publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
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2020-09-04 | Thermal conductivity of PbTe-CoSb3 bulk polycrystalline composite: the role of microstructure and interface thermal resistance | Systematic experimental and theoretical research on the role of
microstructure and interface thermal resistance on the thermal conductivity of
the PbTe-CoSb3 bulk polycrystalline composite is presented. In particular, the
correlation between the particle size of the dispersed phase and interface
thermal resistance (R_{... | 2009.02190v2 |
2020-09-20 | Development of a computational software in Python, used to study the materials resistance in beams | In this research, we do a software writing in Python to calculate the
efforts, bending moments and deformations in beams of different materials. This
computational tool, that we developed, is of great help in area of
computational physical, more exactly in resistance of materials, which serves
as support for researcher... | 2009.09448v2 |
2022-07-01 | High-throughput analysis of Fröhlich-type polaron models | The electronic structure of condensed matter can be significantly affected by
the electron-phonon interaction, leading to important phenomena such as
electrical resistance, superconductivity or the formation of polarons. This
interaction is often neglected in band structure calculations but can have a
strong impact on ... | 2207.00364v1 |
2013-03-26 | Molecular Memory with Atomically-Smooth Graphene Contacts | We report the use of bilayer graphene as an atomically-smooth contact for
nanoscale devices. A two-terminal Bucky ball (C60) based molecular memory is
fabricated with bilayer graphene as a contact on the polycrystalline nickel
electrode. Graphene provides an atomically-smooth covering over an otherwise
rough metal surf... | 1303.6603v1 |
2020-04-10 | Vortex Dynamics and Dissipation Under High-amplitude Microwave Drive | In this paper, we describe the vortex dynamics under high-amplitude microwave
drive and its effect on the surface resistance of superconductors. The vortex
surface resistance is calculated with a Montecarlo approach, where the vortex
motion equation is solved for a collection of vortex flux lines each
oscillating withi... | 2004.05083v2 |
2015-07-17 | Resistive thrust production can be as crucial as added mass mechanisms for inertial undulatory swimmers | In this paper, we address a crucial point regarding the description of
moderate to high Reynolds numbers aquatic swimmers. For decades, swimming
animals have been classified in two different families of propulsive mechanisms
based on the Reynolds number: the "resistive" swimmers, using local friction to
produce the nec... | 1507.04952v1 |
2022-07-13 | Memristive and tunneling effects in 3D interconnected silver nanowires | Due to their memristive properties nanowire networks are very promising for
neuromorphic computing applications. Indeed, the resistance of such systems can
evolve with the input voltage or current as it confers a synaptic behaviour to
the device. Here, we propose a network of silver nanowires (Ag-NWs) which are
grown i... | 2207.06338v1 |
2011-05-06 | Giant microwave photoresistivity in a high-mobility quantum Hall system | We report the observation of a remarkably strong microwave photoresistivity
effect in a high-mobility two-dimensional electron system subject to a weak
magnetic field and low temperature. The effect manifests itself as a giant
microwave-induced resistivity peak which, in contrast to microwave-induced
resistance oscilla... | 1105.1390v1 |
2014-11-19 | Towards pristine graphene-metal interface and microstructures: Laser assisted direct patterning on Epitaxial graphene | Graphene-metal contact resistance is governed by both intrinsic and extrinsic
factors. Intrinsically, both the density of states bottleneck near the Dirac
point and carrier reflection at the graphene-metal interface lead to a high
contact resistance. Moreover, graphene exhibits insulating behavior for
out-of-the-plane ... | 1411.5114v1 |
2023-11-08 | An attention-based deep learning network for predicting Platinum resistance in ovarian cancer | Background: Ovarian cancer is among the three most frequent gynecologic
cancers globally. High-grade serous ovarian cancer (HGSOC) is the most common
and aggressive histological type. Guided treatment for HGSOC typically involves
platinum-based combination chemotherapy, necessitating an assessment of whether
the patien... | 2311.04769v1 |
2000-08-17 | Development of Gold Contacted Flip-chip Detectors with IMARAD CZT | We present initial results from our evaluation of a gold-contacted pixellated
detector using cadmium zinc telluride substrate produced by IMARAD Imaging
Systems. The Horizontal Bridgman (HB) grown crystals from IMARAD have been
shown to produce high resolution photopeaks, but they are also seen to have
large leakage cu... | 0008275v1 |
1997-09-21 | Microwave properties of $(Pr_xY_{1-x})Ba_2Cu_3O_{7-δ}$ : Influence of magnetic scattering | We report measurements of the surface impedance $Z_s=R_s+iX_s$ of
$(Pr_xY_{1-x})Ba_2Cu_3O_{7-\delta}$, $(x=0,0.15,0.23,0.3,0.4,0.5)$. Increasing
$Pr$ concentration leads to some striking results not observed in samples doped
by non-magnetic constituents. The three principal features of the $R_s(T)$ data
- multiple stru... | 9709232v1 |
1997-12-08 | High frequency magneto-electrodynamics of La_(1-x)Sr_xMnO3 single crystals | The radio frequency (RF) response of La1-xSrxMnO3 single crystals reveal a
variety of features associated with the structural, electronic and magnetic
properties of the system. The resonance technique operating at ~ 4 MHz employed
in this study is sensitive to small changes in both the magnetic susceptibility
and resis... | 9712093v1 |
1999-04-28 | Structure and properties of a novel fulleride Sm6C60 | A novel fulleride Sm6C60 has been synthesized using high temperature solid
state reaction. The Rietveld refinement on high resolution synchrotron X-ray
powder diffraction data shows that Sm6C60 is isostructural with body-centered
