publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
|---|---|---|---|
1999-04-01 | Radio-frequency impedance measurements using a tunnel-diode oscillator (TDO) technique | A resonant method based on a tunnel-diode oscillator (TDO) for precision
measurements of relative impedance changes in materials, is described. The
system consists of an effective self-resonant LC-tank circuit driven by a
forward-biased tunnel diode operating in its negative resistance region.
Samples under investigati... | 9904026v1 |
2000-01-19 | Pseudogap effects on the c-axis charge dynamics in copper oxide materials | The c-axis charge dynamics of copper oxide materials in the underdoped and
optimally doped regimes has been studied by considering the incoherent
interlayer hopping. It is shown that the c-axis charge dynamics for the chain
copper oxide materials is mainly governed by the scattering from the in-plane
fluctuation, and t... | 0001260v1 |
2002-02-27 | Anisotropic Magnetoresistance in Ga$_{1-x}$Mn$_x$As | We have measured the magnetoresistance in a series of Ga$_{1-x}$Mn$_x$As
samples with 0.033$\le x \le$ 0.053 for three mutually orthogonal orientations
of the applied magnetic field. The spontaneous resistivity anisotropy (SRA) in
these materials is negative (i.e. the sample resistance is higher when its
magnetization ... | 0202508v1 |
2008-05-28 | Unified explanation of the Kadowaki-Woods ratio in strongly correlated materials | Discoveries of ratios whose values are constant within broad classes of
materials have led to many deep physical insights. The Kadowaki-Woods ratio
(KWR) compares the temperature dependence of a metal's resistivity to that of
its heat capacity; thereby probing the relationship between the
electron-electron scattering r... | 0805.4275v4 |
2016-06-15 | Suppression of lattice thermal conductivity by mass-conserving cation mutation in multi-component semiconductors | In semiconductors almost all heat is conducted by phonons (lattice
vibrations), which is limited by their quasi-particle lifetimes. Phonon-phonon
interactions represent scattering mechanisms that produce thermal resistance.
In thermoelectric materials, this resistance due to anharmonicity should be
maximised for optima... | 1606.04914v1 |
2018-06-12 | Determination of the BCS material parameters of the HIE-ISOLDE superconducting resonator | Superconducting material parameters of the Nb film coating on the
Quarter-Wave Resonator (QWR) for the HIE-ISOLDE project were studied by fitting
experimental results with the Mattis-Bardeen theory. We pointed out a strong
correlation among fitted estimators of material parameters in the BCS theory,
and proposed a proc... | 1806.04443v1 |
2018-09-19 | Electrical Parameters for Planar Transport in Graphene and 2-D Materials | Classical electrodynamics has been revisited with a view to recast the
electrical parameters for planar transport in 2-dimensional (2-D) materials
like graphene. In this attempt a new line integral, named transverse line
integral, with extensive applications in 2-D, is defined. Since the existing
divergence theorem in ... | 1809.07319v1 |
2020-09-04 | Fracture mechanics of micro samples: Fundamental considerations | In this review article we consider the crack growth resistance ofmicrometer
and submicrometer sized samples from the fracture mechanics point of view.
Standard fracture mechanics test procedures were developed for macroscale
samples, and reduction of the specimen dimensions by three to five orders of
magnitude has seve... | 2009.05386v1 |
2015-07-23 | Ba{0.4}Rb{0.6}Mn2As2: A Prototype Half-Metallic Ferromagnet | Half-metallic ferromagnetism (FM) in single-crystal
Ba{0.39(1)}Rb{0.61(1)}Mn2As2 below its Curie temperature TC = 103(2) K is
reported. The magnetization M versus applied magnetic field H isotherm data at
1.8 K show complete polarization of the itinerant doped-hole magnetic moments
that are introduced by substituting R... | 1507.06679v1 |
2018-12-18 | Atomistic study of an ideal metal/thermoelectric contact: the full-Heusler/half-Heusler interface | Half-Heusler alloys such as the (Zr,Hf)NiSn intermetallic compounds are
important thermoelectric materials for converting waste heat into electricity.
Reduced electrical resistivity at the hot interface between the half-Heusler
material and a metal contact is critical for device performance, however this
has yet to be ... | 1812.07189v1 |
2020-11-21 | All-Materials-Inclusive Flash Spark Plasma Sintering | A new flash (ultra-rapid) spark plasma sintering method applicable to various
materials systems, regardless of their electrical resistivity, is developed. A
number of powders ranging from metals to electrically insulative ceramics have
been successfully densified resulting in homogeneous microstructures within
sinterin... | 2011.14012v1 |
2021-03-26 | A micropolar continuum model of diffusion creep | Solid polycrystalline materials undergoing diffusion creep are usually
described by Cauchy continuum models with a Newtonian viscous rheology
dependent on the grain size. Such a continuum lacks the rotational degrees of
freedom needed to describe grain rotation. Here we provide a more general
continuum description of d... | 2103.14458v3 |
2021-04-30 | Material surface -- analyte interactions with similar energy rates vary as univariate quadratic function of topological polar surface area of analytes | Material surface - analyte interactions play important roles in numerous
processes including gas sensing. However, the effects of topological polar
surface area (TPSA) of analytes on surface interactions during gas sensing have
been so far largely disregarded. In this work, based on experimental
observations on changes... | 2104.14867v1 |
2022-06-08 | Scalable fabrication of edge contacts to 2D materials | We present a fabrication method for reliably and reproducibly forming
electrical contacts to 2D materials, based on the tri-layer resist system. We
demonstrate the applicability of this method for epitaxial graphene on silicon
carbide (epigraphene) and the transition metal dichalcogenides (TMDCs)
molybdenum disulfide (... | 2206.03839v2 |
2022-07-04 | An Important Structural Requirement for the Superconductor Material: A Hypothesis | On a microscopic scale, resistivity during electric conduction is caused by
collisions of the free conduction electrons with the obstructing atoms or
molecules of the conductor material, resulting in heat production. Based on
this fundamental understanding, a hypothesis concerning a physical requirement
of the supercon... | 2207.01226v2 |
1994-06-03 | Localization Effects in Bi2Sr2Ca(Cu,Co)2O8+y High Temperature Superconductors | Doping Bi2Sr2Ca1Cu2O8+y with Co causes a superconductor-insulator transition.
