publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
|---|---|---|---|
2022-04-26 | Nonreciprocal electrical transport in multiferroic semiconductor (Ge,Mn)Te | We have investigated the nonreciprocal electrical transport, that is a
nonlinear resistance effect depending on the current direction, in multiferroic
Rashba semiconductor (Ge,Mn)Te. Due to coexistence of ferromagnetic and
ferroelectric orders, (Ge,Mn)Te provides a unique platform for exploring the
nonreciprocal electr... | 2204.12427v1 |
2022-08-17 | Transport properties of dipole skyrmions in amorphous FeGd multilayers | The transport response of dipole skyrmions in amorphous centrosymmetric Fe/Gd
multilayer is investigated by temperature and field-dependent resistivity
measurements collected in three current and magnetic field configurations. It
is shown that a dipole skyrmion lattice phase may form at certain temperatures
leading to ... | 2208.08487v1 |
2023-01-18 | Synthesizing $2h/e^2$ resistance plateau at the first Landau level confined in a quantum point contact | A comprehensive understanding of quantum Hall edge transmission, especially
the hole-conjugate of a Laughlin state such as a $2/3$ state, is critical for
advancing fundamental quantum Hall physics and enhancing the design of quantum
Hall edge interferometry. In this study, we report a robust intermediate
$2h/e^2$ resis... | 2301.07488v2 |
2024-02-28 | Impact of etches on thin-film single-crystal niobium resonators | A single crystal niobium thin film was grown using molecular beam epitaxy on
a c-plane sapphire wafer. Several samples were fabricated into dc resistivity
test devices and coplanar waveguide resonator chips using the same
microfabrication procedures and solvent cleans. The samples were then subject
to different acid cl... | 2402.18051v1 |
2024-05-02 | Optimization of reactively sputtered Mn3GaN films based on resistivity measurements | Mn-based nitrides with antiperovskite structures have several properties that
can be utilised for antiferromagnetic spintronics. Their magnetic properties
depend on the structural quality, composition and doping of the cubic
antiperovskite structure. Such nitride thin films are usually produced by
reactive physical vap... | 2405.01203v1 |
2004-02-04 | A simple estimate of the electron hopping energy in the Bechgaard salts | Starting from a previously derived theoretical expression for the electrical
conductivity of the Bechgaard salts,and experimental data on the resistivity of
these materials,it is shown how a valueof the electron hopping energy can be
determined.Values obtained in this way are in agreement with estimates made by
more co... | 0402127v1 |
2019-09-12 | Gallium Nitride FET Model | We have presented an analytical physics-based compact model of GaN power FET,
which can accurately describe the I-V characteristics in all operation modes.
The model considers the source-drain resistance, different interface trap
densities and self-heating effects. | 1909.05702v1 |
2019-09-18 | A current-voltage characteristic of photoresistance. A plane case | The formation of photo-electron current in the volume of semi-conductor
material is investigated in this article. A plane case when a material is
uniformly illuminated by light is considered. The current-voltage
characteristic of a photo resistance is obtained in analytical form. | 1909.09135v1 |
2019-10-04 | The Test of Topological Property of YbB6 | Topological insulator is a recently discovered class of material with
topologically protected surface state. YbB6 is predicted to be moderately
correlated Z2 topological insulator similar to SmB6. Here, I experimentally
test the resistance property of bulk YbB6 to verify its topological property.
By changing the thickn... | 1910.02056v1 |
2020-01-25 | Exfoliation of Two-Dimensional Nanosheets of Metal Diborides | The metal diborides are a class of ceramic materials with crystal structures
consisting of hexagonal sheets of boron atoms alternating with planes of metal
atoms held together with mixed character ionic/covalent bonds. Many of the
metal diborides are ultrahigh temperature ceramics like HfB$_2$, TaB$_2$, and
ZrB$_2$, wh... | 2001.09237v1 |
2005-10-07 | Collective Spin and Charge Excitations in (Sr,La)_{14-x}Ca_xCu_{24}O_{41} Quantum Spin Ladders | We study magnetic and electronic properties of two-leg ladder materials. We
observed a two-magnon (2M) resonance which we analyze in terms of symmetry,
relaxation and resonance properties. Our findings were contrasted to 2M Raman
measurements in other magnetic crystals. This comparison made us suggest that
the spin-spi... | 0510193v1 |
2009-02-13 | Nanoscale Electronic Inhomogeneity in In2Se3 Nanoribbons Revealed by Microwave Impedance Microscopy | Driven by interactions due to the charge, spin, orbital, and lattice degrees
of freedom, nanoscale inhomogeneity has emerged as a new theme for materials
with novel properties near multiphase boundaries. As vividly demonstrated in
complex metal oxides and chalcogenides, these microscopic phases are of great
scientific ... | 0902.2255v1 |
2009-10-01 | Template engineering of Co-doped BaFe2As2 single-crystal thin films | Understanding new superconductors requires high-quality epitaxial thin films
to explore intrinsic electromagnetic properties, control grain boundaries and
strain effects, and evaluate device applications. So far superconducting