cubic A6C60 (A=K, Ba). Raman spectrum of Sm6C60 is similar to that of Ba6C60,
and the freq... | 9904404v1 |
2000-04-10 | Magnetotransport study of the charged stripes in high-T_c cuprates | We present a study of the in-plane and out-of-plane magnetoresistance (MR) in
heavily-underdoped, antiferromagnetic YBa_{2}Cu_{3}O_{6+x}, which reveals a
variety of striking features. The in-plane MR demonstrates a "d-wave"-like
anisotropy upon rotating the magnetic field H within the ab plane. With
decreasing temperat... | 0004135v1 |
2000-07-11 | Grain boundary effects on magnetotransport in bi-epitaxial films of La$_{0.7}$Sr$_{0.3}$MnO$_3$ | The low field magnetotransport of La$_{0.7}$Sr$_{0.3}$MnO$_3$ (LSMO) films
grown on SrTiO$_3$ substrates has been investigated. A high qualtity LSMO film
exhibits anisotropic magnetoresistance (AMR) and a peak in the
magnetoresistance close to the Curie temperature of LSMO. Bi-epitaxial films
prepared using a seed laye... | 0007194v1 |
2001-02-23 | Temperature Dependence of Low-Lying Electronic Excitations of LaMnO_3 | We report on the optical properties of undoped single crystal LaMnO_3, the
parent compound of the colossal magneto-resistive manganites. Near-Normal
incidence reflectance measurements are reported in the frequency range of
20-50,000 cm-1 and in the temperature range 10-300 K. The optical conductivity,
s_1(w), is derive... | 0102437v1 |
2001-02-27 | Anisotropic three-dimentional magnetic fluctuations in heavy fermion CeRhIn5 | CeRhIn5 is a heavy fermion antiferromagnet that orders at 3.8 K. The
observation of pressure-induced superconductivity in CeRhIn5 at a very high Tc
of 2.1 K for heavy fermion materials has led to speculations regarding to its
magnetic fluctuation spectrum. Using magnetic neutron scattering, we report
anisotropic three-... | 0102503v1 |
2001-12-21 | First order transition from ferromagnetism to antiferromagnetism in Ce(Fe$_{0.96}$Al$_{0.04}$)$_2$: a magnetotransport study | The magnetotransport behaviour is investigated in detail across the first
order magnetic phase transition from ferromagnetic to antiferromagnetic state
in polycrystalline Ce(Fe$_{0.96}$Al$_{0.04}$)$_2$ sample. The study clearly
brings out various generic features associated with a first order transition,
viz., hysteres... | 0112408v1 |
2002-08-07 | Transport critical current densities and n factors in mono- and multifilamentary MgB2/Fe tapes and wires using fine powders | Mono- and multifilamentary MgB2/Fe tapes and wires with high transport
critical current densities have been prepared using the powder-in-tube (PIT)
process. The fabrication details are described. The effect of powder grain
sizes and recrystallization temperature on jc has been investigated. At 25K and
1 T, jc values cl... | 0208133v1 |
2004-02-20 | Metal-insulator transition and glassy behavior in two-dimensional electron systems | Studies of low-frequency resistance noise demonstrate that glassy freezing
occurs in a two-dimensional electron system in silicon in the vicinity of the
metal-insulator transition (MIT). The width of the metallic glass phase, which
separates the 2D metal and the (glassy) insulator, depends strongly on
disorder, becomin... | 0402535v1 |
2004-04-21 | Formation and Thermal Stability of sub-10 nm Carbon Templates on Si(100) | We report a lithographic process for creating high-resolution (<10 nm) carbon
templates on Si(100). A scanning electron microscope, operating under low
vacuum (10E-6 mbar), produces a carbon-containing deposit ("contamination
resist") on the silicon surface via electron-stimulated dissociation of ambient
hydrocarbons, ... | 0404505v1 |
2005-04-19 | High temperature magnetic ordering in La2RuO5 | Magnetic susceptibility, heat capacity and electrical resistivity
measurements have been carried out on a new ruthenate, La2RuO5 (monoclinic,
space group P21/c) which reveal that this compound is a magnetic semiconductor
with a high magnetic ordering temperature of 170K. The entropy associated with
the magnetic transit... | 0504489v1 |
2006-05-11 | Multifilament YBa2Cu3O6+x -coated conductors with minimized coupling losses | We report an experimental approach to making multifilament coated conductors
with low losses in applied time-varying magnetic field. Previously, the
multifilament conductors obtained for that purpose by laser ablation suffered
from high coupling losses. Here we report how this problem can be solved. When
the substrate ... | 0605313v1 |
2006-06-17 | The thermally activated motion of vortex bundles and the anomalous Hall effect in type-II conventional and high-Tc superconductors | The anomalous Hall effect in type-II conventional and high-Tc superconductors
is investigated based on the proposed novel theory of the thermally activated
motion of vortex bundles over a directional-dependent energy barrier. Our
calculations demonstrate clearly that anomalous Hall effect is induced by the
competition ... | 0606464v2 |
1999-11-30 | Analysis of trap spectra in LEC and epitaxial GaAs | Different methods of trap parameter measurement are analysed. Transient
photoconductivity and thermally stimulated effects were used to investigate the
influence of traps in LEC SI-GaAs and high resistivity epitaxial GaAs. The
peculiarities of the TSC were analysed and shown to be related to the influence
of crystal mi... | 9911048v1 |
2006-08-25 | The Effects of Preheating of a Fine Tungsten Wire and the Polarity of a High-Voltage Electrode on the Energy Characteristics of an Electrically Exploded Wire in Vacuum | Results obtained from experimental and numerical studies of tungsten wires
electrical explosion in vacuum are presented. The experiments were performed
both with and without preheating of the wires, using positive or negative
polarity of a high-voltage electrode. Preheating is shown to increase energy
deposition in the... | 0608251v1 |
2007-03-11 | A low-noise ferrite magnetic shield | Ferrite materials provide magnetic shielding performance similar to commonly
used high permeability metals but have lower intrinsic magnetic noise generated
by thermal Johnson currents due to their high electrical resistivity.