We study correlations between changes in the electrical resistivity RHOab(T)
and the electronic bandstructure using identical single crystalline samples.
For undoped samples the resistivity is linear in temperature and has a
vanishing residua... | 9406021v1 |
2011-11-17 | Stability of a self-gravitating homogeneous resistive plasma | In this paper, we analyze the stability of a homogeneous self-gravitating
plasma, having a non-zero resistivity. This study provides a generalization of
the Jeans paradigm for determining the critical scale above which gravitational
collapse is allowed. We start by discussing the stability of an ideal
self-gravitating ... | 1111.4051v1 |
2013-02-26 | Inter-plane resistivity of isovalent doped BaFe$_2$(As$_{1-x}$P$_x$)$_2$ | Temperature-dependent inter-plane resistivity, $\rho_c(T)$, was measured for
the iron-based superconductor BaFe$_2$(As$_{1-x}$P$_x$)$_2$ over a broad
isoelectron phosphorus substitution range from $x$=0 to $x$=0.60, from
non-superconducting parent compound to heavily overdoped superconducting
composition with $T_c\appr... | 1302.6440v1 |
2013-05-16 | Effect of doping on the magnetostructural ordered phase of iron arsenides: A comparative study of the resistivity anisotropy in the doped BaFe$_2$As$_2$ with doping into three different sites | In order to unravel a role of doping in the iron-based superconductors, we
investigated the in-plane resistivity for BaFe$_2$As$_2$ doped at either of the
three different lattice sites, Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$,
BaFe$_2$(As$_{1-x}$P$_x$)$_2$, and Ba$_{1-x}$K$_x$Fe$_2$As$_2$, focusing on the
doping effect in the l... | 1305.3744v1 |
2016-01-13 | Limiting the Development of Anti-Cancer Drug Resistance in a Spatial Model of Micrometastases | While chemoresistance in primary tumors is well-studied, much less is known
about the influence of systemic chemotherapy on the development of drug
resistance at metastatic sites. In this work, we use a hybrid spatial model of
tumor response to a DNA damaging drug to study how the development of
chemoresistance in micr... | 1601.03412v2 |
2014-01-08 | Angular and Polarization Response of Multimode Sensors with Resistive-Grid Absorbers | High sensitivity receiver systems with near ideal polarization sensitivity
are highly desirable for development of millimeter and sub-millimeter radio
astronomy. Multimoded bolometers provide a unique solution to achieve such
sensitivity, for which hundreds of single-mode sensors would otherwise be
required. The primar... | 1401.1859v1 |
2021-08-30 | Clonal Diversity at Cancer Recurrence | Despite initial success, cancer therapies often fail due to the emergence of
drug-resistant cells. In this study, we use a mathematical model to investigate
how cancer evolves over time, specifically focusing on the state of the tumor
when it recurs after treatment. We use a two-type branching process to capture
the dy... | 2108.13472v3 |
2022-03-23 | A Fast Diagnostic to Inform Screening of Discarded or Retired Batteries | With the increased pervasiveness of Lithium-ion batteries, there is growing
concern for the amount of retired batteries that will be entering the waste
stream. Although these batteries no longer meet the demands of their first
application, many still have a significant portion of their initial capacity
remaining for us... | 2203.12376v1 |
2023-01-15 | Effects of quantum recoil forces in resistive switching in memristors | Memristive devices, whose resistance can be controlled by applying a voltage
and further retained, are attractive as possible circuit elements for
neuromorphic computing. This new type of devices poses a number of both
technological and theoretical challenges. Even the physics of the key process
of resistive switching,... | 2301.06066v2 |
2024-01-16 | Resistively controlled primordial magnetic turbulence decay | Magnetic fields generated in the early Universe undergo turbulent decay
during the radiation-dominated era. The decay is governed by a decay exponent
and a decay time. It has been argued that the latter is prolonged by magnetic
reconnection, which depends on the microphysical resistivity and viscosity.
