenide thin films approaching the two-dimensional limit | We have investigated the transport properties of topological insulator Bi2Se3
thin films grown using magnetron sputtering with an emphasis on understanding
the behavior as a function of thickness. We show that thickness has a strong
influence on all aspects of transport as the two-dimensional limit is
approached. Bulk ... | 1803.06593v1 |
2018-03-30 | Growth of Thin Oxidation-Resistive Crystalline Si Nanostructures on Graphene | We report the growth of Si nanostructures, either as thin films or
nanoparticles, on graphene substrates. The Si nanostructures are shown to be
single crystalline, air stable and oxidation resistive, as indicated by the
observation of a single crystalline Si Raman mode at around 520 cm-1, a STM
image of an ordered surf... | 1804.00072v1 |
2018-03-31 | Quantum Wires and Waveguides Formed in Graphene by Strain | Confinement of electrons in graphene to make devices has proven to be a
challenging task. Electrostatic methods fail because of Klein tunneling, while
etching into nanoribbons requires extreme control of edge terminations, and
bottom-up approaches are limited in size to a few nanometers. Fortunately, its
mechanical fle... | 1804.00207v1 |
2018-04-05 | Two-Stage Proximity-Induced Gap-Opening in Topological Insulator - Insulating Ferromagnet (Bi$_x$Sb$_{1-x}$)$_2$Te$_3$ - EuS Bilayers | To further investigate the interplay between ferromagnetism and topological
insulators, thin films of the low-carrier topological insulator
(Bi$_x$Sb$_{1-x}$)$_2$Te$_3$ were deposited on the insulating ferromagnet EuS
(100) in situ. AC susceptibility indicates magnetic anomalies between
$T\approx30~\mathrm{K}$ and $T\a... | 1804.02061v2 |
2018-04-16 | Structural and magnetic properties of CeZnAl$_3$ single crystals | We have synthesized single crystals of CeZnAl$_3$, which is a new member of
the family of the Ce-based intermetallics Ce$TX_3$ ($T$ = transition metal,
$X$= Si, Ge, Al), crystallizing in the non-centrosymmetric tetragonal
BaNiSn$_3$-type structure. Magnetization, specific heat and resistivity
measurements all show that... | 1804.05477v1 |
2018-05-11 | Unveiling the mechanisms of the spin Hall effect in Ta | Spin-to-charge current interconversions are widely exploited for the
generation and detection of pure spin currents and are key ingredients for
future spintronic devices including spin-orbit torques and spin-orbit logic
circuits. In case of the spin Hall effect, different mechanisms contribute to
the phenomenon and det... | 1805.04475v1 |
2018-06-04 | Nodeless superconductivity in the SnAs-based van der Waals type superconductor NaSn2As2 | We grew the single crystals of the SnAs-based van der Waals (vdW)-type
superconductor NaSn$_2$As$_2$ and systematically measured its resistivity,
specific heat, and ultralow-temperature thermal conductivity. The
superconducting transition temperature $T_c$ = 1.60 K of our single crystal is
0.3 K higher than that previo... | 1806.01141v1 |
2018-06-20 | Heat transport in pristine and polycrystalline single-layer hexagonal boron nitride | We use a phase field crystal model to generate large-scale bicrystalline and
polycrystalline single-layer hexagonal boron nitride (h-BN) samples and employ
molecular dynamics (MD) simulations with the Tersoff many-body potential to
study their heat transport properties. The Kapitza thermal resistance across
individual ... | 1806.07936v2 |
2018-09-17 | Phase transformations and compatibility in helical structures | We systematically study phase transformations from one helical structure to
another. Motivated in part by recent work that relates the presence of
compatible interfaces with properties such as the hysteresis and reversibility
of a phase transformation [35, 33, 12, 28], we give necessary and sufficient
conditions on the... | 1809.06282v2 |
2019-05-01 | Hydrodynamic Coulomb drag and bounds on diffusion | We study Coulomb drag between an active layer with a clean electron liquid
