publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
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2023-04-03 | CVD Graphene Contacts for Lateral Heterostructure MoS${_2}$ Field Effect Transistors | Intensive research is carried out on two-dimensional materials, in particular
molybdenum disulfide, towards high-performance transistors for integrated
circuits. Fabricating transistors with ohmic contacts is challenging due to the
high Schottky barrier that severely limits the transistors' performance.
Graphene-based ... | 2304.01177v2 |
2023-09-21 | Superconductivity in Compositionally-Complex Cuprates with the YBa$_2$Cu$_3$O$_{7-x}$ Structure | High-temperature superconductivity is reported in a series of
compositionally-complex cuprates with varying degrees of size and spin
disorder. Three compositions of Y-site alloyed YBa$_2$Cu$_3$O$_{7-x}$, i.e.,
(5Y)BCO, were prepared using solid-state methods with different sets of rare
earth ions on the Y-site. Synchro... | 2309.12535v1 |
2023-12-11 | Local laser-induced solid-phase recrystallization of phosphorus-implanted Si/SiGe heterostructures for contacts below 4.2 K | Si/SiGe heterostructures are of high interest for high mobility transistor
and qubit applications, specifically for operations below 4.2 K. In order to
optimize parameters such as charge mobility, built-in strain, electrostatic
disorder, charge noise and valley splitting, these heterostructures require Ge
concentration... | 2312.06267v1 |
2023-03-13 | Unusual magnetotransport and anomalous Hall effect in quasi-two-dimensional van der Waals ferromagnet Fe$_4$GeTe$_2$ | Fe$_4$GeTe$_2$, an itinerant vdW ferromagnet (FM) having Curie temperature
(T$_C$) close to room temperature ($\sim 270$ K), exhibits another transition
(T$_{SR}$ $\sim$ 120 K) where the easy axis of magnetization changes from
in-plane to the out-of-plane direction in addition to T$_C$. Here, we have
studied the magnet... | 2303.07440v1 |
2020-03-04 | Adaptive phase field modelling of crack propagation in orthotropic functionally graded materials | In this work, we extend the recently proposed adaptive phase field method to
model fracture in orthotropic functionally graded materials (FGMs). A recovery
type error indicator combined with quadtree decomposition is employed for
adaptive mesh refinement. The proposed approach is capable of capturing the
fracture proce... | 2003.04689v1 |
2020-09-04 | Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag | Newest developments in nuclear fission and fusion technology as well as
planned long-distance space missions demand novel materials to withstand harsh,
irradiative environments. Radiation-induced hardening and embrittlement are a
concern that can lead to failure of materials deployed in these applications.
Here the und... | 2009.02039v1 |
2021-03-05 | Effect of spoke design and material nonlinearity on non-pneumatic tire stiffness and durability performance | Non-pneumatic tire has been widely used due to their advantages of no
run-flat, no need of air maintenance, low rolling resistance, and improvement
of passengers comfort due to its better shock absorption. It has variety of
application in the military vehicle, earthmovers, lunar rover, stair climbing
vehicles etc. Rece... | 2103.03637v1 |
2023-01-24 | Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials | The Seebeck-driven transverse thermoelectric generation in
magnetic/thermoelectric hybrid materials (STTG) has been investigated in
all-bulk hybrid materials. The transverse thermopower in a ferromagnetic
Co$_2$MnGa/thermoelectric $n$-type Si hybrid bulk material with the adjusted
dimensions reaches 16.0 $\mu$V/K at ro... | 2301.09903v1 |
2023-01-24 | Accelerate & Actualize: Can 2D Materials Bridge the Gap Between Neuromorphic Hardware and the Human Brain? | Two-dimensional (2D) materials present an exciting opportunity for devices
and systems beyond the von Neumann computing architecture paradigm due to their
diversity of electronic structure, physical properties, and atomically-thin,
van der Waals structures that enable ease of integration with conventional
electronic ma... | 2301.10277v1 |
2023-07-19 | Emergence of high-temperature superconducting phase in the pressurized La3Ni2O7 crystals | The recent report of pressure-induced structure transition and signature of
superconductivity with Tc = 80 K above 14 GPa in the La3Ni2O7 crystals has
garnered considerable attention. To further elaborate this discovery, we
carried out comprehensive resistance measurements on the La3Ni2O7 crystals
grown with the optica... | 2307.09865v1 |
2023-07-27 | High-temperature superconductivity with zero-resistance and strange metal behavior in La$_{3}$Ni$_{2}$O$_{7-δ}$ | Recently signatures of superconductivity were observed close to 80 K in \LN\
under pressure. This discovery positions \LN\ as the first bulk nickelate with
high-temperature superconductivity, but the lack of zero resistance presents a
significant drawback for validating the findings. Here we report pressure
measurement... | 2307.14819v2 |
2023-08-04 | Stopping microfluidic flow | We present a cross-comparison of three stop-flow configurations--such as
low-pressure (LSF), high-pressure open-circuit (OC-HSF), and high-pressure
short-circuit (SC-HSF) stop-flow--to rapidly bring a high flow velocity within
a microchannel to a standstill. The average velocities inside the microchannels
were reduced ... | 2308.02386v2 |
2009-06-02 | The Evolution of Gas Clouds Falling in the Magnetized Galactic Halo: High Velocity Clouds (HVCs) Originated in the Galactic Fountain | In the Galactic fountain scenario, supernovae and/or stellar winds propel
material into the Galactic halo. As the material cools, it condenses into
clouds. By using FLASH three-dimensional magnetohydrodynamic simulations, we
model and study the dynamical evolution of these gas clouds after they form and
begin to fall t... | 0906.0613v1 |
2018-10-30 | THz-TDS time-trace analysis for the extraction of material and metamaterial parameters | We report on a method and an associated open source software, Fit@TDS,
working on an average personal computer. The method is based on the fitting of
a time-trace data of a terahertz time-domain-spectroscopy system enabling the
retrieval of the refractive index of a dielectric sample and the resonance