Turbulence, on t... | 2401.08569v3 |
2015-09-11 | Model of Flux Trapping in Cooling Down Process | The flux trapping that occurs in the process of cooling down of the
superconducting cavity is studied. The critical fields $B_{c2}$ and $B_{c1}$
depend on a position when a material temperature is not uniform. In a region
with $T\simeq T_c$, $B_{c2}$ and $B_{c1}$ are strongly suppressed and can be
smaller than the ambi... | 1509.03369v1 |
2020-06-21 | A Novel Magnetic Material by Design: Observation of Yb3+ with Spin-1/2 and Possible Superconducting Trace in YbxPt5P | The localized f-electrons enrich the magnetic properties in rare-earth-based
intermetallics. Among those, compounds with heavier 4d and 5d transition metals
are even more fascinating because anomalous electronic properties may be
induced by the hybridization of 4f and itinerant conduction electrons primarily
from the d... | 2006.11891v1 |
2024-03-19 | Giant electrode effect on tunneling magnetoresistance and electroresistance in van der Waals intrinsic multiferroic tunnel junctions using VS2 | Van der Waals multiferroic tunnel junctions (vdW-MFTJs) with multiple
nonvolatile resistive states are highly suitable for new physics and
next-generation storage electronics. However, currently reported vdW-MFTJs are
based on two types of materials, i.e., vdW ferromagnetic and ferroelectric
materials, forming a multif... | 2403.12845v2 |
2001-05-15 | Current-Driven Magnetic Memory with Tunable Magnetization Switching | Co(x nm, x=10nm or 40nm)/Cu(5nm)/Co(2.5nm) layers were deposited between
copper electrodes in SiO2 vias. Magnetic states, and the corresponding
resistance states, of these devices were switched by electric currents
perpendicular to the layers. The I-V loops show asymmetric behavior with
hysteresis. When electrons flow ... | 0105290v1 |
2005-12-19 | Multiphoton processes in microwave photoresistance of 2D electron system | We extend our studies of microwave photoresistance of ultra-high mobility
two-dimensional electron system (2DES) into the high-intensity, non-linear
regime employing both monochromatic and bichromatic radiation. Under
high-intensity monochromatic radiation $\omega$ we observe new zero-resistance
states (ZRS) which corr... | 0512479v1 |
2007-08-17 | Developments and the preliminary tests of Resistive GEMs manufactured by a screen printing technology | We report promising initial results obtained with new resistive-electrode GEM
(RETGEM) detectors manufactured, for the first time, using screen printing
technology. These new detectors allow one to reach gas gains nearly as high as
with ordinary GEM-like detectors with metallic electrodes; however, due to the
high resi... | 0708.2344v1 |
2016-03-15 | Thermo Activated Hysteresis on High Quality Graphene/h-BN Devices | We report on gate hysteresis in resistance on high quality graphene/h-BN
devices. We observe a thermal activated hysteretic behavior in resistance as a
function of the applied gate voltage at temperatures above 375K. In order to
investigate the origin of the hysteretic phenomenon, we design heterostructures
involving g... | 1603.04872v1 |
2021-09-29 | Magnetotransport patterns of collective localization near $ν=1$ in a high-mobility two-dimensional electron gas | We report complex magnetotransport patterns of the $\nu=1$ integer quantum
Hall state in a GaAs/AlGaAs sample from the newest generation with a record
high electron mobility. The reentrant integer quantum Hall effect in the flanks
of the $\nu=1$ plateau indicates the formation of the integer quantum Hall
Wigner solid, ... | 2109.14649v1 |
2024-04-29 | Mobility and Threshold Voltage Extraction in Transistors with Gate-Voltage-Dependent Contact Resistance | The mobility of emerging (e.g., two-dimensional, oxide, organic)
semiconductors is commonly estimated from transistor current-voltage
measurements. However, such devices often experience contact gating, i.e.,
electric fields from the gate modulate the contact resistance during
measurements, which can lead conventional ... | 2404.19022v1 |
2004-09-11 | Magnetic and electron transport properties of the rare-earth cobaltates, La0.7-xLnxCa0.3CoO3 (Ln = Pr, Nd, Gd and Dy) : A case of phase separation | Magnetic and electrical properties of four series of rare earth cobaltates of
the formula La0.7-xLnxCa0.3CoO3 with Ln = Pr, Nd, Gd and Dy have been
investigated. Compositions close to x = 0.0 contain large ferromagnetic
clusters or domains, and show Brillouin-like behaviour of the field-cooled DC
magnetization data wit... | 0409288v2 |
2004-11-17 | Al substitution in MgB2 crystals: influence on superconducting and structural properties | Single crystals of Mg1-xAlxB2 have been grown at a pressure of 30 kbar using
the cubic anvil technique. Precipitation free crystals with x < 0.1 were
obtained as a result of optimization of already developed MgB2 crystal growth
procedure. Systematic decrease of the c-axis lattice constant with increasing
Al content, wh... | 0411449v2 |
2007-08-01 | Structural and transport properties of GaAs/delta<Mn>/GaAs/InxGa1-xAs/GaAs quantum wells | We report results of investigations of structural and transport properties of
GaAs/Ga(1-x)In(x)As/GaAs quantum wells (QWs) having a 0.5-1.8 ML thick Mn
layer, separated from the QW by a 3 nm thick spacer. The structure has hole
mobility of about 2000 cm2/(V*s) being by several orders of magnitude higher
than in known f... | 0708.0056v1 |
2009-08-03 | Fabrication of Diamond Nanowires for Quantum Information Processing Applications | We present a design and a top-down fabrication method for realizing diamond
nanowires in both bulk single crystal and polycrystalline diamond. Numerical
modeling was used to study coupling between a Nitrogen Vacancy (NV) color
center and optical modes of a nanowire, and to find an optimal range of
nanowire diameters th... | 0908.0352v2 |
2015-08-25 | Central Acceptance Testing for Camera Technologies for CTA | The Cherenkov Telescope Array (CTA) is an international initiative to build
the next generation ground based very-high energy gamma-ray observatory. It
will consist of telescopes of three different sizes, employing several
different technologies for the cameras that detect the Cherenkov light from the
observed air show... | 1508.06074v1 |
2016-08-28 | Magnetic order and spin-orbit coupled Mott state in double perovskite (La$_{1-x}$Sr$_x$)$_2$CuIrO$_6$ | Double-perovskite oxides that contain both 3d and 5d transition metal
elements have attracted growing interest as they provide a model system to
study the interplay of strong electron interaction and large spin-orbit
coupling (SOC). Here, we report on experimental and theoretical studies of the
magnetic and electronic ... | 1608.07763v2 |
2017-10-11 | Fermi surface with Dirac fermions in CaFeAsF determined via quantum oscillation measurements | Despite the fact that 1111-type iron arsenides hold the record transition
temperature of iron-based superconductors, their electronic structures have not
been studied much because of the lack of high-quality single crystals. In this
study, we completely determine the Fermi surface in the antiferromagnetic state
of CaFe... | 1710.03938v3 |
2020-04-23 | Ultralow Schottky Barriers in hBN-Encapsulated Monolayer WSe$_2$ Tunnel Field-Effect Transistors | To explore the potential of field-effect transistors (FETs) based on
monolayers of the two-dimensional semiconducting channel(SC) for spintronics,
the two most important issues are to ensure the formation of variable low
resistive tunnel ferromagnetic contacts(FC), and to preserve intrinsic
properties of the SC during ... | 2004.10962v1 |
2015-04-23 | Fowler-Nordheim Plot Analysis: a Progress Report | The commonest method of characterizing a cold field electron emitter is to
measure its current-voltage characteristics, and the commonest method of
analysing these characteristics is by means of a Fowler-Nordheim (FN) plot.