and a passive layer with a pinned electron lattice in the regime of fast
intralayer equilibration. Such a two-fluid system offers an experimentally
realizable way to disentangle the fast rate of intralayer electron-electron
interactions from the... | 1905.00317v2 |
2019-05-03 | Supersonic flow and negative local resistance in hydrodynamic Dirac electron nozzles | In clean Dirac electron systems such as graphene, electron-electron
interactions can dominate over other relaxation mechanisms such as phonon or
impurity scattering. It has been predicted that in this limit, collective
electron dynamics can be described by hydrodynamic equations. The prerequisites
for electron liquids ... | 1905.01247v2 |
2019-05-21 | Thermal Boundary Resistance Measurement and Analysis Across SiC/SiO2 Interface | Silicon Carbide (SiC) is a typical material for third-generation
semiconductor. The thermal boundary resistance (TBR) of 4H-SiC/SiO2 interface,
was investigated by both experimental measurements and theoretical
calculations. The structure of 4H-SiC/SiO2 was characterized by using
transmission electron microscopy and X-... | 1905.08570v1 |
2019-05-29 | The effect of atomic structure on the electrical response of aluminium oxide tunnel junctions | Many nanoelectronic devices rely on thin dielectric barriers through which
electrons tunnel. For instance, aluminium oxide barriers are used as Josephson
junctions in superconducting electronics. The reproducibility and drift of
circuit parameters in these junctions are affected by the uniformity,
morphology, and compo... | 1905.12214v1 |
2019-09-06 | Structural, Surface Morphology and Magneto-Transport properties of Self Flux Grown Eu Doped Bi2Se3 Single Crystal | Here, we report the effect of europium (Eu) doping in Bi2Se3 topological
insulator (TI) by using different characterization techniques viz. X-ray
diffraction (XRD), scanning electron microscopy (SEM) coupled with energy
dispersive X-ray analysis (EDXA) and magneto-transport measurements.
Temperature dependent electrica... | 1909.02713v1 |
2019-09-12 | Magneto-transport and Shubnikov-de Haas oscillations in the layered ternary telluride Ta3SiTe6 topological semimetal | Topological semimetals characterize a novel class of quantum materials
hosting Dirac/Weyl fermions. The important features of topological fermions can
be exhibited by quantum oscillations. Here we report the magnetoresistance and
Shubnikov-de Haas (SdH) quantum oscillation of longitudinal resistance in the
single cryst... | 1909.05564v1 |
2019-09-17 | A Thermal Resistance Network Model for Heat Conduction of Amorphous Polymers | Thermal conductivities (TCs) of the vast majority of amorphous polymers are
in a very narrow range, 0.1 $\sim$ 0.5 Wm$^{-1}$K$^{-1}$, although single
polymer chains possess TC of orders-of-magnitude higher. Entanglement of
polymer chains plays an important role in determining the TC of bulk polymers.
We propose a therm... | 1909.07607v1 |
2019-09-17 | A "road-map" of Nickelate superconductivity | We comment on the electronic structure of Nickelate system $Nd Ni O_2$ which
shows superconductivity on doping. The doped system $Nd_{0.8}Sr_{0.2}NiO_2$
shows (most probably unconventional) superconductivity with transition
temperatures ranging from $9~K$ to $15~K$\cite{dang}. The resistivity of the
parent compound $Nd... | 1909.07688v1 |
2019-09-23 | Nanostructured La0.5Ba0.5CoO3 as cathode for solid oxide fuel cells | A simple method has been used to synthesize nanostructured La0.5Ba0.5CoO3
(LBCO) powders, by confining chemical precursors into the pores of
polycarbonate filters. The proposed method allows us to obtain powders formed
by crystallites of different sizes, it is scalable and does not involve the use
of sophisticated depo... | 1909.10611v1 |
2020-03-31 | In-situ grown single crystal aluminum as a non-alloyed ohmic contact to n-ZnSe by molecular beam epitaxy (MBE) | Novel ohmic contacts to n-ZnSe are demonstrated using single crystal Al films
deposited on epitaxially grown ZnSe (100) by molecular beam epitaxy (MBE).