properties of ferropnictide thin films appear compromised by imperfect
epitaxial growth and ... | 0910.0268v1 |
2009-11-19 | Large transport critical currents of powder-in-tube Sr0.6K0.4Fe2As2/Ag superconducting wires and tapes | We report significant transport critical currents firstly achieved in
Sr0.6K0.4Fe2As2 wires and tapes with a Tc = 34 K, which were fabricated through
an in-situ powder-in-tube process. Silver was used as a chemical addition as
well as a sheath material. Transport measurements were performed by a standard
four-probe res... | 0911.3701v1 |
2010-10-05 | Hierarchical formation of bulgeless galaxies: Why outflows have low angular momentum | Using high resolution, fully cosmological smoothed particle hydro-dynamical
simulations of dwarf galaxies in a Lambda cold dark matter Universe, we show
how baryons attain a final angular momentum distribution which allows pure disc
galaxies to form. Blowing out substantial amounts of gas through supernovae and
stellar... | 1010.1004v3 |
2014-02-13 | On the spheroidized carbide dissolution and elemental partitioning in a high carbon bearing steel 100Cr6 | We report on the characterization of high carbon bearing steel 100Cr6 using
electron microscopy and atom probe tomography in combination with
multi-component diffusion simulations (DICTRA). Scanning electron micrographs
show that around 14 vol.% spheroidized carbides are formed during soft
annealing and only 3 vol.% re... | 1402.3315v1 |
2014-05-23 | Proof-of-principle of a new geometry for sampling calorimetry using inorganic scintillator plates | A novel geometry for a sampling calorimeter employing inorganic scintillators
as an active medium is presented. To overcome the mechanical challenges of
construction, an innovative light collection geometry has been pioneered, that
minimises the complexity of construction. First test results are presented,
demonstratin... | 1405.6202v1 |
2015-02-10 | Emergence of the minority hole with high mobility on the electrical transport in the Fe-pnictides Ba(Fe$_{1-x}$Mn$_x$As)$_2$ | In Fe pnictide (Pn) superconducting materials, neither Mn- nor Cr- doping to
the Fe site induces superconductivity, even though hole carriers are generated.
This is in strong contrast with the superconductivity appearing when holes are
introduced by alkali metal substitution on the insulating blocking layers. We
invest... | 1502.02845v3 |
2015-08-16 | Surface States Engineering of Metal/MoS2 Contacts Using Sulfur Treatment for Reduced Contact Resistance and Variability | Variability and lack of control in the nature of contacts between metal/MoS2
interface is a major bottleneck in the realisation of high-performance devices
based on layered materials for several applications. In this letter, we report
on the reduction in Schottky barrier height at metal/MoS2 interface by
engineering th... | 1508.03795v2 |
2016-06-28 | Method for Transferring High-Mobility CVD-Grown Graphene with Perfluoropolymers | The transfer of graphene grown by chemical vapor deposition (CVD) using
amorphous polymers represents a widely implemented method for graphene-based
electronic device fabrication. However, the most commonly used polymer,
poly(methyl methacrylate) (PMMA), leaves a residue on the graphene that limits
the mobility. Here w... | 1606.08802v1 |
2016-10-31 | High Electric Field Carrier Transport and Power Dissipation in Multilayer Black Phosphorus Field Effect Transistor with Dielectric Engineering | This study addresses high electric field transport in multilayer black
phosphorus (BP) field effect transistors (FETs) with self-heating and thermal
spreading by dielectric engineering. Interestingly, we found that multilayer BP
device on a SiO2 substrate exhibited a maximum current density of 3.3 x 10E10
A/m2 at an el... | 1610.09951v1 |
2017-02-02 | High-Pressure Synthesis and Characterization of $β$-GeSe - A Semiconductor with Six-Rings in an Uncommon Boat Conformation | Two-dimensional materials have significant potential for the development of
new devices. Here we report the electronic and structural properties of
$\beta$-GeSe, a previously unreported polymorph of GeSe, with a unique crystal
structure that displays strong two-dimensional structural features.
$\beta$-GeSe is made at h... | 1702.00715v1 |
2017-09-21 | Effect of nanostructure on thermoelectric properties of La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ in 300-600 K range | In oxide materials, nanostructuring effect has been found very promising
approach for the enhancement of \textit{figure-of-merit}, \textit{ZT}. In the
present work, we have synthesized La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ (LSMO) compound
using sol-gel method and samples of crystallite size of 34, 41, and 49 nm were
obtained b... | 1709.07205v2 |
2017-12-17 | Short range order in the quantum XXZ honeycomb lattice material BaCo$_2$(PO$_4$)$_2$ | We present observations of highly frustrated quasi two-dimensional (2D)
magnetic correlations in the honeycomb lattice layers of the S$_{eff}$ = 1/2
compound $\gamma$-BaCo$_2$(PO$_4$)$_2$ ($\gamma$-BCPO). Specific heat shows a
broad peak comprised of two weak kink features at $T_{N1} \sim$ 6 K and $T_{N2}
\sim$ 3.5 K, ... | 1712.06208v2 |
2018-02-22 | Touch Sensors with Overlapping Signals: Concept Investigation on Planar Sensors with Resistive or Optical Transduction | Traditional methods for achieving high localization accuracy on tactile