Measurements inside a ferrite shield with a spin-exchange relaxation-free
atomic magnetometer... | 0703115v2 |
2007-08-14 | The zero-energy state in graphene in a high magnetic field | The fate of the charge-neutral Dirac point in graphene in a high magnetic
field $H$ has been investigated at low temperatures ($T\sim$ 0.3 K). In samples
with small $V_0$ (the gate voltage needed to access the Dirac point), the
resistance $R_0$ at the Dirac point diverges steeply with $H$, signalling a
crossover to an ... | 0708.1959v2 |
2008-03-25 | Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAsO_{1-x}F_x$ | Since the discovery of high-transition temperature ($T_c$) superconductivity
in layered copper oxides, extensive efforts have been devoted to explore the
higher $T_c$ superconductivity. However, the $T_c$ higher than 40 K can be
obtained only in the copper oxide superconductors so far. The highest reported
value of $T_... | 0803.3603v2 |
2008-04-21 | CeFePO: A Heavy Fermion Metal with Ferromagnetic Correlations | The ground state properties of CeFePO, a homologue of the new high
temperature superconductors RFePnO(1-x)Fx, were studied by means of
susceptibility, specific heat, resistivity, and NMR measurements on
polycrystals. All the results demonstrate that this compound is a magnetically
non-ordered heavy Fermion metal with a... | 0804.3250v2 |
2008-07-05 | Growth and characterization of A_{1-x}K_xFe_2As_2 (A = Ba, Sr) single crystals with x=0 - 0.4 | Single crystals of A$_{1-x}$K$_x$Fe$_2$As$_2$ (A=Ba, Sr) with high quality
have been grown successfully by FeAs self-flux method. The samples have sizes
up to 4 mm with flat and shiny surfaces. The X-ray diffraction patterns suggest
that they have high crystalline quality and c-axis orientation. The
non-superconducting... | 0807.0759v3 |
2008-08-18 | A Ni-based Superconductor: the Heusler Compound ZrNi$_2$Ga | This work reports on the novel Heusler superconductor ZrNi2Ga. Compared to
other nickel-based superconductors with Heusler structure, ZrNi2Ga exhibits a
relatively high superconducting transition temperature of Tc=2.9 K and an upper
critical field of 1.5 T. Electronic structure calculations show that this
relatively hi... | 0808.2356v1 |
2008-10-03 | Small anisotropy, weak thermal fluctuations, and high field superconductivity in Co-doped iron pnictide Ba(Fe1-xCox)2As2 | We performed high-field magnetotransport and magnetization measurements on a
single crystal of the 122-phase iron pnictide Ba(Fe1-xCox)2As2. Unlike the HTS
cuprates and 1111-phase oxypnictides, Ba(Fe1-xCox)2As2 showed practically no
broadening of the resistive transitions under magnetic fields up to 45 T. The
mass anis... | 0810.0699v2 |
2009-05-01 | Highly segmented thin microstrip detector with data-driven fast readout | In September 2008 the Slim5 collaboration submitted a low material budget
silicon demonstrator to test with 12 GeV/c protons, at the PS-T9 test-beam at
CERN. Inside the reference telescope, two different detectors were placed as
device under test (DUT). The first was a 4k-Pixel Matrix of Deep N Well MAPS,
developed in ... | 0905.0083v3 |
2009-10-08 | Structural and transport properties of Sr2VO{3-delta}FeAs superconductors with different oxygen deficiencies | Sr2VO{3-delta}FeAs superconductors with different oxygen deficiencies have
been successfully fabricated. It is found that the superconducting transition
temperature drops down monotonically with the increase of oxygen deficiency.
The diminishing of superconductivity is accompanied by the enhancement of
residual resisti... | 0910.1537v2 |
2010-04-22 | Optimizing Transistor Performance of Percolating Carbon Nanotube Networks | In percolating networks of mixed metallic and semiconducting CNTs, there is a
tradeoff between high on-current (dense networks) and high on/off ratio (sparse
networks in which the metallic CNT fraction is not percolating). Experiments on
devices in a transistor configuration and Monte Carlo simulations were
performed t... | 1004.4009v1 |
2010-06-25 | Spin and charge dynamics in [TbPc$_2$]$^0$ and [DyPc$_2$]$^0$ single molecule magnets | Magnetization, AC susceptibility and $\mu$SR measurements have been performed
in neutral phthalocyaninato lanthanide ([LnPc$_2]^0$) single molecule magnets
in order to determine the low-energy levels structure and to compare the
low-frequency spin excitations probed by means of macroscopic techniques, such
as AC suscep... | 1006.4919v1 |
2010-09-17 | Graphene Transport at High Carrier Densities using a Polymer Electrolyte Gate | We report the study of graphene devices in Hall-bar geometry, gated with a
polymer electrolyte. High densities of 6 $\times 10^{13}/cm^{2}$ are
consistently reached, significantly higher than with conventional back-gating.