Electron Backscatter Diffraction (EBSD) confirmed the single crystalline
structure of the Al films. The (110)-oriented Al layer was rotated rotated
45$^\circ$ relative... | 2003.14411v2 |
2014-08-16 | Control of InGaAs facets using metal modulation epitaxy (MME) | Control of faceting during epitaxy is critical for nanoscale devices. This
work identifies the origins of gaps and different facets during regrowth of
InGaAs adjacent to patterned features. Molecular beam epitaxy (MBE) near SiO2
or SiNx led to gaps, roughness, or polycrystalline growth, but metal modulated
epitaxy (MME... | 1408.3714v1 |
2014-08-20 | Fluctuation Effects on the Transport Properties of Unitary Fermi Gases | In this letter, we investigate the fluctuation effects on the transport
properties of unitary Fermi gases in the vicinity of the superfluid transition
temperature $T_c$. Based on the time-dependent Ginzburg-Landau formalism of the
BEC-BCS crossover, we investigate both the residual resistivity below $T_c$
induced by ph... | 1408.4557v1 |
2017-01-11 | Morphology and mechanical properties of nanocrystalline Cu/Ag alloy | Hybrid Monte Carlo (MC)/molecular dynamics (MD) simulations are conducted to
study the microstructures of nanocrystalline (nc) Cu/Ag alloys with various Ag
concentrations. When the Ag concentration is below 50 Ag atoms/nm!, an increase
in Ag concentration leads to a gradual growth of monolayer grain boundary (GB)
compl... | 1701.03013v1 |
2017-01-15 | Heat generation due to spin transport in spin valves | Using a macroscopic approach, we studied theoretically the heat generation
due to spin transport in a typical spin valve with nonmagnetic spacer layer of
finite thickness. Our analysis shows that the spin-dependent heat generation
can also be caused by another mechanism, the spin-conserving scattering in the
presence o... | 1701.03984v1 |
2017-01-17 | Conditions for $T^2$ resistivity from electron-electron scattering | Many complex oxides (including titanates, nickelates and cuprates) show a
regime in which resistivity follows a power law in temperature ($\rho\propto
T^2$). By analogy to a similar phenomenon observed in some metals at low
temperature, this has often been attributed to electron-electron (Baber)
scattering. We show tha... | 1701.04744v1 |
2017-01-30 | Negative differential resistance and magnetoresistance in zigzag borophene nanoribbons | We investigate the transport properties of pristine zigzag-edged borophene
nanoribbons (ZBNRs) of different widths, using the fist-principles
calculations. We choose ZBNRs with widths of 5 and 6 as odd and even widths.
The differences of the quantum transport properties are found, where even-N
BNRs and odd-N BNRs have ... | 1701.08501v1 |
2017-01-27 | Dynamics of a capacitive electret-based microcantilever for energy harvesting | In this paper, a novel electret-based capacitive energy harvesting device has
been developed according to out-of-plane gap closing scheme. The device is
composed of a micro cantilever and a substrate which form a variable capacitor
and is in series with a resistance. An electret material is used to provide the
bias vol... | 1701.08843v1 |
2017-03-07 | Possible devil's staircase in the Kondo lattice CeSbSe | The temperature ($T$) - magnetic field ($H$) phase diagram for the tetragonal
layered compound CeSbSe, is determined from magnetization, specific heat, and
electrical resistivity measurements. This system exhibits complex magnetic
ordering at $T_{\rm{M}}$ $=$ 3 K and the application of a magnetic field
results in a cas... | 1703.02204v3 |
2017-03-07 | Strong Electron-Phonon Interaction and Colossal Magnetoresistance in EuTiO$_3$ | At low temperatures, EuTiO$_3$ system has very large resistivities and
exhibits colossal magnetoresistance. Based on a first principle calculation and
the dynamical mean-field theory for small polaron we have calculated the
transport properties of EuTiO$_3$. It is found that due to electron-phonon
interaction the condu... | 1703.02238v4 |
2018-10-06 | Impact of Angular Deviation from Coincidence Site Lattice Grain Boundaries on Hydrogen Segregation and Diffusion in Alpha-iron | Coincidence Site Lattice (CSL) grain boundaries (GBs) are believed to be