sensors usually involve a matrix of miniaturized individual sensors distributed
on the area of interest. This approach usually comes at a price of increased
complexity in fabrication and circuitry, and can be hard to adapt to non-planar
geometries.... | 1802.08209v2 |
2018-11-27 | Unifying Description of Competing Orders in Two Dimensional Quantum Magnets | Quantum magnets provide the simplest example of strongly interacting quantum
matter, yet they continue to resist a comprehensive understanding above one
spatial dimension (1D). In 1D, a key ingredient to progress is Luttinger liquid
theory which provides a unified description. Here we explore a promising
analogous fram... | 1811.11186v2 |
2017-03-18 | The Effect of Temperature on Cu-K-In-Se Thin Films | Films of Cu-K-In-Se were co-evaporated at varied K/(K+Cu) compositions and
substrate temperatures (with constant (K+Cu)/In ~ 0.85). Increased Na
composition on the substrate's surface and decreased growth temperature were
both found to favor Cu1-xKxInSe2 (CKIS) alloy formation, relative to
mixed-phase CuInSe2 + KInSe2 ... | 1703.06366v1 |
2019-02-26 | Bonding and oxidation protection of Ti${_2}$AlC and Cr${_2}$AlC for a Ni-based Superalloy | Alumina forming, oxidation and thermal shock resistant MAX phases are of a
high interest for high temperature applications. Herein we report, on bonding
and resulting interactions between a Ni-based superalloy, NSA, and two alumina
forming MAX phases. The diffusion couples Cr${_2}$AlC/Inconel-718/Ti${_2}$AlC
were assem... | 1902.10001v2 |
2020-04-22 | Deformation of micrometer and mm-sized Fe2.4wt.%Si single- and bi-crystals with a high angle grain boundary at room temperature | Plasticity in body-centred cubic (BCC) metals, including dislocation
interactions at grain boundaries, is much less understood than in face-centred
cubic (FCC) metals. At low temperatures additional resistance to dislocation
motion due to the Peierls barrier becomes important, which increases the
complexity of plastici... | 2004.10598v2 |
2022-02-01 | Strong Edge Stress in Molecularly Thin Organic$-$Inorganic Hybrid Ruddlesden$-$Popper Perovskites and Modulations of Their Edge Electronic Properties | Organic$-$inorganic hybrid Ruddlesden$-$Popper perovskites (HRPPs) have
gained much attention for optoelectronic applications due to their high
moisture resistance, good processibility under ambient conditions, and long
functional lifetimes. Recent success in isolating molecularly thin hybrid
perovskite nanosheets and ... | 2202.00296v1 |
2016-03-11 | Quantum Critical Behavior in a Concentrated Ternary Solid Solution | Quantum critical behavior has been associated with some of the most exotic
emergent states of matter including high-temperature superconductivity. Much of
the research into quantum critical point (QCP) physics has been hampered by the
lack of model systems simple enough to be analyzed by theory. Here, we show
that the ... | 1603.03781v1 |
2019-03-09 | Dry transfer method for suspended graphene on lift-off-resist: simple ballistic devices with Fabry-Pérot interference | We demonstrate a fabrication scheme for clean suspended structures using
chemical-vapor-deposition-grown graphene and a dry transfer method on
lift-off-resist-coated substrates to facilitate suspended graphene
nanoelectronic devices for technology applications. It encompasses the demands
for scalable fabrication as wel... | 1903.03780v1 |
2019-12-11 | Quantum oscillations and electronic structures in large Chern number semimetal RhSn | We report the magnetoresistance, Hall effect, de Haas-van Alphen (dHvA)
oscillations and the electronic structures of single crystal RhSn, which is a
typical material of CoSi family holding a large Chern number. The large
unsaturated magnetoresistance is observed with B//[001]. The Hall resistivity
curve indicates that... | 1912.05148v1 |
2019-12-11 | Bulk and Two-dimensional Silver and Copper Monohalides: A Unique Class of Materials with Modest Ionicity/Covalency and Ferroelasticity/Multiferroicity | Silver and copper monohalides can be viewed as a class of compounds in the
neutral zone between predominantly covalent and ionic compounds, thereby
exhibiting neither strong ionicity nor strong covalency. We show ab initio
calculation evidence that silver and copper monohalides entail relatively low
transition barriers... | 1912.05172v1 |
2015-04-14 | Carrier Transport at the Metal-MoS2 Interface | This study illustrates the nature of electronic transport and its transition
from one mechanism to another between a metal electrode and MoS2 channel
interface in a field effect transistor (FET) device. Interestingly,
measurements of the contact resistance (Rc) as a function of temperature
indicate a transition in the ... | 1504.03466v1 |
2018-12-28 | Nanoscale Self-Healing Mechanisms in Shape Memory Ceramics | Shape memory (SM) ceramics, such as yttria-stabilized tetragonal zirconia
(YSTZ), are a unique family of SM materials that offer unique properties
including ultra-high operating temperature, and high resistance to chemical
corrosion and oxidation. However, formation of defects is usually observed in
SM ceramics during ... | 1812.11136v1 |
2019-06-24 | Melting of vortex lattice in magnetic superconductor $\mathrm{Rb}\mathrm{Eu}\mathrm{Fe}_{4}\mathrm{As}_{4}$ | The iron-based superconductors are characterized by strong fluctuations due