The mobility follows an inverse dependence on density, which can be correlated
to a dominant scat... | 1009.3367v2 |
2010-10-28 | Poole-Frenkel Effect and Phonon-Assisted Tunneling in GaAs Nanowires | We present electronic transport measurements of GaAs nanowires grown by
catalyst-free metal-organic chemical vapor deposition. Despite the nanowires
being doped with a relatively high concentration of substitutional impurities,
we find them inordinately resistive. By measuring sufficiently high
aspect-ratio nanowires i... | 1010.6086v1 |
2010-11-23 | NaIrO3 - A pentavalent post-perovskite | Sodium iridium(V) oxide, NaIrO3, was synthesized by a high pressure solid
state method and recovered to ambient conditions. It is found to be
isostructural with CaIrO3, the much-studied structural analogue of the
high-pressure post-perovskite phase of MgSiO3. Among the oxide
post-perovskites, NaIrO3 is the first exampl... | 1011.5125v2 |
2010-12-11 | Transport Spin Polarization of High-Curie Temperature MnBi Films | We report on the study of the structural, magnetic and transport properties
of highly textured MnBi films with the Curie temperature of 628K. In addition
to detailed measurements of resistivity and magnetization, we measure transport
spin polarization of MnBi by Andreev reflection spectroscopy and perform fully
relativ... | 1012.2486v1 |
2011-10-06 | High-Precision Tuning of State for Memristive Devices by Adaptable Variation-Tolerant Algorithm | Using memristive properties common for the titanium dioxide thin film
devices, we designed a simple write algorithm to tune device conductance at a
specific bias point to 1% relative accuracy (which is roughly equivalent to
7-bit precision) within its dynamic range even in the presence of large
variations in switching ... | 1110.1393v1 |
2011-10-19 | Evaluating the robustness of top coatings comprising plasma-deposited fluorocarbons in electrowetting systems | Thin dielectric stacks comprising a main insulating layer and a hydrophobic
top coating are commonly used in low voltage electrowetting systems. However,
in most cases, thin dielectrics fail to endure persistent electrowetting
testing at high voltages, namely beyond the saturation onset, as electrolysis
indicates diele... | 1110.4238v1 |
2011-10-21 | P-T phase diagram of iron arsenide superconductor NdFeAsO0.88F0.12 | NdFeAsO0.88F0.12 belongs to the recently discovered family of high-TC
iron-based superconductors. The influence of high pressure on transport
properties of this material has been studied. Contrary to La-based compounds,
we did not observe a maximum in TC under pressure. Under compression, TC drops
rapidly as a linear f... | 1110.4909v1 |
2011-11-20 | Flame Synthesis of Graphene Films in Open Environments | Few-layer graphene (FLG) is grown on copper and nickel substrates at high
rates using a novel flame synthesis method in open-atmosphere environments.
Transmittance and resistance properties of the transferred films are similar to
those grown by other methods, but the concentration of oxygen, as assessed by
XPS, is actu... | 1111.4699v1 |
2012-07-25 | Conductivity crossover in nano-crystalline diamond films: Realization of a disordered superlattice-like structure | We present the electrical transport characteristics of a batch of
nano-crystalline diamond films of varying nitrogen concentrations and explain
the conduction mechanism by the disordered quasi-superlattice model applied to
semiconductor heterostructures. Synthesized by the hot filament chemical vapour
deposition techni... | 1207.5916v1 |
2012-10-23 | Impact of the various spin and orbital ordering processes on multiferroic properties of orthovanadate DyVO3 | The orthovanadate DyVO3 crystal, known to exhibit multiple structural, spin
and orbital ordering transitions, is presently investigated on the basis of
magnetization, heat capacity, resistivity, dielectric and polarization
measurements. Our main result is experimental evidence for the existence of
multiferroicity below... | 1210.6373v3 |
2013-04-04 | Atomic Calligraphy: The Direct Writing of Nanoscale Structures using MEMS | We present a micro-electromechanical system (MEMS) based method for the
resist free patterning of nano-structures. Using a focused ion beam (FIB) to
customize larger MEMS machines, we fabricate apertures as small as 50 nm on
plates that can be moved with nanometer precision over an area greater than
20x20 {\mu}m^2. Dep... | 1304.1334v1 |
2013-04-04 | Substrate-Independent Catalyst-Free Synthesis of High-Purity Bi2Se3 Nanostructures | We describe a catalyst-free vapor-solid synthesis of bismuth selenide
(Bi2Se3) nanostructures at ambient pressure with hydrogen as a carrier gas. The
nanostructures were synthesized on glass, silicon and mica substrates and the
method yields a variety of nanostructures: nanowires, nanoribbons,
nanoplatelets and nanofla... | 1304.1388v1 |
2013-07-14 | Voltage-triggered Ultra-fast Metal-insulator Transition in Vanadium Dioxide Switches | Electrically driven metal-insulator transition in vanadium dioxide (VO2) is
of interest in emerging memory devices, neural computation, and high speed
electronics. We report on the fabrication of out-of-plane VO2
metal-insulator-metal (MIM) structures and reproducible high-speed switching
measurements in these two-term... | 1307.3774v1 |
2013-07-17 | Dielectric Coatings for IACT Mirrors | Imaging Atmospheric Cherenkov Telescopes for very-high energy gamma-ray
astronomy need mirror with high reflectance roughly in the wavelength between
300 and 550 nm. The current standard reflective layer of such mirrors is