parameters of a m... | 1810.12567v4 |
2020-05-28 | Graphene-TiS$_3$ heterojunction for selective polar vapor sensing at room temperature | In this work, the room temperature polar vapor sensing behavior of two
dimentional (2D) heterojunction Graphene-TiS3 materials and TiS3 nanoribbons is
investigated. TiS3 nanoribbons were synthesized via chemical vapor transport
(CVT) and their structure was investigated by scanning electron microscopy
(SEM), high resol... | 2005.14245v1 |
2022-01-06 | A quantitative assessment of Imaging High-Z and Medium-Z materials using Muon Scattering Tomography | Muon Scattering Tomography (MST) has been shown to be a powerful technique
for the non-invasive imaging of high-shielded objects. We present here the
application of the MST technique to investigate two types of nuclear waste
packages, a small-steel drum and a large nuclear waste cask, namely, a CASTOR
V/52. We have dev... | 2201.01877v3 |
2023-03-07 | Stacking disorder and thermal transport properties of $α$-RuCl$_3$ | $\alpha$-RuCl$_3$, a well-known candidate material for Kitaev quantum spin
liquid, is prone to stacking disorder due to the weak van der Waals bonding
between the honeycomb layers. After a decade of intensive experimental and
theoretical studies, the detailed correlation between stacking degree of
freedom, structure tr... | 2303.03682v2 |
2023-12-27 | Combined effect of SiC and carbon on sintering kinetics, microstructure and mechanical properties of fine-grained binderless tungsten carbide | The study investigates the density, phase composition, microstructure and
mechanical properties (microhardness, fracture toughness) of binderless WC +
SiC and WC + SiC + C ceramics obtained by Spark Plasma Sintering (SPS).
Nanopowders of a-WC produced by DC arc plasma chemical synthesis were used as
raw materials. Powd... | 2312.16579v1 |
2022-07-26 | Hysteresis-Free High Mobility Graphene Encapsulated in Tungsten Disulfide | High mobility is a crucial requirement for a large variety of electronic
device applications. The state-of-the-art for high quality graphene devices is
based on heterostructures made with graphene encapsulated in $>80\,$nm-thick
flakes of hexagonal boron nitride (hBN). Unfortunately, scaling up multilayer
hBN while pre... | 2207.12836v1 |
2000-06-23 | Temperature-Dependence of the Resistivity of a Dilute 2D Electron System in High Parallel Magnetic Field | We report measurements of the resistance of silicon MOSFETs as a function of
temperature in high parallel magnetic fields where the 2D system of electrons
has been shown to be fully spin-polarized. A magnetic field suppresses the
metallic behavior observed in the absence of a magnetic field. In a field of
10.8 T, insul... | 0006379v4 |
2002-10-08 | Resistivity of dilute 2D electrons in an undoped GaAs heterostructure | We report resistivity measurements from 0.03 K to 10 K in a dilute high
mobility 2D electron system. Using an undoped GaAs/AlGaAs heterojunction in a
gated field-effect transistor geometry, a wide range of densities, $0.16 \times
10^{10} {cm}^{-2}$ to $7.5 \times 10^{10} {cm}^{-2}$, are explored. For high
densities, th... | 0210155v1 |
2003-09-11 | Superconductivity on the localization threshold and magnetic-field-tuned superconductor-insulator transition in TiN films | Temperature- and magnetic-field dependent measurements of the resistance of
ultrathin superconducting TiN films are presented. The analysis of the
temperature dependence of the zero field resistance indicates an underlying
insulating behavior, when the contribution of Aslamasov-Larkin fluctuations is
taken into account... | 0309281v2 |
2003-10-02 | Electrical resistivity of the Ti4O7 Magneli phase under high pressure | We have measured resistivity as a function of temperature and pressure of
Ti4O7 twinned crystals using different contact configurations. Pressures over
4kbar depress the localization of bipolarons and allow the study of the
electrical conduction of the bipolaronic phase down to low temperatures. For
pressures P > 40 kb... | 0310048v1 |
2004-03-17 | Interaction Correction to the Longitudinal Conductivity and Hall Resistivity in High Quality Two-Dimensional GaAs Electron and Hole Systems | We present a systematic study of the corrections to both the longitudinal
conductivity and Hall resistivity due to electron-electron interactions in high
quality GaAs systems using the recent theory of Zala et al. [Phys. Rev. B 64,
214204 (2001)]. We demonstrate that the interaction corrections to the
longitudinal cond... | 0403411v1 |
2005-05-19 | Universal scaling behavior of the c-axis resistivity of high-temperature superconductors | We propose and show that the c-axis transport in high-temperature
superconductors is controlled by the pseudogap energy and the c-axis
resistivity satisfies a universal scaling law in the pseudogap phase. We
derived approximately a scaling function for the c-axis resistivity and found
that it fits well with the experim... | 0505480v2 |
2006-07-27 | Effect of DC electric field on longitudinal resistance of two dimensional electrons in a magnetic field | The effect of a DC electric field on the longitudinal resistance of highly
mobile two dimensional electrons in heavily doped GaAs quantum wells is studied
at different magnetic fields and temperatures. Strong suppression of the
resistance by the electric field is observed in magnetic fields at which the
Landau quantiza... | 0607741v1 |
2009-05-07 | Correlation between linear resistivity and Tc in organic and pnictide superconductors | A linear temperature dependence of the electrical resistivity as T -> 0 is
the hallmark of quantum criticality in heavy-fermion metals and the archetypal
normal-state property of high-Tc superconductors, yet in both cases it remains
unexplained. We report a linear resistivity on the border of spin-density-wave
order in... | 0905.0964v1 |
2010-02-25 | Signatures of pressure induced superconductivity in insulating Bi2212 | We have performed several high pressure electrical resistance experiments on
Bi1.98Sr2.06Y0.68Cu2O8, an insulating parent compound of the high-Tc Bi2212
family of copper oxide superconductors. We find a resistive anomaly, a downturn
at low temperature, that onsets with applied pressure in the 20-40 kbar range.