This tutorial/review-type paper outlines a more systematic method of setting
out the Fowler-Nord... | 1504.06134v7 |
2018-07-07 | Three-dimensional quantum Hall effect and metal-insulator transition in ZrTe5 | Symmetry, dimensionality, and interaction are crucial ingredients for phase
transitions and quantum states of matter. As a prominent example, the integer
quantum Hall effect (QHE) represents a topological phase generally regarded as
characteristic for two-dimensional (2D) electronic systems, and its many
aspects can be... | 1807.02678v2 |
2019-01-14 | Detailed physical property characterization of FeTe1-xSex x = 0.0 to 0.50 single crystals | Here, we report self flux single crystal growth of FeTe1-xSex for x = 0 to
0.50 series via solid state reaction route,the resulted crystals as seen are
shiny. X Ray diffraction performed on the surface of crystals elucidated the
growth in 00l plane, i.e. orientation in c direction only. Scanning electron
microscopy (SE... | 1901.04224v1 |
2019-01-24 | Fascinating interplay between Charge Density Wave Order and magnetic field in Non-magnetic Rare-Earth Tritelluride LaTe$_{3}$ | Charge density wave (CDW) states in solids bear an intimate connection to
underlying fermiology. Modification of the latter by a suitable perturbation
provides an attractive handle to unearth novel CDW states. Here, we combine
extensive magnetotransport experiments and first-principles electronic
structure calculations... | 1901.08267v2 |
2019-06-09 | Spin dynamics and unconventional magnetism in insulating La$_{(1-2x)}$Sr$_{2x}$Co$_{(1-x)}$Nb$_{x}$O$_3$ | We study the structural, magnetic, transport and electronic properties of
LaCoO$_3$ with Sr/Nb co-substitution, i.e.,
La$_{(1-2x)}$Sr$_{2x}$Co$_{(1-x)}$Nb$_{x}$O$_3$ using x-ray and neutron
diffraction, dc and ac-magnetization, neutron depolarization, dc-resistivity
and photoemission measurements. The powder x-ray and ... | 1906.03659v1 |
2019-10-14 | First predictive simulations for deuterium shattered pellet injection in ASDEX Upgrade | First simulations of deuterium shattered pellet injection (SPI) into an ASDEX
Upgrade H-Mode plasma with the JOREK MHD code are presented. Resistivity is
increased by one order of magnitude in most simulations to reduce computational
costs and allow for extensive parameter scans. The effect of various physical
paramete... | 1910.06095v4 |
2020-08-25 | Isospin Pomeranchuk effect and the entropy of collective excitations in twisted bilayer graphene | In condensed matter systems, higher temperatures typically disfavors ordered
phases leading to an upper critical temperature for magnetism,
superconductivity, and other phenomena. A notable exception is the Pomeranchuk
effect in 3He, in which the liquid ground state freezes upon increasing the
temperature due to the la... | 2008.10830v4 |
2021-05-18 | One-reactor vacuum and plasma synthesis of transparent conducting oxide nanotubes and nanotrees: from single wire conductivity to ultra-broadband perfect absorbers in the NIR | The eventual exploitation of one-dimensional nanomaterials yet needs the
development of scalable, high yield, homogeneous, and environmentally friendly
methods able to meet the requirements for the fabrication of under design
functional nanomaterials. In this article, we demonstrate a vacuum and plasma
one-reactor appr... | 2105.08751v1 |
2021-09-01 | Interaction driven giant thermopower in magic-angle twisted bilayer graphene | Magic-angle twisted bilayer graphene (MtBLG) has proven to be an extremely
promising new platform to realize and study a host of emergent quantum phases
arising from the strong correlations in its narrow bandwidth flat band. In this
regard, thermal transport phenomena like thermopower, in addition to being
coveted tech... | 2109.00361v2 |