low-energy, resistant to intergranular fracture, as well as to hydrogen
embrittlement. Nevertheless, the behavior of CSL-GBs are generally confused
with their angular deviations. In the current study, the effect of angular
deviation from the perfe... | 1810.02988v1 |
2018-10-07 | Thermal properties of NbN single-photon detectors | We investigate thermal properties of a NbN single-photon detector capable of
unit internal detection efficiency. Using an independent calibration of the
coupling losses we determine the absolute optical power absorbed by the NbN
film and, via a resistive superconductor thermometry, the thermal resistance
Z(T) of the Nb... | 1810.03134v2 |
2018-10-16 | Quantitative and systematic analysis of bias dependence of spin accumulation voltage in a non-degenerate Si spin valve | Spin accumulation voltages in a non-degenerate Si spin valve are discussed
quantitatively as a function of electric bias current using systematic
experiments and model calculations. As an open question in semiconductor
spintronics, the origin of the deviation of spin accumulation voltages measured
experimentally in a n... | 1810.06879v1 |
2019-02-19 | Nanoelectromechanical resonators from high-T$_c$ superconducting crystals of Bi$_2$Sr$_2$Ca$_1$Cu$_2$O$_{8+δ}$ | In this report, we present nanoelectromechanical resonators fabricated with
thin exfoliated crystals of a high-T$_c$ cuprate superconductor
Bi$_2$Sr$_2$Ca$_1$Cu$_2$O$_{8+\delta}$. The mechanical readout is performed by
capacitively coupling their motion to a coplanar waveguide microwave cavity
fabricated with a superco... | 1902.06896v1 |
2020-02-10 | Structural and magneto-transport studies of iron intercalated Bi2Se3 single crystals | A detailed investigation on the structural and magneto-transport properties
of iron intercalated Bi2Se3 single crystals have been presented. The x-ray
diffraction and Raman studies confirm the intercalation of Fe in the van der
Waals gaps between the layers. The electrical resistivity of the compounds
decreases upon in... | 2002.03609v2 |
2020-02-20 | Tunable correlation-driven symmetry breaking in twisted double bilayer graphene | A variety of correlated phases have recently emerged in select twisted van
der Waals (vdW) heterostructures owing to their flat electronic dispersions. In
particular, heterostructures of twisted double bilayer graphene (tDBG) manifest
electric field-tunable correlated insulating (CI) states at all quarter
fillings of t... | 2002.08904v1 |
2020-03-31 | Efficiency Increase in Multijunction Monochromatic Photovoltaic Devices Due to Luminescent Coupling | We present a multijunction detailed balance model that includes the effects
of luminescent coupling, light trapping and nonradiative recombination,
suitable for treatment of multijunction solar cells and photonic power
converters -- photovoltaic devices designed to convert narrow-band light. The
model includes both spe... | 2004.00081v1 |
2020-04-15 | Theory for Non-Fermi Liquid Temperature Dependence in Resistivity of Ce_xLa_{1-x} Cu_{5.62} Au_{0.38} (x=0.02-0.10) on the Local Quantum Valence Criticality of Ce Impurities | It was reported by Shiino et al in J. Phys. Soc. Jpn. 86, 123705 (2017) that
Ce_xLa_{1-x} Cu_{5.62} Au_{0.38} (x=0.02-0.10) exhibits a new type of quantum
criticality in both magnetic and thermal properties, which is the same as that
observed in a series of materials exhibiting quantum critical valence
fluctuations (QC... | 2004.06869v1 |
2020-04-20 | Anomalous pressure dependence of the electronic transport and anisotropy in SrIrO3 films | Iridate oxides display exotic physical properties that arise from the
interplay between a large spin-orbit coupling and electron correlations. Here,
we present a comprehensive study of the effects of hydrostatic pressure on the
electronic transport properties of SrIrO3 (SIO), a system that has recently
attracted a lot ... | 2004.09116v1 |
2022-02-07 | Time-correlation functions for odd Langevin systems | We investigate the statistical properties of fluctuations in active systems
that are governed by non-symmetric responses. Both an underdamped Langevin
system with an odd resistance tensor and an overdamped Langevin system with an