aluminum. Being permanently exposed to the environment they show a constant
degradation over the ... | 1307.4557v1 |
2013-08-14 | Perspectives of Micro-Pattern Gaseous Detector Technologies for Future Physics Projects | A centenary after the invention of the basic principle of gas amplification,
gaseous detectors - are still the first choice whenever the large area coverage
with low material budget is required. Advances in photo-lithography and
micro-processing techniques in the chip industry during the past two decades
triggered a ma... | 1308.3047v2 |
2013-08-18 | Pulsed Laser Deposition of High-Quality Thin Films of the Insulating Ferromagnet EuS | High-quality thin films of the ferromagnetic-insulator europium(II) sulfide
(EuS) were fabricated by pulsed laser deposition on Al2O3 (0001) and Si (100)
substrates. A single orientation was obtained with the [100] planes parallel to
the substrates, with atomic-scale smoothness indicates a near-ideal surface
topography... | 1308.3820v2 |
2014-02-19 | Monte Carlo Simulation of RPC-based PET with GEANT4 | The Resistive Plate Chambers (RPC) are low-cost charged-particle detectors
with good timing resolution and potentially good spatial resolution. Using RPC
as gamma detector provides an opportunity for application in positron emission
tomography (PET). In this work, we use GEANT4 simulation package to study
various metho... | 1402.4544v1 |
2014-03-04 | Molecular weight dependent bimolecular recombination in organic solar cells | Charge carrier recombination is studied in operational organic solar cells
made from the polymer:fullerene system PCDTBT:PC71BM
(poly[N-9"-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)]
: [6,6]-phenyl-C$_{70}$-butyric acid methyl ester). A newly developed technique
High Intensity Res... | 1403.0972v2 |
2015-01-27 | Transition from semiconducting to metallic-like conducting and weak antilocalization effect in single crystals of LuPtSb | High quality half-Heusler single crystals of LuPtSb have been synthesized by
a Pb flux method. The temperature dependent resistivity and Hall effects
indicate that the LuPtSb crystal is a p-type gapless semiconductor showing a
transition from semiconducting to metallic conducting at 150 K. Moreover, a
weakly temperatur... | 1501.06714v1 |
2015-05-22 | Synthesis of monoclinic IrTe2 under high pressure and its physical properties | In a pressure-temperature (P-T) diagram for synthesizing IrTe2 compounds, the
well-studied trigonal (H) phase with the CdI2-type structure is stable at low
pressures. The superconducting cubic (C) phase can be synthesized under higher
temperatures and pressures. A rhombohedral phase with the crystal structure
similar t... | 1505.06124v1 |
2015-08-12 | Direct Observation of Re-entrant Multiferroic CuO at High Pressures | We have carried out a detailed experimental investigation on CuO using
dielectric constant, ac resistance, Raman spectroscopy and X-ray diffraction
measurements at high pressures and room temperature. Both dielectric constant
and dielectric loss show an anomalous peak in the pressure range 3.4-4 GPa
indicating a ferroe... | 1508.02874v1 |
2015-10-21 | Titanium Nitride as a Seed Layer for Heusler Compounds | Titanium nitride (TiN) shows low resistivity at room temperature, high
thermal stability and thus has the potential to serve as seed layer in magnetic
tunnel junctions. High quality TiN thin films with regard to the
crystallographic and electrical properties were grown and characterized by
X-ray diffraction and 4-termi... | 1510.06256v3 |
2016-04-19 | Insulating and metallic spin glass in K$_{x}$Fe$_{2-δ-y}$Ni$_{y}$Se$_{2}$ (0.06 $\leq$ $y$ $\leq$ 1.44) single crystals | We report electron doping effects by Ni in
K$_{x}$Fe$_{2-\delta-y}$Ni$_{y}$Se$_{2}$ (0.06 $\leq$ $y$ $\leq$ 1.44) single
crystal alloys. A rich ground state phase diagram is observed. Small amount of
Ni ($\sim$ 4\%) suppressed superconductivity below 1.8 K, inducing insulating
spin glass magnetic ground state for highe... | 1604.05713v1 |
2016-05-16 | Growth and characterization of CaFe$_{1-x}$Co$_x$AsF single crystals by CaAs flux method | Millimeter sized single crystals of CaFe$_{1-x}$Co$_x$AsF were grown using a
self-flux method. It is found that high-quality single crystals can be grown
from three approaches with different initial raw materials. The chemical
compositions and crystal structure were characterized carefully. The c-axis
lattice constant ... | 1605.04642v1 |
2016-06-02 | High Current Density 2D/3D Esaki Tunnel Diodes | The integration of two-dimensional materials such as transition metal
dichalcogenides with bulk semiconductors offer interesting opportunities for
2D/3D heterojunction-based novel device structures without any constraints of
lattice matching. By exploiting the favorable band alignment at the GaN/MoS2
heterojunction, an... | 1606.00509v1 |
2016-06-24 | Thermal insulator transition induced by interface scattering | We develop an effective medium model of thermal conductivity that accounts
for both percolation and interface scattering. This model accurately explains
the measured increase and decrease of thermal conductivity with loading in
composites dominated by percolation and interface scattering, respectively. Our
model furthe... | 1606.07851v2 |
2016-06-29 | Large linear magnetoresistance from neutral defects in Bi$_2$Se$_3$ | The chalcogenide Bi$_2$Se$_3$ can attain the three dimensional (3D) Dirac
semimetal state under the influence of strain and microstrain. Here we report
the presnece of large linear magnetoresistance in such a Bi$_2$Se$_3$ crystal.