2022-06-13 | Long-range magnetic order in the anisotropic triangular lattice system CeCd3As3 | We report the physical properties of $R$Cd$_{3}$As$_{3}$ ($R$ = La and Ce)
compounds, crystallized into a hexagonal ScAl$_{3}$C$_{3}$-type structure
($P$6$_{3}$/mmc) such that the $R$ sublattice forms a spin-orbit coupled
triangular lattice. Magnetic susceptibility measurements indicate the 4$f$
electrons of Ce$^{3+}$ ... | 2206.06403v1 |
2022-11-05 | Effect of various electron and hole transport layers on the performance of CsPbI3-based perovskite solar cells: A numerical investigation in DFT, SCAPS-1D, and wxAMPS frameworks | CsPbI3 has recently received tremendous attention as a possible absorber of
perovskite solar cells (PSCs). However, CsPbI3-based PSCs have yet to achieve
the high performance of the hybrid PSCs. In this work, we performed a density
functional theory (DFT) study using the Cambridge Serial Total Energy Package
(CASTEP) c... | 2211.02968v1 |
2023-01-30 | Infrared ellipsometry study of the charge dynamics in K3p-terphenyl | We report an infrared ellipsometry study of the charge carrier dynamics in
polycrystalline Kxp-terphenyl samples with nominal $x=3$, for which signatures
of high-temperature superconductivity were previously reported. The infrared
spectra are dominated by two Lorentzian bands with maxima around 4 000
cm$^{-1}$ and 12 0... | 2302.10097v2 |
2023-08-04 | Observation of Fractionally Quantized Anomalous Hall Effect | The integer quantum anomalous Hall (QAH) effect is a lattice analog of the
quantum Hall effect at zero magnetic field. This striking transport phenomenon
occurs in electronic systems with topologically nontrivial bands and
spontaneous time-reversal symmetry breaking. Discovery of its putative
fractional counterpart in ... | 2308.02657v1 |
2023-09-29 | Fractional Quantum Anomalous Hall Effect in a Graphene Moire Superlattice | The fractional quantum anomalous Hall effect (FQAHE), the analog of the
fractional quantum Hall effect1 at zero magnetic field, is predicted to exist
in topological flat bands under spontaneous time-reversal-symmetry breaking.
The demonstration of FQAHE could lead to non-Abelian anyons which form the
basis of topologic... | 2309.17436v4 |
2024-03-20 | Effect of annealing on the hot salt corrosion resistance of the fine-grained titanium alpha-alloy Ti-2.5Al-2.6Zr obtained via cold Rotary Swaging | A hot salt corrosion (HSC) test was performed on the fine-grained titanium
alpha-alloy Ti-2.5Al-2.6Zr (Russian industrial alloy PT-7M). The
ultrafine-grained (UFG) microstructure in the titanium alpha-alloy was formed
via cold Rotary Swaging. The grain size and volume fraction of the
recrystallized microstructure in th... | 2403.13587v1 |
2024-04-23 | Magnetic anisotropy in single-crystalline antiferromagnetic Mn$_2$Au | Multiple recent studies have identified the metallic antiferromagnet Mn$_2$Au
to be a candidate for spintronic applications due to apparent in-plane
anisotropy, preserved magnetic properties above room temperature, and
current-induced N\'eel vector switching. Crystal growth is complicated by the
fact that Mn$_2$Au melt... | 2404.15525v1 |
2006-05-06 | Three-dimensionality of field-induced magnetism in a high-temperature superconductor | Many physical properties of high-temperature (high-Tc) superconductors are
two-dimensional phenomena derived from their square planar CuO2 building
blocks. This is especially true of the magnetism from the copper ions. As
mobile charge carriers enter the CuO2 layers, the antiferromagnetism of the
parent insulators, whe... | 0605164v1 |
2008-06-24 | Crystal structure and phase transitions across the metal-superconductor boundary in the SmFeAsO1-xFx (0 < x < 0.20) family | The fluorine-doped rare-earth iron oxyarsenides, REFeAsO1-xFx (RE =rare
earth) have recently emerged as a new family of high-temperature
superconductors with transition temperatures (Tc) as high as 55 K (refs 1-4).