Through ... | 1002.4672v1 |
2010-05-10 | Analysis and Design of Ultra Thin Electromagnetic Absorbers Comprising Resistively Loaded High Impedance Surfaces | High-Impedance Surfaces (HIS) comprising lossy Frequency Selective Surfaces
(FSS) are employed to design thin electromagnetic absorbers. The structure,
despite its typical resonant behavior, is able to perform a very wideband
absorption in a reduced thickness. Losses in the frequency selective surface
are introduced by... | 1005.1553v1 |
2011-07-05 | Resistive Solutions for Pulsar Magnetospheres | The current state of the art in the modeling of pulsar magnetospheres invokes
either the vacuum or force-free limits for the magnetospheric plasma. Neither
of these limits can simultaneously account for both the plasma currents and the
accelerating electric fields that are needed to explain the morphology and
spectra o... | 1107.0979v2 |
2011-11-02 | Development and Performance of spark-resistant Micromegas Detectors | The Muon ATLAS MicroMegas Activity (MAMMA) focuses on the development and
testing of large-area muon detectors based on the bulk-Micromegas technology.
These detectors are candidates for the upgrade of the ATLAS Muon System in view
of the luminosity upgrade of Large Hadron Collider at CERN (sLHC). They will
combine tri... | 1111.0426v1 |
2011-11-09 | Nonequilibrium phenomena in high Landau levels | Developments in the physics of 2D electron systems during the last decade
have revealed a new class of nonequilibrium phenomena in the presence of a
moderately strong magnetic field. The hallmark of these phenomena is
magnetoresistance oscillations generated by the external forces that drive the
electron system out of ... | 1111.2176v3 |
2011-12-12 | Resistivity Calculations for Cuprate Superconductor Systems using an Electronic Phase Separation | The resistivity as function of temperature of high temperature
superconductors is very unusual and despite its importance lacks an unified
theoretical explanation. It is linear with the temperature for overdoped
compounds but it falls more quickly as the doping level decreases, and for
weakly doped samples it has a min... | 1112.2631v1 |
2017-11-19 | Global current circuit structure in a resistive pulsar magnetosphere model | Pulsar magnetospheres have strong magnetic fields and large amounts of
plasma. The structures of these magnetospheres are studied using force-free
electrodynamics. To understand pulsar magnetospheres, discussions must include
their outer region. However, force-free electrodynamics is limited in it does
not handle dissi... | 1711.07471v1 |
2018-10-10 | Test particles in relativistic resistive magnetohydrodynamics | The Black Hole Accretion Code (BHAC) has recently been extended with the
ability to evolve charged test particles according to the Lorentz force within
resistive relativistic magnetohydrodynamics simulations. We apply this method
to evolve particles in a reconnecting current sheet that forms due to the
coalescence of t... | 1810.04323v2 |
2019-07-07 | First demonstration of 200, 100, and 50 um pitch Resistive AC-Coupled Silicon Detectors (RSD) with 100% fill-factor for 4D particle tracking | We designed, produced, and tested RSD (Resistive AC-Coupled Silicon
Detectors) devices, an evolution of the standard LGAD (Low-Gain Avalanche
Diode) technology where a resistive n-type implant and a coupling dielectric
layer have been implemented. The first feature works as a resistive sheet,
freezing the multiplied ch... | 1907.03314v3 |
2020-09-01 | On resistive spiking of fungi | We study long-term electrical resistance dynamics in mycelium and fruit
bodies of oyster fungi P. ostreatus. A nearly homogeneous sheet of mycelium on
the surface of a growth substrate exhibits trains of resistance spikes. The
average width of spikes is c.~23~min and the average amplitude is c.~1~kOhm.