odd elastic tensor are studied. For a system in thermal equilibrium, the
time-correlation ... | 2202.03225v3 |
2022-02-24 | Resistivity anisotropy from the multiorbital Boltzmann equation in nematic FeSe | We compute the resistivity anisotropy in the nematic phase of FeSe from the
static solution of the multiorbital Boltzmann equation. By introducing disorder
at the level of the microscopic multiorbital model we show that even elastic
scattering by localized impurities may lead to non-trivial anisotropic
renormalization ... | 2202.12070v2 |
2007-10-05 | Strain-induced insulator state in La_0.7Sr_0.3CoO_3 | We report on the observation of a strain-induced insulator state in
ferromagnetic La_0.7Sr_0.3CoO_3 films. Tensile strain above 1% is found to
enhance the resistivity by several orders of magnitude. Reversible strain of
0.15% applied using a piezoelectric substrate triggers huge resistance
modulations, including a chan... | 0710.1306v1 |
2012-01-10 | Giant resistance change across the phase transition in spin crossover molecules | The electronic origin of a large resistance change in nanoscale junctions
incorporating spin crossover molecules is demonstrated theoretically by using a
combination of density functional theory and the non-equilibrium Green's
functions method for quantum transport. At the spin crossover phase transition
there is a dra... | 1201.2028v2 |
2014-01-08 | The features of contact resistivity behavior at helium temperatures for InP- and GaAs-based ohmic contacts | Contact resistivity rc of InP and GaAs based ohmic contacts was measured in
the 4.2/300 K temperature range. Nonmonotonic dependences rc(T), with a minimum
at temperature 50 K (150 K) for InP (GaAs) based contacts were obtained. The
results can be explained within the framework of the mechanism of current flow
through ... | 1401.1658v1 |
2016-03-16 | Mathematical Modeling of CRISPR-CAS system effects on biofilm formation | Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR), linked
with CRISPR associated (CAS) genes, play a profound role in the interactions
between phage and their bacterial hosts. It is now well understood that
CRISPR-CAS systems can confer adaptive immunity against bacteriophage
infections. However, the p... | 1603.05311v1 |
2017-04-10 | Experimental determination of phonon thermal conductivity and Lorenz ratio of single crystal bismuth telluride | We use a magnetothermal resistance method to measure the lattice thermal
conductivity of a single crystal of Bi$_2$Te$_3$ from 5 to 60 K. We apply a
large transverse magnetic field to suppress the electronic thermal conduction
while measuring thermal conductivity and electrical resistivity. The lattice
thermal conducti... | 1704.03029v1 |
2017-04-12 | Metal-Insulator Transition in Ga doped ZnO via Controlled Thickness | We report thickness dependent metal insulator transition in Ga doped ZnO
(Ga:ZnO) thin films grown by pulsed laser deposition technique. From the
electrical transport measurements, we find that while the thinnest film
exhibits a resistivity of 0.05 $\Omega$-cm, lying in the insulating regime, the
thickest has resistivi... | 1704.03846v1 |
2017-04-24 | Spin injection into silicon detected by broadband ferromagnetic resonance spectroscopy | We studied the spin injection in a NiFe(Py)/Si system using broadband
ferromagnetic resonance spectroscopy. The Gilbert damping parameter of the Py
layer on top of the Si channel was determined as a function of the Si doping
concentration and Py layer thickness. For fixed Py thickness we observed an
increase of the Gil... | 1704.07006v1 |
2017-05-27 | Magnetic and magnetotransport properties of ThCr2Si2-type Ce2O2Bi composed of conducting Bi2- square net and magnetic Ce-O layer | ThCr2Si2-type Ce2O2Bi epitaxial thin films were grown by recently developed
multilayer solid phase epitaxy. The ionic state of Ce was confirmed to be 3+ by
x-ray photoelectron spectroscopy, corresponding to the electronic configuration
of [Xe]4f1. Electrical resistivity showed the nonmonotonic temperature
dependence wi... | 1705.09774v1 |
2017-07-03 | Inverse spin Hall effect in Nd doped SrTiO3 | Conversion of spin to charge current was observed in SrTiO3 doped with Nd
(Nd:STO), which exhibited a metallic behavior even with low concentration