Early work has provided compelling evidence that the undoped parent materials
exhibit spin-density-wave (... | 0806.3962v1 |
2012-04-23 | Integrating Functional Oxides with Graphene | Graphene-oxide hybrid structures offer the opportunity to combine the
versatile functionalities of oxides with the excellent electronic transport in
graphene. Understanding and controlling how the dielectric environment affects
the intrinsic properties of graphene is also critical to fundamental studies
and technologic... | 1204.5161v1 |
2012-08-30 | High-pressure flux growth, structural, and superconducting properties of LnFeAsO (Ln = Pr, Nd, Sm) single crystals | Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with
lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high
pressure. The crystals are of good structural quality and become
superconducting when O is partially substituted by F (PrFeAsO1-xFx and
NdFeAsO1-xFx) or when Fe is substituted... | 1208.6207v2 |
2013-09-06 | MgB2 nonlinear properties investigated under localized high rf magnetic field excitation-report 2 | The high transition temperature and low surface resistance of MgB2 attracts
interest in its potential application in superconducting radio frequency
accelerating cavities. However, compared to traditional Nb cavities, the
viability of MgB2 at high rf fields is still open to question. Our approach is
to study the nonlin... | 1309.1706v1 |
2013-12-26 | A Novel High-Pressure Monoclinic Metallic Phase of V2O3 | Vanadium sesquioxide, V2O3, is a prototypical metal-to-insulator system
where, in temperature-dependent studies, the transition always coincides with a
corundum-to-monoclinic structural transition. As a function of pressure, V2O3
follows the expected behavior of increased metallicity due to a larger
bandwidth for press... | 1312.7063v1 |
2014-06-19 | Synthesis of SnTe Nanoplates with {100} and {111} Surfaces | SnTe is a topological crystalline insulator that possesses spin-polarized,
Dirac-dispersive surface states protected by crystal symmetry. Multiple surface
states exist on the {100}, {110}, and {111} surfaces of SnTe, with the band
structure of surface states depending on the mirror symmetry of a particular
surface. Thu... | 1406.5227v1 |
2017-12-13 | High Field (up to 140kOe) Angle Dependent Magneto Transport of Bi2Te3 Single Crystals | We report the angle dependent high field (up to 140kOe) magneto transport of
Bi2Te3 single crystals, a well-known topological insulator. The crystals were
grown from melt of constituent elements via solid state reaction route by
self-flux method. Details of crystal growth along with their brief
characterization up to 5... | 1712.04632v1 |
2018-05-14 | Structural Dependence of Chemical Durability in Modified Aluminoborate Glasses | Alkali and alkaline earth aluminoborate glasses feature high resistance to
cracking under sharp contact loading compared to other oxide glasses. However,
due to the high content of hygroscopic B2O3, it is expected that applications
of these glasses could be hindered by poor chemical durability in aqueous
solutions. Ind... | 1805.05191v1 |
2018-06-12 | Characterization of a depleted monolithic pixel sensors in 150 nm CMOS technology for the ATLAS Inner Tracker upgrade | This work presents a depleted monolithic active pixel sensor (DMAPS)
prototype manufactured in the LFoundry 150\,nm CMOS process. DMAPS exploit high
voltage and/or high resistivity inclusion of modern CMOS technologies to
achieve substantial depletion in the sensing volume. The described device,
named LF-Monopix, was d... | 1806.04400v1 |
2018-06-14 | Demonstration of nonpolar m-plane vertical GaN-on-GaN p-n power diodes grown on free-standing GaN substrates | This work demonstrates the first nonpolar vertical GaN on GaN pn power diodes
grown on m-plane free standing substrates by MOCVD. The SEM and HRXRD results
showed the good crystal quality of the homoepitaxial nonpolar structure with
low defect densities. The CL result confirmed the nonpolar p GaN was of high
quality wi... | 1806.05308v1 |
2019-09-23 | Superconductivity up to 243 K in yttrium hydrides under high pressure | The discovery of high-temperature conventional superconductivity in H3S with
a critical temperature of Tc=203 K was followed by the recent record of Tc ~250
K in the face-centered cubic (fcc) lanthanum hydride LaH10 compound. It was
realized in a new class of hydrogen-dominated compounds having a clathrate-like
crystal... | 1909.10482v1 |
2019-02-26 | Modelling a Transition-Edge Sensor X-ray Microcalorimeter Linear Array for Compton Profile Measurements and Energy Dispersive Diffraction | Transition-edge sensors are a type of superconducting detector that offers
high energy resolution based on their sharp resistance-temperature feature in
the superconducting-to-normal transition. TES X-ray microcalorimeters have
typically been designed and used for spectroscopic applications. In this work,
we present a ... | 1902.10047v2 |
2019-07-14 | Current-Induced magnetization switching by the high spin Hall conductivity $α$-W | The spin Hall effect originating from 5d heavy transition metal thin films
such as Pt, Ta, and W is able to generate efficient spin-orbit torques that can
switch adjacent magnetic layers. This mechanism can serve as an alternative to
conventional spin-transfer torque for controlling next-generation magnetic
memories. A... | 1907.06192v1 |
2020-02-22 | Electron irradiation on multilayer PdSe$_2$ field effect transistors | Palladium diselenide (PdSe2) is a recently isolated layered material that has
attracted a lot of interest for the pentagonal structure, the air stability and
the electrical properties largely tunable by the number of layers. In this
work, PdSe2 is used in the form of multilayer as the channel of back-gate
field-effect ... | 2002.09785v1 |
2020-04-27 | Recent advancements of the NEWS-G experiment | NEWS-G (New Experiments With Spheres-Gas) is an experiment aiming to shine a
light on the dark matter conundrum with a novel gaseous detector, the spherical
proportional counter. It uses light gases, such as hydrogen, helium, and neon,
as targets to expand dark matter searches to the sub-GeV/c$^{2}$ mass region.