The distance bet... | 2009.00292v1 |
2020-09-21 | Contact resistance assessment and high-frequency performance projection of black phosphorus field-effect transistor technologies | In this work, an evaluation of the contact quality of black phosphorus (BP)
field-effect transistors (FETs) from different technologies previously reported
is performed by means of an efficient and reliable contact resistance
extraction methodology based on individual device practical characteristics. A
good agreement ... | 2009.09661v3 |
2012-06-25 | Performances of silicone coated high resistive bakelite RPC | Performances of several single gap (gas gap 2 mm) prototype Resistive Plate
Chambers (RPC) made of high resistive ({\rho} \sim 1010 - 1012 {\Omega} cm)
bakelite, commercially available in India have been studied in recent times. To
make the inner electrode surfaces smooth, a thin coating of silicone has been
applied. A... | 1206.5627v1 |
2022-08-18 | Observation of Fermi liquid phase with broken symmetry in a single crystalline nanorod of Pr$_2$Ir$_2$O$_7$ | We report experimental evidence of emergent broken symmetry Fermi liquid
state in an isolated single crystalline nanorod of $\rm Pr_2 Ir_2 O_7$. We find
clear signature of the onset of the Fermi liquid behavior at low temperature
marked by the sign inversion of magnetoresistance from negative at high
temperature, chara... | 2208.08811v1 |
2022-09-16 | Prediction of Cross-Fitness for Adaptive Evolution to Different Environmental Conditions: Consequence of Phenotypic Dimensional Reduction | How adaptive evolution to one environmental stress improves or suppresses
adaptation to another is an important problem in evolutionary biology. For
instance, in microbiology, the evolution of bacteria to be resistant to
different antibiotics is a critical issue that has been investigated as
cross-resistance. In fact, ... | 2209.07756v2 |
2023-09-29 | Pressure-induced superconductivity in polycrystalline La3Ni2O7 | We synthesized polycrystalline La3Ni2O7 samples by using the sol-gel method
without post-annealing under high oxygen pressure, and then measured
temperature-dependent resistivity under various hydrostatic pressures up to
14.5 GPa in a cubic anvil cell apparatus. We find that the density-wave-like
anomaly in resistivity... | 2309.17378v2 |
2005-10-12 | Magnetodielectric effect without multiferroic coupling | The existence of a magnetodielectric (magnetocapacitance) effect is often
used as a test for multiferroic behavior in new material systems. However,
strong magnetodielectric effects can also be achieved through a combination of
magnetoresistance and the Maxwell-Wagner effect, unrelated to multiferroic
coupling. The fac... | 0510313v1 |
2007-09-24 | External Control of a Metal-Insulator Transition in GaMnAs Wires | Quantum transport in disordered ferromagnetic (III,Mn)V semiconductors is
studied theoretically. Mesoscopic wires exhibit an Anderson disorder-induced
metal-insulator transition that can be controlled by a weak external magnetic
field. This metal-insulator transition should also occur in other materials
with large anis... | 0709.3847v2 |
2008-01-28 | Evidence for hyperconductivity and thermal superconductivity | Physical explanation of hyperconductivity and thermal superconductivity
existence is done in given article on the basis of inherent atomic nuclei
oscillations in atoms of materials which are connected with electrons and
phonons and in accordance with the well known Bardeen-Cooper-Schrieffer
superconductivity theory.
... | 0801.4212v1 |
2009-11-24 | The possible superconductivity at 109 K in YBaCuO materials | The new YBaCuO superconductors are synthesized by using the standard solid
state reaction method as Y5-6-11, Y7-9-16, Y5-8-13, Y7-11-18, Y156, Y3-8-11,
and Y13-20-23. We find that all material obtained are shown the Meissner effect
at 77 K. The resistivity measurements are used by the four-probe method .The
Y 7-11-18... | 0911.4524v1 |
2012-12-20 | Thermoelectricity in ternary rare-earth systems | Crystallographic data, Seebeck coefficient, electrical resistance and thermal
conductivity are reported for a large number of rare-earth compounds,
manifestations of the Kondo effect being discussed. In more detail,
thermoelectric properties of Yb3Co4Ge13 and Yb3Co4Sn13 compounds and
Yb2CeCo4Ge13 and Yb2.3La0.7Co4Ge13 ... | 1212.4995v1 |
2015-05-07 | Computer modelling of hafnium doping in lithium niobate | Lithium niobate, LiNbO3, is an important technological material with good
electro-optic, acousto-optic, elasto-optic, piezoelectric and nonlinear
properties. Doping LiNbO3 with hafnium, Hf has been shown to improve the
resistance of the material to optical damage. Computer modelling provides a
useful means of determini... | 1505.01661v2 |
2022-11-24 | Anisotropic magnetoresistance: materials, models and applications | Resistance of certain (conductive and otherwise isotropic) ferromagnets turns
out to exhibit anisotropy with respect to the direction of magnetisation:
R$_\parallel$ different from R$_\perp$ with reference to the electric current
direction. This century-old phenomenon is reviewed both from the perspective of
materials ... | 2212.03700v2 |
2024-05-15 | The Detection of Unconventional Quantum Oscillations in Insulating 2D Materials | In strongly correlated quantum materials, electrons behave in ways that often
extend beyond the confines of conventional Fermi-liquid theory. Interesting
results include the observation of low-temperature metallic behavior in systems
that are highly resistive. Here we provide an overview of experiments in which
insulat... | 2405.09666v2 |
1998-06-30 | Transport, optical and electronic properties of the half metal CrO2 | The electronic structure of CrO_2 is critically discussed in terms of the
relation of existing experimental data and well converged LSDA and GGA
calculations of the electronic structure and transport properties of this half