to high transition temperatures and small coherence lengths. We investigate
fluctuation behavior in the magnetic iron-pnictide superconductor
$\mathrm{Rb}\mathrm{Eu}\mathrm{Fe}_{4}\mathrm{As}_{4}$ by calorimetry and
transport. We find that the ... | 1906.10236v2 |
2020-01-23 | Magnetic-field-induced robust zero Hall plateau state in MnBi$_2$Te$_4$ Chern insulator | The intrinsic antiferromagnetic topological insulator MnBi2Te4 provides an
ideal platform for exploring exotic topological quantum phenomena. Recently,
the Chern insulator and axion insulator phases have been realized in few-layer
MnBi2Te4 devices at low magnetic field regime. However, the fate of MnBi2Te4 in
high magn... | 2001.08401v2 |
2020-04-14 | Highly Conducting Spaced TiO$_2$ Nanotubes Enable Defined Conformal Coating with Nanocrystalline Nb$_2$O$_5$ and High Performance Supercapacitor Applications | In this work, we report on the electrochemical behavior of nitrided spaced
TiO$_2$ nanotubes conformally coated with a nanocrystalline Nb$_2$O$_5$ layer
and find for these hierarchical structures an excellent supercapacitor
performance. Highly aligned conductive 1D electrodes were obtained by a three
step process: i) g... | 2005.01603v1 |
2020-10-13 | High-pressure synthesis of Ba$_2$RhO$_4$, a rhodate analogue of the layered perovskite Sr-ruthenate | A new layered perovskite-type oxide Ba$_2$RhO$_4$ was synthesized by a
high-pressure technique with the support of convex-hull calculations. The
crystal and electronic structure were studied by both experimental and
computational tools. Structural refinements for powder x-ray diffraction data
showed that Ba$_2$RhO$_4$ ... | 2010.06556v1 |
2021-02-15 | Magic thickness of 25 Å makes periodic metal-insulator transitions | Novel quantum phenomena, including high-temperature superconductivity,
topological properties, and charge/spin density waves, appear in
low-dimensional conductive materials. It is possible to artificially create
low-dimensional systems by fabricating ultrathin films, quantum wires, or
quantum dots with flat interfaces.... | 2102.07323v1 |
2021-06-17 | Synthesis of Murunskite Single Crystals: A Bridge Between Cuprates and Pnictides | Numerous contemporary investigations in condensed matter physics are devoted
to high temperature (high-$T_c$ ) cuprate superconductors. Despite its unique
effulgence among research subjects, the enigma of the high-$T_c$ mechanism
still persists. One way to advance its understanding is to discover and study
new analogou... | 2106.09555v1 |
2021-09-14 | Creep properties and deformation mechanisms of single-crystalline $γ^\prime$-strengthened superalloys in dependence of the Co/Ni ratio | Co-base superalloys are considered as promising high temperature materials
besides the well-established Ni-base superalloys. However, Ni appears to be an
indispensable alloying element also in Co-base superalloys. To address the
influence of the base elements on the deformation behavior, high-temperature
compressive cr... | 2109.06767v1 |
2022-06-29 | Tailoring of rhenium oxidation state in ReOx thin films during reactive HiPIMS deposition process and following annealing | Bulk rhenium trioxide (ReO3) has an unusually high electrical conductivity
and, being nanosized, has promising catalytic properties. However, the
production of pure ReO3 thin films is challenging due to the difficulty to
stabilize rhenium in a 6+ oxidation state. Here we present a novel approach for
the deposition of R... | 2206.14665v1 |
2022-06-02 | A mechanically strong and ductile soft magnet with extremely low coercivity | Soft magnetic materials (SMMs) serve in electrical applications and
sustainable energy supply, allowing magnetic flux variation in response to
changes in applied magnetic field, at low energy loss1. The electrification of
transport, households and manufacturing leads to an increase in energy
consumption due to hysteres... | 2207.05686v1 |
2022-07-26 | Cr$_3$X$_4$ (X=Se, Te) monolayers as new platform to realize robust spin filter, spin diode and spin valve | Two-dimensional ferromagnetic (FM) half-metals are promising candidates for
advanced spintronic devices with small-size and high-capacity. Motivated by
recent report on controlling synthesis of FM Cr$_3$Te$_4$ nanosheet, herein, to
explore the potential application in spintronics, we designed spintronic
devices based o... | 2207.12679v1 |
2022-10-26 | Ion-beam Assisted Sputtering of Titanium Nitride Thin Films | Titanium nitride is a material of interest for many superconducting devices
such as nanowire microwave resonators and photon detectors. Thus, controlling
the growth of TiN thin films with desirable properties is of high importance.
In previous work on niobium nitride, ion beam-assisted sputtering (IBAS)
reduced nitroge... | 2210.15065v3 |
2023-02-14 | MgF$_2$ as an effective additive for improving ionic conductivity of ceramic solid electrolytes | As typical solid-state electrolytes (SSEs),
{Na}$_{1+x}${Zr}$_2${Si}$_{x}${P}$_{3-x}${O}$_{12}$ NASICONs provide an ideal
platform for solid-state batteries (SSBs) that display higher safety and
accommodate higher energy densities. The critical points for achieving SSBs
with higher efficiencies are to improve essential... | 2302.07264v1 |
2023-07-03 | Low temperature dynamic polaron liquid in a manganite exhibiting colossal magnetoresistance | Polarons - fermionic charge carriers bearing a strong companion lattice