doping. The obvious variation of DC voltages for Py/Nd:STO, obtained by
inverting the spin diffusion direction, demonstrated that the detected signals
contained the contrib... | 1707.00444v1 |
2017-07-27 | Chiral transport along magnetic domain walls in the quantum anomalous Hall effect | The recent prediction, and subsequent discovery, of the quantum anomalous
Hall (QAH) effect in thin films of the three-dimensional ferromagnetic
topological insulator (MTI) (Cr$_y$Bi$_x$Sb$_{1-x-y}$)$_2$Te$_3$ has opened new
possibilities for chiral-edge-state-based devices in zero external magnetic
field. Like the $\n... | 1707.08677v1 |
2018-08-20 | Theory of bilinear magneto-electric resistance from topological-insulator surface states | We theoretically investigate a new kind of nonlinear magnetoresistance on the
surface of three-dimensional topological insulators (TIs). At variance with the
unidirectional magnetoresistance (UMR) effect in magnetic bilayers, this
nonlinear magnetoresistance does not rely on a conducting ferromagnetic layer
and scales ... | 1808.06339v1 |
2018-08-28 | Impact of antiferromagnetic order on Landau level splitting of quasi-two-dimensional Dirac fermions in EuMnBi$_2$ | We report spin-split Landau levels of quasi-two-dimensional Dirac fermions in
a layered antiferromagnet EuMnBi$_2$, as revealed by interlayer resistivity
measurements in a tilted magnetic field up to $\sim$35 T. The amplitude of
Shubnikov-de Haas (SdH) oscillation in interlayer resistivity is strongly
modulated by chan... | 1808.09424v1 |
2018-08-31 | Absence of superconductivity in pulsed laser deposited Au/Ag modulated nanostructured thin films | We have grown Au/Ag modulated nanostructured thin films by pulsed laser
deposition using metallic targets. The growths performed at room temperature
involved deposition of alternate layers of the two metals with larger thickness
of Au and much lower thickness of Ag (two cases) on crystalline silicon (100)
and quartz su... | 1808.10699v1 |
2019-03-02 | Turning ZrTe5 into semiconductor through atomic intercalation | In this work, we use the liquid ammonia method to successfully intercalate
potassium atoms into ZrTe5 single crystal, and find a transition from semimetal
to semiconductor at low temperature in the intercalated ZrTe5. The resistance
anomalous peak is gradually suppressed and finally disappears with increasing
potassium... | 1903.00644v1 |
2019-03-23 | An In-situ Annealing effect of Graphene-Graphene Interlayer Conduction | An interlayer distance modulation in twisted bilayer graphene is reported.
This is achieved by an in-situ annealing technique. The transformation of
systematic vacuum and hydrogen annealing effects in twisted bilayer CVD
graphene on SiO2 surface is reported based on experimental results. Incoherent
interlayer conductio... | 1903.09899v2 |
2019-04-05 | Effect of density on microwave-induced resistance oscillations in back-gated GaAs quantum wells | We report on microwave-induced resistance oscillations (MIROs) in a
tunable-density 30-nm-wide GaAs/AlGaAs quantum well. We find that the MIRO
amplitude increases dramatically with carrier density. Our analysis shows that
the anticipated increase in the effective microwave power and quantum lifetime
with density is not... | 1904.03140v1 |
2019-04-18 | Determining Phonon Mean Free Path Spectrum by Ballistic Phonon Resistance within a Nanoslot-Patterned Thin Film | At micro- to nano-scales, classical size effects in heat conduction play an
important role in suppressing the thermal transport process. Such effects occur
when the characteristic lengths become commensurate to the mean free paths
(MFPs) of heat carriers that are mainly phonons for nonmetallic crystals.
Beyond existing... | 1904.08956v2 |
2019-08-23 | Anomalous Kerr Effect in SrRuO$_3$ Thin Films | We study the magneto-optical Kerr effect (MOKE) in SrRuO$_3$ thin films,
uncovering wide regimes of wavelength, temperature, and magnetic field where
the Kerr rotation is not simply proportional to the magnetization but instead
displays two-component behavior. One component of the MOKE signal tracks the
average magneti... | 1908.08974v2 |
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