metal magnet, with a particular emphasis on optical properties. We find only
moderate manifestat... | 9806378v1 |
2002-08-14 | Nonlinear microwave response of epitaxial YBaCuO films of varying oxygen content on MgO substrates | We have investigated the nonlinear microwave properties of electron-beam
coevaporated YBaCuO films on MgO, using stripline resonators at 2.3 GHz and
temperatures 1.7-80 K. The oxygen content of the films ranged from strongly
underdoped to overdoped. Above 20 K, the nonlinear response of the resonators
was dominated by ... | 0208285v1 |
2004-04-13 | Quantum Transparency of Anderson Insulator Junctions: Statistics of Transmission Eigenvalues, Shot Noise, and Proximity Conductance | We investigate quantum transport through strongly disordered barriers, made
of a material with exceptionally high resistivity that behaves as an Anderson
insulator or a ``bad metal'' in the bulk, by analyzing the distribution of
Landauer transmission eigenvalues for a junction where such barrier is attached
to two clea... | 0404271v2 |
2004-06-17 | Phase formation of polycrystalline MgB2 at low temperature using nanometer Mg powder | The MgB2 superconductor synthesized in a flowing argon atmosphere using
nanometer magnesium powder as the raw materials, denoted as Nano-MgB2, has been
studied by the technique of in-situ high temperature resistance measurement
(HT-RT measurement). The MgB2 phase is identified to form within the
temperature range of 43... | 0406398v1 |
2004-08-27 | Spin reorientation and in-plane magnetoresistance of lightly doped La_{2-x}Sr_{x}CuO_{4} in magnetic fields up to 55 T | The magnetoresistance (MR) in the in-plane resistivity is measured in
magnetic fields up to 55 T in lightly doped La_{2-x}Sr_{x}CuO_{4} in the N\'eel
state (x = 0.01) and in the spin-glass state (x = 0.03) using high-quality
untwinned single crystals. In both cases, a large negative MR is observed to
appear when the ma... | 0408604v1 |
2005-06-27 | Strong-coupling theory of high-temperature superconductivity and colossal magnetoresistance | We argue that the extension of the BCS theory to the strong-coupling regime
describes the high-temperature superconductivity of cuprates and the colossal
magnetoresistance (CMR) of ferromagnetic oxides if the phonon dressing of
carriers and strong attractive correlations are taken into account. The
long-range Froehlich... | 0506706v3 |
2006-06-05 | Phenomenological theory of current driven exchange switching in ferromagnetic nanojunctions | Phenomenological approach is developed in the theory of spin-valve type
ferromagnetic junctions to describe exchange switching by current flowing
perpendicular to interfaces. Forward and backward current switching effects are
described and they may be principally different in nature. Mobile electron
spins are considere... | 0606102v2 |
2007-02-28 | A local field emission study of partially aligned carbon-nanotubes by AFM probe | We report on the application of Atomic Force Microscopy (AFM) for studying
the Field Emission (FE) properties of a dense array of long and vertically
quasi-aligned multi-walled carbon nanotubes grown by catalytic Chemical Vapor
Deposition on a silicon substrate. The use of nanometric probes enables local
field emission... | 0702682v1 |
2007-11-09 | Defect healing at room temperature in pentacene thin films and improved transistor performance | We report on a healing of defects at room temperature in the organic
semiconductor pentacene. This peculiar effect is a direct consequence of the
weak intermolecular interaction which is characteristic of organic
semiconductors. Pentacene thin-film transistors were fabricated and
characterized by in situ gated four-ter... | 0711.1457v1 |
2008-04-05 | Strain rate effects in the mechanical response of polymer anchored carbon nanotube foams | Super-compressible foam-like carbon nanotube films have been reported to
exhibit highly nonlinear viscoelastic behaviour in compression similar to soft
tissue. Their unique combination of light weight and exceptional electrical,
thermal and mechanical properties have helped identify them as viable building
blocks for m... | 0804.0868v1 |
2008-04-10 | Electrical transport and ferromagnetism in Ga1-xMnxAs synthesized by ion implantation and pulsed-laser melting | We present a detailed investigation of the magnetic and magnetotransport
properties of thin films of ferromagnetic Ga1-xMnxAs synthesized using ion
implantation and pulsed-laser melting (II-PLM). The field and
temperature-dependent magnetization, magnetic anisotropy, temperature-dependent
resistivity, magnetoresistance... | 0804.1612v1 |
2010-01-26 | Signature of checkerboard fluctuations in the phonon spectra of a possible polaronic metal La1.2Sr1.8Mn2O7 | Charge carriers in low-doped semiconductors may distort the atomic lattice
and trap themselves forming so-called small polarons. High carrier
concentrations can lead to short range ordered polarons (large polarons) and
even to long range charge and orbital order. Both systems should be insulating
with a large electrica... | 1001.4636v1 |
2010-04-28 | Synthesis, Structure and Properties of Tetragonal Sr2M3As2O2 (M3 = Mn3, Mn2Cu and MnZn2) Compounds Containing Alternating CuO2-Type and FeAs-Type Layers | Polycrystalline samples of Sr2Mn2CuAs2O2, Sr2Mn3As2O2, and Sr2Zn2MnAs2O2 were
synthesized. Their temperature- and applied magnetic field-dependent
structural, transport, thermal, and magnetic properties were characterized by
means of x-ray and neutron diffraction, electrical resistivity rho, heat
capacity, magnetizatio... | 1004.5038v1 |
2011-06-21 | Transport properties and anisotropy in rare earth doped CaFe2As2 single crystals with Tc above 40 K | In this paper we report the superconductivity above 40 K in the electron
doping single crystal Ca1-xRexFe2As2 (Re = La, Ce, Pr). The x-ray diffraction
patterns indicate high crystalline quality and c-axis orientation. the