The magnetoresistance has quadratic form at low fields which crossovers to
linear above 4... | 1606.09059v1 |
2016-10-03 | Thallium under extreme compression | We present a combined theoretical and experimental study of the high-pressure
behavior of thallium. X-ray diffraction experiments have been carried out at
room temperature up to 125 GPa using diamond-anvil cells, nearly doubling the
pressure range of previous experiments. We have confirmed the hcp-fcc
transition at 3.5... | 1610.00435v1 |
2016-10-19 | Applications and non-idealities of submicron Al-AlOx-Nb tunnel junctions | We have developed a technique to fabricate sub-micron, 0.6 um x 0.6 um
Al-AlOx-Nb tunnel junctions using a standard e-beam resist, angle evaporation
and double oxidation of the tunneling barrier, resulting in high quality
niobium, as determined by the the high measured values of the critical
temperature TC 7.5 K and th... | 1610.05903v1 |
2017-06-28 | Super-Hydrophobic Stearic Acid Layer Formed on Anodized High Purified Magnesium for Improving Corrosion Resistance of Biodegradable Implants | Magnesium and its alloys are ideal candidates for biodegradable implants.
However, they can dissolve too rapidly in the human body for most applications.
In this research, high purified magnesium (HP-Mg) was coated with stearic acid
in order to slow the corrosion rate of magnesium in simulated body fluid at
37{\deg}C. ... | 1706.09508v1 |
2017-10-19 | Design of high-strength refractory complex solid-solution alloys | Nickel-based superalloys and near-equiatomic high-entropy alloys containing
Molybdenum are known for higher temperature strength and corrosion resistance.
Yet, complex solid-solution alloys offer a huge design space to tune for
optimal properties at slightly reduced entropy. For refractory Mo-W-Ta-Ti-Zr,
we showcase KK... | 1710.06983v2 |
2017-11-16 | Superconductivity at 7.3 K in the 133-type Cr-based RbCr3As3 single crystals | Here we report the preparation and superconductivity of the 133-type Cr-based
quasi-one-dimensional (Q1D) RbCr3As3 single crystals. The samples were prepared
by the deintercalation of Rb+ ions from the 233-type Rb2Cr3As3 crystals which
were grown from a high-temperature solution growth method. The RbCr3As3
compound cry... | 1711.06133v1 |
2017-12-01 | Radiation damage and thermal shock response of carbon-fiber-reinforced materials to intense high-energy proton beams | A comprehensive study on the effects of energetic protons on carbon-fiber
composites and compounds under consideration for use as low-Z pion production
targets in future high-power accelerators and low-impedance collimating
elements for intercepting TeV-level protons at the Large Hadron Collider has
been undertaken add... | 1712.00509v1 |
2018-01-08 | Automated Instrumentation for the Determination of the High-Temperature Thermoelectric Figure-of-Merit | In this work, we report the fabrication of a high temperature measurement
setup to measure Figure of merit (ZT). This setup facilitates the simultaneous
measurement of Seebeck coefficient ({\alpha}), thermal conductivity (\kappa),
and electrical resistivity (\rho) required to calculate ZT. Measurement of
temperature, a... | 1801.02360v1 |
2018-01-30 | Structural and electronic phase transitions in FePS$_3$ under the application of pressure | Two-dimensional materials have proven to be a prolific breeding ground of new
and unstudied forms of magnetism and unusual metallic states, particularly when
tuned between their insulating and metallic phases. In this paper we present
work on a new metal to insulator transition system FePS$_3$ . This compound is
a two-... | 1801.10089v2 |
2018-03-14 | A 1.6:1 Bandwidth Two-Layer Antireflection Structure for Silicon Matched to the 190-310 GHz Atmospheric Window | Although high-resistivity, low-loss silicon is an excellent material for THz
transmission optics, its high refractive index necessitates antireflection
treatment. We fabricated a wide-bandwidth, two-layer antireflection treatment
by cutting subwavelength structures into the silicon surface using multi-depth
deep reacti... | 1803.05168v2 |
2018-04-26 | Large effective mass and interaction-enhanced Zeeman splitting of $K$-valley electrons in MoSe$_2$ | We study the magnetotransport of high-mobility electrons in monolayer and
bilayer MoSe$_2$, which show Shubnikov-de Haas (SdH) oscillations and quantum
Hall states in high magnetic fields. An electron effective mass of 0.8$m_e$ is
extracted from the SdH oscillations' temperature dependence; $m_e$ is the bare
electron m... | 1804.10104v2 |
2018-05-31 | Unusual magnetotransport in holmium monoantimonide | We report the magnetotransport properties of HoSb, a semimetal with
antiferromagnetic ground state. HoSb shows extremely large magnetoresistance
(XMR) and Shubnikov-de Haas (SdH) oscillation at low temperature and high
magnetic field. Different from previous reports in other rare earth
monopnictides, kinks in $\rho(B)$... | 1805.12496v1 |
2018-06-28 | Tribological Properties of Ultrananocrystalline Diamond Nanowire Thin Film: Influence of Sliding Ball Counterbodies | Ultrananocrystalline Diamond Nanowire (UNCD NW) thin film was deposited on
mirror polished silicon substrate (100) using Microwave Plasma Enhanced
Chemical Vapor Deposition (MPECVD) System with optimized deposition parameters