NEWS-G... | 2004.12795v1 |
2016-03-02 | Conformal Titanium Nitride in a Porous Silicon Matrix: a Nanomaterial for In-Chip Supercapacitors | Today's supercapacitor energy storages are typically discrete devices aimed
for printed boards and power applications. The development of autonomous sensor
networks and wearable electronics and the miniaturisation of mobile devices
would benefit substantially from solutions in which the energy storage is
integrated wit... | 1603.00798v1 |
2019-02-28 | Effect of atomic ordering on the magnetic anisotropy of single crystal Ni80Fe20 | We investigate the effect of atomic ordering on the magnetic anisotropy of
Ni80Fe20 at.% (Py). To this end, Py films were grown epitaxially on MgO (001)
using dc magnetron sputtering (dcMS) and high power impulse magnetron
sputtering (HiPIMS). Aside from twin boundaries observed in the latter case,
both methods present... | 1903.00105v1 |
2019-03-29 | Multi-contact Phase Change Toggle Logic Device Utilizing Thermal Crosstalk | Phase change memory (PCM) is an emerging high speed, high density, high
endurance, and scalable non-volatile memory technology which utilizes the large
resistivity contrast between the amorphous and crystalline phases of
chalcogenide materials such as Ge2Sb2Te5 (GST). In addition to being used as a
standalone memory, t... | 1904.00836v1 |
2021-01-05 | High-Temperature Superconductivity in Cerium Superhydrides | The discoveries of high-temperature superconductivity in H3S and LaH10 have
excited the search for superconductivity in compressed hydrides. In contrast to
rapidly expanding theoretical studies, high-pressure experiments on hydride
superconductors are expensive and technically challenging. Here we
experimentally discov... | 2101.01315v2 |
2015-07-30 | Likelihood-free inference in high-dimensional models | Methods that bypass analytical evaluations of the likelihood function have
become an indispensable tool for statistical inference in many fields of
science. These so-called likelihood-free methods rely on accepting and
rejecting simulations based on summary statistics, which limits them to low
dimensional models for wh... | 1507.08612v2 |
2019-06-19 | Scalable, green fabrication of single-crystal noble metal films and nanostructures for low-loss nanotechnology applications | High quality metal thin films and nanostructures are critical building blocks
for next generation nanotechnologies. They comprise low-loss circuit elements
in nanodevices, provide new catalytic pathways for water splitting and $CO_2$
reduction technologies, and enable the confinement of spatially extended
electromagnet... | 1906.07879v1 |
2019-10-23 | Implications for Dark Matter Direct Detection in the Presence of LIGO-Motivated Primordial Black Holes | We discuss formation of dark matter (DM) mini-halos around primordial black
holes (PBHs) and its implication on DM direct detection experiments, including
axion searches. Motivated by LIGO observations, we consider $f_{\textrm{DM}}
\simeq 0.01$ as the fraction of DM in PBHs with masses $10 M_{\odot} - 70
M_{\odot}$. In... | 1910.10575v3 |
2020-06-24 | Predicting the propensity for thermally activated $β$ events in metallic glasses via interpretable machine learning | The elementary excitations in metallic glasses (MGs), i.e., $\beta$ processes
that involve hopping between nearby sub-basins, underlie many unusual
properties of the amorphous alloys. A high-efficacy prediction of the
propensity for those activated processes from solely the atomic positions,
however, has remained a dau... | 2006.13552v1 |
2020-10-07 | Physical properties and electronic structure of single-crystal KCo$_2$As$_2$ | We present a method for producing high quality KCo2As2 crystals, stable in
air and suitable for a variety of measurements. X-ray diffraction, magnetic
susceptibility, electrical transport and heat capacity measurements confirm the
high quality and an absence of long range magnetic order down to at least 2 K.
Residual r... | 2010.03447v2 |
2020-10-16 | Investigation of n-type dilute magnetic semiconductor property observed in amorphous AlNO alloy thin film incorporated with dilute nitrogen at 300K | In the present work, a thin film was deposited on quartz substrate by
reactive RF magnetron sputtering of high purity (99.999%) aluminium target
using ultra-high pure (Ar + N2) gas mixture. The percentage ratio of Ar and N2
in the gas mixture was 95% and 5%, respectively. Chemical characterization
using x-ray photoelec... | 2010.08361v1 |
2020-11-03 | In situ mechanical testing of an Al matrix composite to investigate compressive plasticity and failure on multiple length scales | SiC particle-reinforced Al matrix composites exhibit high strength, high wear
resistance, and excellent high-temperature performance, but can also have low
plasticity and fracture toughness, which limits their use in structural
applications. This study investigates the plasticity and failure of such a
composite on mult... | 2011.01390v3 |
2020-12-04 | Revealing the Nanostructure of Mesoporous Fuel Cell Catalyst Supports for Durable, High-Power Performance | Achieving high power performance and durability with low Pt loadings are
critical challenges for proton exchange membrane fuel cells. PtCo catalysts
developed on new carbon black supports show promise by simultaneously providing
good oxygen reduction kinetics and local oxygen transport. We investigate the
role of nanos... | 2012.02879v1 |
2020-12-08 | Complex impedance and Raman spectroscopy of Na$_{0.5}$(Bi$_{1-x}$Dy$_x$)$_{0.5}$TiO$_3$ ceramics | In this work structural refinement, complex impedance spectroscopy, and Raman
spectroscopy have been investigated on
Na$_{0.5}$(Bi$_{1-x}$Dy$_x$)$_{0.5}$TiO$_3$ (xDyNBT) ceramic systems. The pure
NBT, 2DyNBT and 5DyNBT compounds crystallize in a rhombohedral structure while
the 15DyNBT composition crystallizes in an or... | 2012.04325v1 |