resistivity anomaly in the parent compound CaFe2As2 is completely suppressed by
partial replacemen... | 1106.4208v1 |
2012-02-13 | Graphene-on-Diamond Devices with Enhanced Current-Carrying Capacity: Carbon sp2-on-sp3 Technology | Graphene demonstrated potential for practical applications owing to its
excellent electronic and thermal properties. Typical graphene field-effect
transistors and interconnects built on conventional SiO2/Si substrates reveal
the breakdown current density on the order of 1 uA/nm2 (i.e. 10^8 A/cm2) which
is ~100\times la... | 1202.2886v1 |
2012-07-12 | Structure and electronic transport in graphene wrinkles | Wrinkling is a ubiquitous phenomenon in two-dimensional membranes. In
particular, in the large-scale growth of graphene on metallic substrates, high
densities of wrinkles are commonly observed. Despite their prevalence and
potential impact on large-scale graphene electronics, relatively little is
known about their stru... | 1207.2994v1 |
2012-09-06 | Terahertz time-domain spectroscopic ellipsometry: Instrumentation and calibration | We present a new instrumentation and calibration procedure for terahertz
time-domain spectroscopic ellipsometry (THz-TDSE) that is a newly established
characterization technique. The experimental setup is capable of providing
arbitrary angle of incidence in the range of $15^\circ$--$85^\circ$ in the
reflection geometry... | 1209.1294v2 |
2013-05-09 | Fermilab experience of post-annealing losses in SRF niobium cavities due to furnace contamination and the ways to its mitigation: a pathway to processing simplification and quality factor improvement | We investigate the effect of high temperature treatments followed by only
high-pressure water rinse (HPR) of superconducting radio frequency (SRF)
niobium cavities. The objective is to provide a cost effective alternative to
the typical cavity processing sequence, by eliminating the material removal
step post furnace t... | 1305.2182v2 |
2013-06-03 | Electrical switching dynamics and broadband microwave characteristics of VO2 RF devices | Vanadium dioxide is a correlated electron system that features a
metal-insulator phase transition (MIT) above room temperature and is of
interest in high speed switching devices. Here, we integrate VO2 into
two-terminal coplanar waveguides and demonstrate a large resistance modulation
of the same magnitude (>10^3) in b... | 1306.0292v1 |
2013-07-16 | ZnS/Diamond Composite Coatings for Infrared Transmission Applications Formed by the Aerosol Deposition Method | The deposition of nano-crystalline ZnS/diamond composite protective coatings
on silicon, sapphire, and ZnS substrates, as a preliminary step to coating
infrared transparent ZnS substrates from powder mixtures by the aerosol
deposition method is presented. Advantages of the aerosol deposition method
include the ability ... | 1307.4319v1 |
2013-10-01 | Unexpected Giant Superconducting Fluctuation and Anomalous Semiconducting Normal State in NdO1-xFxBi1-yS2 Single Crystals | The BiS2-based superconductors were discovered recently. The
superconductivity has been proved by many other groups. Since the previous
experiments were all done on polycrystalline samples, therefore there remains a
concern whether the superconductivity is really derived from the materials
intrinsically or from some se... | 1310.0377v1 |
2014-06-26 | Electron localization and possible phase separation in the absence of a charge density wave in single-phase 1T-VS$_2$ | We report on a systematic study of the structural, magnetic and transport
properties of high-purity 1T-VS$_2$ powder samples prepared under high
pressure. The results differ notably from those previously obtained by
de-intercalating Li from LiVS$_2$. First, no Charge Density Wave (CDW) is found
by transmission electron... | 1406.6945v1 |
2014-11-07 | Upgrade of the ALICE Inner Tracking System | During the Long Shutdown 2 of the LHC in 2018/2019, the ALICE experiment
plans the installation of a novel Inner Tracking System. It will replace the
current six layer detector system with a seven layer detector using Monolithic
Active Pixel Sensors. The upgraded Inner Tracking System will have
significantly improved t... | 1411.1802v2 |
2014-12-26 | High Pressure Induced Binding Between Linear Carbon Chains and Nanotubes | Recent studies of single-walled carbon nanotubes (CNTs) in aqueous media have
showed that water can significantly affect the tube mechanical properties. CNTs
under hydrostatic compression can preserve their elastic properties up to large
pressure values, while exhibiting exceptional resistance to mechanical
loadings. I... | 1412.7966v1 |
2015-01-29 | Superconducting properties of sulfur-doped iron selenide | The recent discovery of high-temperature superconductivity in single-layer
iron selenide has generated significant experimental interest for optimizing
the superconducting properties of iron-based superconductors through the
lattice modification. For simulating the similar effect by changing the
chemical composition du... | 1501.07346v1 |
2015-09-28 | Thermoelectric properties of rare earth filled type-I like Clathrate, Dy8Al16Si30 | Type-I clathrates with a cage structure are known to be of importance for
thermoelectric applications as the cage can be filled with a guest atom which
leads to reduced thermal conductivity. Among the type-I clathrates, Si-based
alloys are of relevance for high temperature application and most importantly
because they ... | 1509.08277v1 |
2016-01-06 | Observation of quantum Hall plateau-plateau transition and scaling behavior of the zeroth Landau level in graphene p-n-p junctions | We report distinctive magnetotransport properties of a graphene p-n-p
junction prepared by controlled diffusion of metallic contacts. In most cases,
materials deposited on a graphene surface introduce substantial carrier
scattering, which greatly reduces the high mobility of intrinsic graphene.