in CH4 (6%)/N2 plasma media. The film exhibited wire like morphology with
randomly oriented an... | 1806.10765v1 |
2018-09-13 | Anisotropic hybridization in a new Kondo lattice compound CeCoInGa$_3$ | We report a detailed and comparative study of the single crystal CeCoInGa$_3$
in both experiment and theory. Resistivity measurements reveal the typical
behavior of Kondo lattice with the onset temperature of coherence, $T^*\approx
50\,$K. The magnetic specific heat can be well fitted using a spin-fluctuation
model at ... | 1809.04735v1 |
2018-11-18 | In situ high-cycle fatigue reveals the importance of grain boundary structure in nanocrystalline Cu-Zr | Nanocrystalline metals typically have high fatigue strengths, but low
resistance to crack propagation. Amorphous intergranular films are disordered
grain boundary complexions that have been shown to delay crack nucleation and
slow crack propagation during monotonic loading by diffusing grain boundary
strain concentrati... | 1811.07263v1 |
2019-09-02 | Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature | The p-V-T equation of state of magnesium metal has been measured up to 20 GPa
and 1500 K using both multianvil and opposite anvil techniques combined with
synchrotron X-ray diffraction. To fit the experimental data, the model of
Anderson-Gr\"uneisen has been used with fixed parameter {\delta}T. The 300-K
bulk modulus o... | 1909.00645v1 |
2014-08-28 | Crossover of conduction mechanism in Sr2IrO4 epitaxial thin films | High quality epitaxial Sr2IrO4 thin films with various thicknesses (9-300 nm)
have been grown on SrTiO3 (001) substrates, and their electric transport
properties have been investigated. All samples showed the expected insulating
behavior with a strong resistivity dependence on film thickness, that can be as
large as th... | 1408.6798v1 |
2017-03-01 | Tunnel-injected sub-260 nm ultraviolet light emitting diodes | We report on tunnel-injected deep ultraviolet light emitting diodes (UV LEDs)
configured with a polarization engineered Al0.75Ga0.25N/ In0.2Ga0.8N tunnel
junction structure. Tunnel-injected UV LED structure enables n-type contacts
for both bottom and top contact layers. However, achieving Ohmic contact to
wide bandgap ... | 1703.00117v1 |
2019-02-27 | High-performance dendritic metamaterial absorber for broadband and near-meter wave radar | Absorbing materials in ultra-high frequency (UHF) band has constantly been a
major challenge. The size of the absorber in UHF band is large, whereas the
resonant frequency band is narrow. According to Rozanov's theory, two kinds of
composite metamaterial absorbers are designed to realize the requirements of
low-frequen... | 1902.10398v1 |
2019-07-29 | Mechanical Characterisation of the Protective Al$_2$O$_3$ Scale in Cr$_2$AlC MAX phases | MAX phases have great potential under demands of both high-temperature and
high-stress performance, with their mixed atomic bonding producing the
temperature and oxidation resistance of ceramics with the mechanical resilience
of metals. Here, we measure the mechanical properties up to 980C by
nanoindentation on highly ... | 1907.12341v1 |
2019-03-21 | Stabilization and heteroepitaxial growth of metastable tetragonal FeS thin films by pulsed laser deposition | Pulsed laser deposition, a non-equilibrium thin-film growth technique, was
used to stabilize metastable tetragonal iron sulfide (FeS), the bulk state of
which is known as a superconductor with a critical temperature of 4 K.
Comprehensive experiments revealed four important factors to stabilize
tetragonal FeS epitaxial ... | 1903.08820v1 |
2019-03-26 | Gate tunable quantum Hall effects in defect-suppressed Bi2Se3 films | Despite many years of efforts, attempts to reach the quantum regime of
topological surface states (TSS) on an electrically tunable topological
insulator (TI) platform have so far failed on binary TI compounds such as
Bi2Se3 due to high density of interfacial defects. Here, utilizing an optimal
buffer layer on a gatable... | 1903.10945v2 |
2019-04-09 | Alloy Design for Mechanical Properties: Conquering the Length Scales | Predicting the structural response of advanced multiphase alloys and
understanding the underlying microscopic mechanisms that are responsible for it
are two critically important roles modeling plays in alloy development. An
alloys demonstration of superior properties, such as high strength, creep
resistance, high ducti... | 1904.04569v1 |
2019-08-13 | Investigating the real-time dissolution of a compositionally complex alloy using inline ICP and correlation with XPS | The real-time dissolution of the single-phase compositionally complex alloy
(CCA), Al1.5TiVCr, was studied using an inline inductively coupled plasma
method. Compositionally complex alloys (CCAs), a term encompassing high entropy
alloys (HEAs) or multi-principal element alloys (MPEAs), are - in general -
noted for thei... | 1908.04493v1 |
2012-06-01 | Quantum Superinductor with Tunable Non-Linearity | We report on the realization of a superinductor, a dissipationless element
whose microwave impedance greatly exceeds the resistance quantum. The design of
the superinductor, implemented as a ladder of nanoscale Josephson junctions,
enables tuning of the inductance and its nonlinearity by a weak magnetic field.