deformation - exhibit a natural tendency for self-localization due to the
recursive interaction between electrons and the lattice. While polarons are
ubiquitous in insulators, how they evolve in transitions to metallic and
superconducting states in... | 2307.00718v3 |
2023-09-24 | FeCo Nanowire-Strontium Ferrite Powder Composites for Permanent Magnets with High-Energy Products | Due to the issues associated with rare-earth elements, there arises a strong
need for magnets with properties between those of ferrites and rare-earth
magnets that could substitute the latter in selected applications. Here, we
produce a high remanent magnetization composite bonded magnet by mixing FeCo
nanowire powders... | 2309.13724v1 |
2023-11-01 | Transport and electrical properties of cryogenic thermoelectric FeSb2: the effect of isoelectronic and hole doping | Thermoelectric materials operating at cryogenic temperatures are in high
demand for efficient cooling and power generation in applications ranging from
superconductors to quantum computing. The narrow band-gap semiconductor FeSb2,
known for its colossal Seebeck coefficient, holds promise for such
applications, provided... | 2311.00326v1 |
2023-12-13 | Computational design of NDR tunnel diodes with high peak-to-valley current ratio based on two-dimensional cold metals: The case of NbSi$_2$N$_4$/HfSi$_2$N$_4$/NbSi$_2$N$_4$ lateral heterojunction diode | Cold metals have recently gained attention as a promising platform for
innovative devices, such as tunnel diodes with negative differential resistance
(NDR) and field-effect transistors with subthreshold swings below the
thermionic limit. Recently discovered two-dimensional (2D) MA$_2$Z$_4$ (M = Ti,
Zr, Hf, Nb, Ta; A =... | 2312.08473v2 |
2024-01-29 | Increasing the Collection Efficiency in Selenium Thin-Film Solar Cells Using a Closed-Space Annealing Strategy | Elemental selenium is a promising wide-bandgap ($E_\mathrm{G}\approx$ 1.95
eV) photovoltaic material for the next generation of thin-film solar cells. To
realize high-efficiency selenium solar cells, it is crucial to optimize the
crystallization process of the selenium thin-film photoabsorber. However, the
high vapor p... | 2401.15936v1 |
2024-02-10 | Cylindrical compression of thin wires by irradiation with a Joule-class short pulse laser | Equation of state measurements at Jovian or stellar conditions are currently
conducted by dynamic shock compression driven by multi-kilojoule multi-beam
nanosecond-duration lasers. These experiments require precise design of the
target and specific tailoring of the spatial and temporal laser profiles to
reach the highe... | 2402.06983v1 |
2024-03-04 | Quantum Hall Transport Measurements of Lateral p-n Junctions Formed via Precise Spatial Photodoping of Graphene/hBN Heterostructures | Heterostructures composed of 2-dimensional (2D) materials are spatially dope
in-operando to modify devices for custom functionalities, such as lateral p-n-p
junctions. After optically photodoping an hBN/Graphene/hBN heterostructure,
detailed magnetotransport measurements including quantum Hall transport show
several cl... | 2403.01998v1 |
2020-12-05 | A15 Nb$_3$Si -- A "high" Tc superconductor synthesized at a pressure of one megabar and metastable at ambient conditions | A15 Nb$_3$Si is, until now, the only high temperature superconductor produced
at high pressure (~110 GPa) that has been successfully brought back to room
pressure conditions in a metastable condition. Based on the current great
interest in trying to create metastable-at-room-pressure high temperature
superconductors pr... | 2012.02905v2 |
2006-03-17 | Second Core Formation and High Speed Jets: Resistive MHD Nested Grid Simulations | The stellar core formation and high speed jets driven by the formed core are
studied by using three-dimensional resistive MHD nested grid simulations.
Starting with a Bonnor-Ebert isothermal cloud rotating in a uniform magnetic
field, we calculate the cloud evolution from the molecular cloud core (n = 10^6
cm^-3, r_c =... | 0603456v1 |
2018-05-07 | Appearance of ferromagnetism property for Si nano-polycrystalline body and vanishing of electrical resistances at local high frequencies | Reduction in the skin effect for the sintered Si nanopolycrystalline body as
an electricity conductor at a high frequency due to its nano-structure was
studied. Singular vanishing of electrical resistances near a local high
magnetic harmonic frequency of a few MHz was observed. This phenomenon has not
been observed for... | 1805.02312v1 |
2019-03-26 | The micro-RWELL layouts for high particle rate | The $\mu$-RWELL is a single-amplification stage resistive Micro-Pattern
Gaseous Detector (MPGD). The detector amplification element is realized with a
single copper-clad polyimide foil micro-patterned with a blind hole (well)
matrix and embedded in the readout PCB through a thin Diamond-Like-Carbon (DLC)
sputtered resi... | 1903.11017v2 |
2018-04-15 | $\mathrm{Co_2Fe_{1-x}Cr_xSi}$ Heusler Alloys : A promising material for spintronics application | In this article, we investigated the effect of Cr substitution in place of Fe
on the structural, magnetic and transport properties of $\mathrm{Co_2FeSi}$
alloy. A comprehensive structural analysis is done using X-ray diffraction
(XRD) and extended X-ray absorption fine structure (EXAFS) spectroscopy.