However, we show that an... | 1601.01155v1 |
2017-02-07 | Resonant spin transfer torque nano-oscillators | Spin transfer torque nano-oscillators are potential candidates for replacing
the traditional inductor based voltage controlled oscillators in modern
communication devices. Typical oscillator designs are based on trilayer
magnetic tunnel junctions which are disadvantaged by low power outputs and poor
conversion efficien... | 1702.01869v1 |
2017-02-18 | Ultralow 1/f Noise in a Heterostructure of Superconducting Epitaxial Cobalt-Disilicide Thin Film on Silicon | High-precision resistance noise measurements indicate that the epitaxial
CoSi$_2$/Si hetero-structures at 150 K and 2 K (slightly above its
superconducting transition temperature $T_c$ of 1.54 K) exhibit an unusually
low 1/f noise level in the frequency range of 0.008-0.2 Hz. This corresponds to
an upper limit of Hooge... | 1702.05566v1 |
2017-06-03 | Electronic in-plane symmetry breaking at field-tuned quantum criticality in CeRhIn5 | Electronic nematics are exotic states of matter where electronic interactions
break a rotational symmetry of the underlying lattice, in analogy to the
directional alignment without translational order in nematic liquid crystals.
Intriguingly such phases appear in the copper- and iron-based superconductors,
and their ro... | 1706.00963v1 |
2017-09-03 | Giant tunnel magnetoresistance with a single magnetic phase-transition electrode | Magnetic phase transition tunnel magnetoresistance (MPT-TMR) effect with a
single magnetic electrode has been investigated by first-principles
calculations. The calculations show that the MPT-TMR of FeRh/MgO/Cu tunnel
junction can be as high as hundreds of percent when the magnetic structure of
FeRh changes from G-type... | 1709.00687v2 |
2017-11-08 | X-ray photoelectron spectroscopy, Magnetotransport and Magnetization study of Nb2PdS5 superconductor | In the present report, we investigate various properties of the Nb2PdS5
superconductor. Scanning electron microscopy displayed slabs like laminar
growth of Nb2PdS5while X-ray photoelectron spectroscopy exhibited the
hybridization of Sulphur (2p) with both Palladium (3d)and Niobium (3d). High
field (140kOe) magneto-tran... | 1711.02830v1 |
2017-11-10 | Thermodynamic Studies of \b{eta}-Ga2O3 Nanomembrane Field-Effect Transistors on a Sapphire Substrate | The self-heating effect is a severe issue for high-power semiconductor
devices, which degrades the electron mobility and saturation velocity, and also
affects the device reliability. On applying an ultrafast and high-resolution
thermoreflectance imaging technique, the direct self-heating effect and surface
temperature ... | 1711.03672v1 |
2018-03-28 | Study of nitrogen ion doping of titanium dioxide films | This study reports on the properties of nitrogen doped titanium dioxide
$TiO_2$ thin films considering the application as transparent conducting oxide
(TCO). Sets of thin films were prepared by sputtering a titanium target under
oxygen atmosphere on a quartz substrate at 400 or 500{\deg}C. Films were then
doped at the ... | 1803.10828v1 |
2018-06-15 | Quantum anomalous Hall multilayers grown by molecular beam epitaxy | Quantum anomalous Hall (QAH) effect is a quantum Hall effect that occurs
without the need of external magnetic field. A system composed of multiple
parallel QAH layers is an effective high Chern number QAH insulator and the key
to the applications of the dissipationless chiral edge channels in low energy
consumption el... | 1806.05923v1 |
2018-09-26 | Rare earth permanent magnets prepared by hot deformation process | Hot deformation process is one of the primary methods to produce anisotropic
rare earth permanent magnets. Firstly, rapidly quenched powder flakes with
nanocrystal structure are condensed into the full dense isotropic precursors by
hot pressing process. And then, the prepared isotropic precursors are hot
deformed to pr... | 1809.09838v1 |
2018-11-05 | SkyLogic - A proposal for a skyrmion logic device | This work proposes a novel logic device (SkyLogic) based on skyrmions, which
are magnetic vortex-like structures that have low depinning current density and
are robust to defects. A charge current sent through a polarizer ferromagnet
(P-FM) nucleates a skyrmion at the input end of an intra-gate FM interconnect
with per... | 1811.02016v1 |
2019-09-06 | Electronic correlation determining correlated plasmons in Sb-doped Bi$_2$Se$_3$ | Electronic correlation is believed to play an important role in exotic
phenomena such as insulator-metal transition, colossal magneto resistance and
high temperature superconductivity in correlated electron systems. Recently, it
has been shown that electronic correlation may also be responsible for the
formation of unc... | 1909.02703v1 |
2020-03-30 | Growth and transport properties of Mg3X2 (X = Sb, Bi) single crystals | The discovery of high thermoelectric performance in n-type polycrystalline
Mg3(Sb,Bi)2 based Zintl compounds has ignited intensive research interest.