The Rabi... | 1206.0307v2 |
2015-07-10 | Antibunched photons from inelastic Cooper-pair tunneling | We demonstrate theoretically that charge transport across a Josephson
junction, voltage-biased through a resistive environment, produces antibunched
photons. We develop a continuous-mode description of the emitted radiation
field in a semi-infinite transmission line terminated by the Josephson
junction. Within a pertur... | 1507.02885v1 |
2018-07-20 | High-Pressure Phase Diagram of NdFeAsO$_{0.9}$F$_{0.1}$: Disappearance of superconductivity on the verge of ferromagnetism from nd moments | We investigated transport and magnetic properties of NdFeAsO$_{0.9}$F$_{0.1}$
single crystal under hydrostatic pressures up to 50\,GPa. The ambient pressure
superconductivity at $T_{c} \sim$ 45.4\,K is fully suppressed at $P_{c} \sim$
21 GPa. Upon further increase of the pressure, the ferromagnetism associated
with the... | 1807.07729v1 |
2018-12-19 | Benchmarking vdW-DF first principle predictions against Coupled Electron-Ion Monte Carlo for high pressure liquid hydrogen | We report first principle results for nuclear structure and optical responses
of high pressure liquid hydrogen along two isotherms in the region of molecular
dissociation. We employ Density Functional Theory with the vdW-DF approximation
(vdW) and we benchmark the results against existing predictions from Coupling
Elec... | 1812.07818v1 |
2019-10-01 | In-situ detection of nucleation in high temperature solutions | The state of a sample during crystal growth from high temperature solutions
is not accessible in conventional furnace systems. An optimization of the
growth parameters often requires arduous trial and error procedures in
particular in case of novel multicomponent systems with unknown phase diagrams.
Here we present a m... | 1910.00316v1 |
2019-10-04 | Improvement of temperature uniformity of induction-heated T-shape susceptor for high-temperature MOVPE | The induction heating is a common method applied in metalorganic vapor phase
epitaxy (MOVPE) especially for higher-temperature growth conditions. However,
compared to the susceptor heated by the multiple-zone resistant heater, the
inductive-heated susceptor could suffer from severe thermal non-uniformity
issue. In this... | 1910.02024v1 |
2019-10-21 | Harnessing energy landscape exploration to control the buckling of cylindrical shells | The complexity and unpredictability of postbuckling responses in even simple
thin shells have raised great challenges to emerging technologies exploiting
buckling transitions. Here we comprehensively survey the buckling landscapes to
show the full complexity of the stable buckling states and the transition
mechanisms b... | 1910.09210v1 |
2019-11-07 | Long- to short-junction crossover and field-reentrant critical current in Al/Ag-nanowires/Al Josephson junctions | We have probed the superconducting proximity effect through long high-quality
monocrystalline Ag nanowires, by realizing Josephson junctions of different
lengths, with different superconducting materials. Thanks to the high number of
junctions probed, both the contact resistance and electron diffusion constant
could be... | 1911.02962v1 |
2019-11-13 | Giant enhancement of cryogenic thermopower by polar structural instability in the pressurized semimetal MoTe2 | We found that a high mobility semimetal 1T'-MoTe2 shows a significant
pressure-dependent change in the cryogenic thermopower in the vicinity of the
critical pressure, where the polar structural transition disappears. With the
application of a high pressure of 0.75 GPa, while the resistivity becomes as
low as 10 {\mu}{\... | 1911.05269v1 |
2019-11-26 | One-directional thermal transport in densely aligned single-wall carbon nanotube films | Individual carbon nanotubes (CNTs) possess extremely high thermal
conductivities. However, the thermal conductivities and their anisotropy of
macroscopic assemblies of CNTs have so far remained small. Here, we report
results of directional thermal transport measurements on a nearly-perfectly
aligned CNT film fabricated... | 1911.11340v1 |
2020-05-05 | Nanofilm Materials for Devices of Magnetic Field Measurement in Radiation Environment | The prospects of using nanofilms of indium-containing III-V semiconductors,
gold and single-layer graphene in magnetic field sensors, intended for
application in radiation environment were evaluated on the results of testing
in neutron fluxes. Semiconductor sensors are capable of withstanding radiation
levels typical f... | 2005.02075v1 |
2020-11-11 | Synthesis of high-entropy-alloy-type superconductors (Fe,Co,Ni,Rh,Ir)Zr2 with tunable transition temperature | We report on the synthesis and superconductivity of high-entropy-alloy-type
(HEA-type) compounds TrZr2 (Tr = Fe, Co, Ni, Rh, Ir), in which the Tr site
satisfies the criterion of HEA. Polycrystalline samples of HEA-type TrZr2 with
four different compositions at the Tr site were synthesized by arc melting
method. The pha... | 2011.05590v1 |
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