Quaternary Heusler... | 1804.05321v1 |
2021-10-16 | Giant magnetoresistance and topological Hall effect in the EuGa4 antiferromagnet | We report on systematic temperature- and magnetic field-dependent studies of
the EuGa$_4$ binary compound, which crystallizes in a centrosymmetric
tetragonal BaAl$_4$-type structure with space group $I4/mmm$. The electronic
properties of EuGa$_4$ single crystals, with an antiferromagnetic (AFM)
transition at $T_\mathrm... | 2110.08522v1 |
2016-01-09 | Field-induced resistivity plateau and unsaturated negative magnetoresistance in topological semimetal TaSb2 | Several prominent transport properties have been identified as key signatures
of topologicalmaterials. One is the resistivity plateau at low temperatures as
observed in several topological insulators (TIs), another is the negative
magnetoresistance (MR) when the applied magnetic field is parallel to the
current directi... | 1601.02062v1 |
2011-01-31 | Encapsulation and Electronic Control of Epitaxial Graphene by Photosensitive Polymers and UV light | Electronic devices using epitaxial graphene on Silicon Carbide require
encapsulation to avoid uncontrolled doping by impurities deposited in ambient
conditions. Additionally, interaction of the graphene monolayer with the
substrate causes relatively high level of electron doping in this material,
which is rather diffic... | 1101.6014v1 |
2020-11-20 | Phase Transitions in Germanium Telluride Nanoparticle Phase-Change Materials Studied by Time-Resolved X-Ray Diffraction | Germanium telluride (GeTe), a phase-change material, is known to exhibit four
different structural phases: three at room temperature (one amorphous and two
crystalline, $\alpha$ and $\gamma$) and one at high temperature (crystalline
$\beta$). Because transitions between the amorphous and crystalline phases lead
to sign... | 2011.10633v1 |
2022-08-23 | Electrochemical investigation of MoSeTe as an anode for sodium-ion batteries | Sodium ion batteries (SIBs) are considered as an efficient alternative for
lithium-ion batteries (LIBs) owing to the natural abundance and low cost of
sodium than lithium. In this context, the anode materials play a vital role in
rechargeable batteries to acquire high energy and power density. In order to
demonstrate t... | 2208.10911v1 |
2024-05-13 | Reducing the oxygen contamination in conductive (Ti,Zr)N coatings via RF-bias assisted reactive sputtering | Ternary transition metal nitride coatings are promising for many applications
as they can offer improved hardness and oxidation resistance compared to binary
counterparts. A common challenge in the deposition of functional nitride thin
films is oxygen contamination. Even low amounts of oxygen contamination can
adversel... | 2405.07789v1 |
2018-11-03 | Pressure-induced Insulator to Metal Transition of Mixed Valence Compound Ce(O,F)SbS$_{2}$ | Transport properties of Ce$_{0.85}$F0.15SbS$_{2}$ and undoped CeOSbS$_{2}$
under high pressure were investigated experimentally and theoretically.
Electrical resistivity measurements of the Ce$_{0.85}$F0.15SbS$_{2}$ single
crystals were performed under various high pressures using a diamond anvil cell
with boron-doped ... | 1811.01151v1 |
2020-10-22 | A photogrammetric method for target monitoring inside the MEG II detector | An automatic target monitoring method based on photographs taken by a CMOS
photo-camera has been developed for the MEG II detector. The technique could be
adapted for other fixed-target experiments requiring good knowledge of their
target position to avoid biases and systematic errors in measuring the
trajectories of t... | 2010.11576v2 |
2021-02-04 | Disorder-robust high-field superconducting phase of FeSe single crystals | When exposed to high magnetic fields, certain materials manifest an exotic
superconducting (SC) phase that has attracted considerable attention. A
proposed explanation for the origin of the high-field SC phase is the
Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. This state is characterized by
inhomogeneous superconduc... | 2102.02353v2 |
2021-03-03 | On the early stages of precipitation during direct ageing of Alloy 718 | The Ni-based superalloy Alloy 718 is used in aircraft engines as
high-pressure turbine discs and must endure challenging demands on
high-temperature yield strength, creep-, and oxidation-resistance. Nanoscale
$\gamma^{\prime}$- and $\gamma^{\prime \prime}$-precipitates commonly found in
duplet and triplet co-precipitat... | 2103.02763v1 |
2022-06-25 | High-Mobility Tri-Gate $β$-Ga$_2$O$_3$ MESFETs with a Power Figure of Merit over 0.9 GW/cm$^2$ | In this letter, fin-shape tri-gate $\beta$-Ga$_{2}$O$_{3}$ lateral MESFETs
are demonstrated with a high power figure of merit of 0.95 GW/cm$^{2}$ - a
record high for any $\beta$-Ga$_{2}$O$_{3}$ transistor to date. A
low-temperature undoped buffer-channel stack design is developed which
demonstrates record high Hall and... | 2206.12539v2 |
2023-10-22 | Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor | We investigate the thermal expansion and superconducting properties of a
CuAl2-type (tetragonal) superconductor CoZr2 under high pressures. We perform
high-pressure synchrotron X-ray diffraction in a pressure range of 2.9 GPa < P
< 10.4 GPa and discover that CoZr2 exhibits volumetric negative thermal
expansion under hi... | 2310.14254v2 |
2023-10-22 | Superconductivity in the high-entropy ceramics Ti0.2Zr0.2Nb0.2Mo0.2Ta0.2Cx with possible nontrivial band topology | Topological superconductors have drawn significant interest from the
scientific community due to the accompanying Majorana fermions. Here, we report
the discovery of electronic structure and superconductivity in high-entropy
ceramics Ti0.2Zr0.2Nb0.2Mo0.2Ta0.2Cx (x = 1 and 0.8) combined with experiments
and first-princi... | 2310.14271v1 |
2024-03-25 | In situ growth of hydrophilic nickel-cobalt layered double hydroxides nanosheets on biomass waste-derived porous carbon for high-performance hybrid supercapacitors | Rational design and cost-effective fabrication of layered double hydroxides
(LDHs) nanosheets with extraordinary electrochemical performance is a key
challenge for hybrid supercapacitors (HSCs). Herein, we report a facile in situ
growth methodology to eco-friendly synthesize hydrophilic NiCo-LDHs nanosheets
on biomass ... | 2403.16506v1 |
1997-01-08 | Coupling between phonons and intrinsic Josephson oscillations in cuprate superconductors | The recently reported subgap structures observed in the current-voltage
characteristic of intrinsic Josephson junctions in the high-T_c superconductors
Tl_2Ba_2Ca_2Cu_3O_{10+\delta} and Bi_2Sr_2CaCu_2O_{8+\delta} are explained by
the coupling between c-axis phonons and Josephson oscillations. A model is
developed where... | 9701049v2 |
1997-07-17 | Anomalous magnetotransport in wide quantum wells | We present magneto transport experiments of quasi 3D PbTe wide quantum wells.