2021-02-18 | Characterization of high aspect ratio TiAu TES X-ray microcalorimeters array using the X-IFU Frequency Domain Multiplexing readout | We are developing X-ray microcalorimeters as a backup option for the baseline
detectors in the X-IFU instrument on board the ATHENA space mission led by ESA
and to be launched in the early 2030s.5$\times$5 mixed arrays with TiAu
transition-edge sensor (TES), which have different high aspect ratios and thus
high resista... | 2102.09378v1 |
2021-07-19 | Miniaturization of Josephson junction for digital superconducting circuits | In this work, we briefly overview various options for Josephson junctions
which should be scalable down to nanometer range for utilization in nanoscale
digital superconducting technology. Such junctions should possess high values
of critical current, $I_c$, and normal state resistance, $R_n$. Another
requirement is the... | 2107.08711v1 |
2021-11-18 | Searching for Superconductivity in High Entropy Oxide Ruddlesden-Popper Cuprate Films | In this work, the high entropy oxide A2CuO4 Ruddlesden-Popper
(La0.2Pr0.2Nd0.2Sm0.2Eu0.2)2CuO4 is explored by charge doping with Ce+4 and
Sr+2 at concentrations known to induce superconductivity in the simple parent
compounds, Nd2CuO4 and La2CuO4. Electron doped
(La0.185Pr0.185Nd0.185Sm0.185Eu0.185Ce0.075)2CuO4 and hol... | 2111.09767v1 |
2022-01-03 | Phase Diagram of Infinite-layer Nickelate Compounds from First- and Second-principles Calculations | The fundamental properties of infinite-layer rare-earth nickelates (RNiO2)
are carefully revisited and compared with those of CaCuO2 and RNiO3
perovskites. Combining first-principles and finite-temperature
second-principles calculations, we highlight that bulk NdNiO2 compound are far
from equivalent to CaCuO2, together... | 2201.00709v1 |
2022-03-20 | Deposition temperature dependence of thermo-spin and magneto-thermoelectric conversion in Co$_2$MnGa films on Y$_3$Fe$_5$O$_{12}$ and Gd$_3$Ga$_5$O$_{12}$ | We have characterized Co$_2$MnGa (CMG) Heusler alloy films grown on
Y$_3$Fe$_5$O$_{12}$ (YIG) and Gd$_3$Ga$_5$O$_{12}$ (GGG) substrates at
different deposition temperatures and investigated thermo-spin and
magneto-thermoelectric conversion properties by means of a lock-in thermography
technique. X-ray diffraction, magn... | 2203.10566v2 |
2022-04-10 | Efficient route to achieve superconductivity improvement via substitutional La-Ce alloy superhydride at high pressure | The discovery of clathrate superhydrides has approached the long-standing
dream of room-temperature superconductivity and thus inspired their prosperous
research under high pressure. However, how to experimentally optimize these
compelling superhydrides is still a formidable challenge. Here, we find that
half of the Ce... | 2204.04623v1 |
2022-06-16 | A Lateral AlGaN/GaN Schottky Barrier Diode with 0.36 V Turn-on Voltage and 10 kV Breakdown Voltage by Using Double Barrier Anode Structure | In this letter, we demonstrate a lateral AlGaN/GaN Schottky barrier diode
(SBD) on sapphire substrate with low turn-on voltage (Von) and high breakdown
voltage (VBK). By using a double barrier anode (DBA) structure formed by the
mixture of Platinum (Pt) and Tantalum (Ta), the Von of the SBD can be as low as
0.36 V with... | 2206.07881v1 |
2022-07-08 | Synthesis and Superconductivity in yttrium superhydrides under high pressure | The flourishing rare earth superhydrides are a class of recently discovered
materials that possess near-room-temperature superconductivity at high
pressures, opening a new era of superconductivity research at high pressures.
Among these superhydrides, yttrium superhydrides attracted great interest owing
to their abunda... | 2207.03918v1 |
2022-08-31 | Pouch cells with 15% silicon calendar-aged for 4 years | Small amounts of high-capacity silicon-based materials are already used in
the anode of commercial Li-ion batteries, helping increase their energy
density. Despite their remarkable storage capability, silicon continuously
reacts with the electrolyte, accelerating time-dependent cell performance fade.
Nevertheless, very... | 2209.00138v1 |
2022-10-13 | Diffusion mechanism and electrochemical investigation of 1T phase Al-MoS$_{2}$@rGO nano-composite as a high-performance anode for sodium-ion batteries | We report the electrochemical investigation of 5% Al doped MoS$_2$@rGO
composite as a high-performance anode for sodium (Na)-ion batteries. The x-ray
diffraction (XRD), Raman spectroscopy and high-resolution transmission electron
microscopy characterizations reveal that the Al doping increase the interlayer
spacing of ... | 2210.06735v1 |
2022-11-02 | Discovery of a high-temperature antiferromagnetic state and transport signatures of exchange interactions in a Bi2Se3/EuSe heterostructure | Spatial confinement of electronic topological surface states (TSS) in
topological insulators poses a formidable challenge because TSS are protected
by time-reversal symmetry. In previous works formation of a gap in the
electronic spectrum of TSS has been successfully demonstrated in topological
insulator/magnetic mater... | 2211.01211v1 |
2022-11-09 | Evolution of the strange-metal scattering in momentum space of electron-doped ${\rm La}_{2-x}{\rm Ce}_x{\rm CuO}_4$ | The linear-in-temperature resistivity is one of the important mysteries in
the strange metal state of high-temperature cuprate superconductors. To uncover
this anomalous property, the energy-momentum-dependent imaginary part of the
self-energy Im ${\rm \Sigma}(k, \omega)$ holds the key information. Here we
perform syst... | 2211.04833v1 |
2023-03-30 | Physics-based bias-dependent compact modeling of 1/f noise in single- to few- layer 2D-FETs | 1/f noise is a critical figure of merit for the performance of transistors
and circuits. For two-dimensional devices (2D-FETs), and especially for
applications in the GHz range where short-channel FETs are required, velocity
saturation (VS) effect can result in the reduction of 1/f noise at high
longitudinal electric f... | 2303.17162v1 |
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