However, some fundamental questions concerning the anisotropic transport
properties and the origin of intrinsically low thermal conductivity are still
elusive, requiring ... | 2003.13313v1 |
2017-03-13 | Extremely high magnetoresistance and conductivity in the type-II Weyl semimetals WP2 and MoP2 | The peculiar band structure of semimetals exhibiting Dirac and Weyl crossings
can lead to spectacular electronic properties such as large mobilities
accompanied by extremely high magnetoresistance. In particular, two closely
neighbouring Weyl points of the same chirality are protected from annihilation
by structural di... | 1703.04527v3 |
2017-03-20 | Exceptional Anti-Icing Performance of Self-Impregnating Slippery Surfaces | A heat exchange interface at subzero temperature in a water vapor
environment, exhibits high probability of frost formation due to freezing
condensation, a factor that markedly decreases the heat transfer efficacy due
to the considerable thermal resistance of ice. Here we report a novel strategy
to delay ice nucleation... | 1703.07349v1 |
2019-02-03 | Non-monotonic pressure dependence of high-field nematicity and magnetism in CeRhIn$_5$ | CeRhIn$_5$ provides a textbook example of quantum criticality in a heavy
fermion system: Pressure suppresses local-moment antiferromagnetic (AFM) order
and induces superconductivity in a dome around the associated quantum critical
point (QCP) near $p_{c} \approx 23\,$kbar. Strong magnetic fields also suppress
the AFM o... | 1902.00970v3 |
2020-02-11 | Observation of an antiferromagnetic quantum critical point in high-purity LaNiO$_3$ | Amongst the rare-earth perovskite nickelates, LaNiO$_3$ (LNO) is an
exception. While the former have insulating and antiferromagnetic ground
states, LNO remains metallic and non-magnetic down to the lowest temperatures.
It is believed that LNO is a strange metal, on the verge of an
antiferromagnetic instability. Our wo... | 2002.04159v1 |
2020-09-18 | Nanoscale structural and electrical properties of graphene grown on AlGaN by catalyst-free chemical vapor deposition | The integration of graphene (Gr) with nitride semiconductors is highly
interesting for applications in high-power/high-frequency electronics and
optoelectronics. In this work, we demonstrated the direct growth of Gr on
Al0.5Ga0.5N/sapphire templates by propane (C3H8) chemical vapor deposition
(CVD) at temperature of 13... | 2009.08673v1 |
2017-07-28 | 3D laser printing by ultra-short laser pulses for micro-optical applications: towards telecom wavelengths | Three dimensional (3D) fast (< 0.5 hour) printing of micro-optical elements
down to sub-wavelength resolution over 100 micrometers footprint areas using
femtosecond (fs-)laser oscillator is presented. Using sub-1 nJ pulse energies,
optical vortex generators made of polymerised grating segments with an
azimuthally chang... | 1707.09365v1 |
2017-08-14 | High-Kinetic Inductance Additive Manufactured Superconducting Microwave Cavity | Investigations into the microwave surface impedance of superconducting
resonators have led to the development of single photon counters that rely on
kinetic inductance for their operation. While concurrent progress in additive
manufacturing, `3D printing', opens up a previously inaccessible design space
for waveguide r... | 1708.04273v1 |
2018-08-13 | Ultra-compact graphene plasmonic photodetector with the bandwidth over 110GHz | Graphene-based photodetectors, taking advantage of high carrier mobility and
broadband absorption in graphene, have recently experienced rapid development.
However, their performances with respect to the responsivity and bandwidth are
still limited by either weak light-graphene interaction or large
resistance-capacitan... | 1808.04815v3 |
2019-03-22 | Structure and mechanical behavior of ultrafine-grained aluminum-iron alloy stabilized by nanoscaled intermetallic particles | Ultrafine-grained aluminum alloys offer interesting multifunctional
properties with a combination of high strength, low electrical resistivity, and
low density. However, due to thermally induced grain coarsening, they typically
suffer from an intrinsic poor thermal stability. To overcome this drawback, an
Al-2%Fe alloy... | 1903.09391v1 |
2019-03-27 | Homogeneous hierarchical NiMoO4@NiMoO4 nanostructure as a high-performance anode material for electrochemical energy storage | Here we report the extraordinary electrochemical energy storage capability of
NiMoO4@NiMoO4 homogeneous hierarchical nanosheet-on-nanowire-arrays (SOWAs)
synthesized on nickel substrate by a two-stage hydrothermal process.
Comparatively speaking, the SOWAs electrode displays improved electrochemical
performances than t... | 1903.11513v1 |
2019-04-29 | Type-II Ising superconductivity and anomalous metallic state in macro-size ambient-stable ultrathin crystalline films | Recent emergence of two-dimensional (2D) crystalline superconductors has
provided a promising platform to investigate novel quantum physics and
potential applications. To reveal essential quantum phenomena therein, ultralow
temperature transport investigation on high quality ultrathin superconducting
films is criticall... | 1904.12719v2 |
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