A plateau-like structure in the Hall resistance is observed, which corresponds
to the Shubnikov de Haas oscillations in the same manner as known from the
quantum Hall effect. The onsets of plateaux in Rxy do not correspond to 2D
filling facto... | 9707173v1 |
1997-07-18 | Edge Channel Dominated Magnetotransport in PbTe Wide Parabolic Quantum Wells | In PbTe wide parabolic quantum wells (WPQW) a plateau-like structure is
observed in the Hall resistance, which corresponds to the Shubnikov-de Haas
oscillations in the same manner as known from the quantum Hall effect. At the
same time a non-local signal is observed which corresponds to the structure in
Rxx and Rxy. We... | 9707188v1 |
1997-10-28 | Investigation of acceptor levels and hole scattering mechanisms in p-gallium selenide by means of transport measurements under pressure | The effect of pressure on acceptor levels and hole scattering mechanisms in
p-GaSe is investigated through Hall effect and resistivity measurements under
quasi-hydrostatic conditions up to 4 GPa. The pressure dependence of the hole
concentration is interpreted through a carrier statistics equation with a
single (nitrog... | 9710296v1 |
1998-12-24 | Electron Correlations in Molecular Systems | A short review of correlated electrons in molecular systems has been
performed. Main attention has been focussed on ET salts, which are the d=2
systems. They show the Mott transition in high temperatures and the transition
from the antiferromagnetic to the superconducting phase in low temperatures,
under a (chemical) p... | 9812392v1 |
1998-12-30 | Giant transverse magnetoresistance in an asymmetric system of three GaAs/AlGaAs quantum wells in a strong magnetic field at room temperature | The giant transverse magnetoresistance is observed in the case of
photoinduced nonequilibrium carriers in an asymmetric undoped system of three
GaAs/AlGaAs quantum wells at room temperature. In a magnetic field of 75 kOe,
the resistance of nanostructure being studied increases by a factor of 1.85.
The magnetoresistance... | 9812426v1 |
1999-03-03 | Non linear flux flow in TiN superconducting thin film | We have studied the superconducting behavior of 100 nm Titanium Nitride (TiN)
thin film in a perpendicular magnetic field. We found a zero field transition
temperature of 4.6 K and a slope in the H-T plane of -0.745 T/K. At 4.2 K, we
have performed careful transport measurements by measuring both the
differential resis... | 9903060v2 |
1999-08-26 | Destruction of the Mott Insulating Ground State of Ca_2RuO_4 by a Structural Transition | We report a first-order phase transition at T_M=357 K in single crystal
Ca_2RuO_4, an isomorph to the superconductor Sr_2RuO_4. The discontinuous
decrease in electrical resistivity signals the near destruction of the Mott
insulating phase and is triggered by a structural transition from the low
temperature orthorhombic... | 9908390v1 |
1999-08-29 | Anomalous microwave response of high-temperature superconducting thin-film microstrip resonator in weak dc magnetic fields | We have studied an anomalous microwave (mw) response of superconducting
YBa_{2}Cu_{3}O_{7-delta} (YBCO) microstrip resonators in the presence of a weak
dc magnetic field, H_{dc}. The surface resistance (R_{s}) and reactance (X_{s})
show a correlated non-monotonic behaviour as a function of H_{dc}. R_{s} and
X_{s} were ... | 9908429v1 |
2000-05-11 | Magnetic Field resulting from non-linear electrical transport in single crystals of charge-ordered Pr$_{0.63}$ Ca$_{0.37}$ MnO$_{3}$} | In this letter we report that the current induced destabilization of the
charge ordered (CO) state in a rare-earth manganite gives rise to regions with
ferromagnetic correlation. We did this experiment by measurement of the I-V
curves in single crystal of the CO system
Pr$_{0.63}$Ca$_{0.37}$MnO$_{3}$ and simultanousl... | 0005194v1 |
2000-06-22 | High field magnetotransport in composite conductors: the effective medium approximation revisited | The self consistent effective medium approximation (SEMA) is used to study
three-dimensional random conducting composites under the influence of a strong
magnetic field {\bf B}, in the case where all constituents exhibit isotropic
response. Asymptotic analysis is used to obtain almost closed form results for
the strong... | 0006351v1 |
2000-08-02 | The Zeno effect and an inter-layer pairing mechanism for high-temperature superconductivity in layered materials | Quantum Zeno Effect (QZE) is the suppression of the inter-subspace transition
by a relatively fast intra-subspace decoherence. Earlier, we had proposed a
QZE-based mechanism for the temperature-dependent normal-state c-axis
resistivity of the layered high-T$_c$ cuprate superconductors in which the
single-particle inter... | 0008023v1 |
2000-12-14 | Electronic Transmission Through Metallic Nanowires: Generalized Scattering Matrix Approach | An easy to implement and powerful method for the solution of 3D scattering
problems that can be well described by Helmholtz equation is presented. The
matrix algebra used provides excellent stability versus the number of junctions
as well as great computational speed. The matrix truncation method yields an
easy single-... | 0012250v1 |
2001-03-16 | Giant Magnetoresistance by Exchange Springs in DyFe$_2$/YFe$_2$ Superlattices | Magnetization and magnetoresistance measurements are reported for
antiferromagnetically coupled DyFe$_2$/YFe$_2$ multilayers in fields up to 23
T. We demonstrate that the formation of short exchange springs (~ 2 nm) in the
magnetically soft YFe$_2$ layers results in a giant magneto-resistance as high
as 32% in the spri... | 0103354v1 |
2001-04-05 | Fractal Nature and Scaling Exponent of Non-Drude Currents in Non-Fermi Liquids | In many oxides of the perovskite and pseudoperovskite families there are
phase transitions between insulating and normal metallic (Fermi liquid) phases
that are separated by an intermediate phase that is often called a non-Fermi
liquid (NFL). The dc resistivity of the intermediate or NFL phase often
exhibits a T temper... | 0104095v1 |
2001-04-06 | Evidence for high inter-granular current flow in single-phase polycrystalline MgB2 superconductor | The distribution of magnetic field in single-phase polycrystalline bulk MgB2
has been measured using a Magneto-Optical (MO) technique for an external
magnetic field applied perpendicular to the sample surface. The MO studies
indicate that an inter-granular current network is readily established in this
material and the... | 0104114v1 |
2002-04-17 | Epitaxial Growth of La$_{1/3}$Sr$_{2/3}$FeO$_3$ thin films by laser ablation | We report on the synthesis of high quality La$_{1/3}$Sr$_{2/3}$FeO$_3$ (LSFO)
thin films using the pulsed laser deposition technique on both SrTiO$_3$ (STO)
and LaAlO$_3$ (LAO) substrates (100)-oriented. From X-Ray diffraction (XRD)
studies, we find that the films have an out-of-plane lattice parameter around
0.3865nm,... | 0204370v1 |
2002-05-24 | The Hall effect and hole densities in high Tc GaMnAs thin films | By studying the Hall effect in a series of low resistivity Ga1-xMnxAs
samples, accurate values for the hole density p, Mn concentration x, and Curie
temperature Tc are obtained over the range 0.015=<x=<0.08. The hole density
corresponds to 90% of the Mn concentration at low x, and has a maximum value of
1.0x10-27 m-3 w... | 0205517v3 |
2002-06-19 | Transport and magnetic properties of LT annealed Ga1-xMnxAs | We present the results of low temperature (LT) annealing studies of
Ga1-xMnxAs epilayers grown by low temperature molecular beam epitaxy in a wide
range of Mn concentrations (0.01<x<0.084). Transport measurements in low and
high magnetic fields as well as SQUID measurements were performed on a wide
range of samples, se... | 0206371v1 |
2002-07-08 | Magnetic behavior of single crystalline Ho$_2$PdSi$_3$ | The magnetic behavior of single-crystal Ho$_2$PdSi$_3$, crystallizing in an
AlB$_2$-derived hexagonal structure, is investigated by magnetic susceptibility
($\chi$) and electrical resistivity ($\rho$) measurements along two directions.
There is no dramatic anisotropy in the high temperature Curie-Weiss parameter
or in ... | 0207199v1 |
2002-10-22 | Unipolar transport and shot noise in metal-semiconductor-metal structures | We carry out a self-consistent analytical theory of unipolar current and
noise properties of metal-semiconductor-metal structures made of highly
resistive semiconductors in the presence of an applied bias of arbitrary
strength. By including the effects of the diffusion current we succeed to study
the whole range of car... | 0210484v1 |
2002-11-14 | Synthesis and Properties of YbB2 | We report temperature and field dependent measurements of the magnetic
susceptibility, specific heat and resistivity of sintered YbB2 pellets,
prepared via two distinct reaction routes, utilizing different temperatures,
pressures and sintering times. Sample behavior is affected by the preparation
procedure, as a conseq... | 0211288v1 |
2003-07-07 | Mn Interstitial Diffusion in (Ga,Mn)As | We present a combined theoretical and experimental study of the ferromagnetic
semiconductor (Ga,Mn)As which explains the remarkably large changes observed on
low temperature annealing. Careful control of the annealing conditions allows
us to obtain samples with ferromagnetic transition temperatures up to 159 K. Ab
init... | 0307140v1 |
2003-07-09 | Direct Observation of Long-Term Durability of Superconductivity in YBa$_2$Cu$_3$O$_7$-Ag$_2$O Composites | We report direct observation of long-term durability of superconductivity of
several YBa$_2$Cu$_3$O$_7$-Ag$_2$O composites that were first prepared and
studied almost 14 years ago [J. J. Lin {\it et al}., Jpn. J. Appl. Phys. {\bf
29}, 497 (1990)]. Remeasurements performed recently on both resistances and
magnetizations... | 0307187v1 |
2003-07-18 | Probing quasiparticle dynamics in Bi2Sr2CaCu2O(8+delta) with a driven Josephson vortex lattice | We show that the flux-flow transport of the Josephson vortex lattice (JVL) in
layered high-temperature superconductors provides a convenient probe for both
components of quasiparticle conductivity, $\sigma_{c}$ and $\sigma_{ab}$. We
found that the JVL flux-flow resistivity, $\rho_{ff}$, in a wide range of
magnetic fiel... | 0307450v1 |
2003-09-02 | The enhancement of phase separation aspect in electron doped manganite Ca0.8Sm0.16Nd0.04MnO3 | The complex lanthanide doping of electron manganites results in enhancement
of various phase separation effects in physical properties of these compounds.
Selecting Ca0.8Sm0.16Nd0.04MnO3 as a model case we show that the first order
structural phase transition from paramagnetic semi-metallic phase into
anti-ferromagneti... | 0309065v1 |
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