publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
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2017-02-24 | Elemental Analysis of Glass and Bakelite Electrodes Using PIXE Facility | The evolution of particle detectors dates back to the discovery of X-rays and
radioactivity in 1890s. In detector history, the Resistive Plate Chambers
(RPCs) are introduced in early 1980s. An RPC is a gaseous detector made up of
two parallel electrodes having high resistivity like that of glass and
bakelite. Currently... | 1702.08480v3 |
2014-08-12 | Collapse of CuO Double Chains and Suppression of Superconductivity in High-Pressure Phase of YBa$_2$Cu$_4$O$_8$ | The crystal structure and electrical resistivity of YBa$_2$Cu$_4$O$_8$ (Y124)
were studied under high pressure up to 18 GPa using diamond-anvil cells,
respectively, in order to clarify its conduction mechanism. Y124 causes the
first-order phase-transition into the orthorhombic Immm at pressure around 11
GPa. The high-p... | 1408.2613v1 |
2019-02-11 | Improved oxidation resistance of high emissivity coatings on fibrous ceramic for reusable space system | To develop high emissivity coatings on fibrous ceramic substrates with
improved thermal resistance for reusable space systems,
WSi2-MoSi2-Si-SiB6-borosilicate glass coatings were prepared on fibrous ZrO2 by
slurry dipping and subsequent high temperature rapid sintering. A coating with
50 wt% WSi2 and 50 wt% MoSi2 prese... | 1902.03943v2 |
2018-08-16 | Investigating Unipolar Switching in Niobium Oxide Resistive Switches: Correlating Quantized Conductance and Mechanism | Memory devices based on resistive switching (RS) have not been fully realised
due to lack of understanding of the underlying switching mechanisms. Nature of
ion transport responsible for switching and growth of conducting filament in
transition metal oxide based RS devices is still in debate. Here, we
investigated the ... | 1808.05600v1 |
2019-12-19 | A high-throughput structural and electrochemical study of metallic glass formation in Ni-Ti-Al | Based on a set of machine learning predictions of glass formation in the
Ni-Ti-Al system, we have undertaken a high-throughput experimental study of
that system. We utilized rapid synthesis followed by high-throughput structural
and electrochemical characterization. Using this dual-modality approach, we are
able to bet... | 1912.09330v1 |
2011-04-22 | High purity semi-insulating 4H-SiC epitaxial layers by Defect-Competition Epitaxy | Thick, high-purity semi-insulating (SI)homoepitaxial layers on Si-face 4H-SiC
weregrownsystematically, with resistivity \geq 109{\Omega}-cmby maintaining
high C/Si ratios 1.3-15 during growth.Comparison of secondary ion mass spectra
betweenlow-dopedepilayers grown at C/Si ratio<1.3andSI-epilayers grown at C/Si
ratio>1.... | 1104.4509v1 |
2020-05-22 | Sharp negative differential resistance from vibrational mode softening in molecular junctions | We unravel the critical role of vibrational mode softening in single-molecule
electronic devices at high bias. Our theoretical analysis is carried out with a
minimal model for molecular junctions, with mode softening arising due to
quadratic electron-vibration couplings, and by developing a mean-field
approach. We disc... | 2005.11365v1 |
2023-02-28 | ZrNb(CO) RF superconducting thin film with high critical temperature in the theoretical limit | Superconducting radio-frequency (SRF) resonators are critical components for
particle accelerator applications, such as free-electron lasers, and for
emerging technologies in quantum computing. Developing advanced materials and
their deposition processes to produce RF superconductors that yield nanoohms
surface resista... | 2302.14410v2 |
2020-01-07 | First principles evaluation of fcc ruthenium for use in advanced interconnects | As the semiconductor industry turns to alternate conductors to replace Cu for
future interconnect nodes, much attention as been focused on evaluating the
electrical performance of Ru. The typical hexagonal close-packed (hcp) phase
has been extensively studied, but relatively little attention has been paid to
the face-c... | 2001.02216v3 |
2021-12-12 | Electric-field-driven resistive transition in multiferroic SrCo$_2$Fe$_{16}$O$_{27}$/Sr$_3$Co$_2$Fe$_{24}$O$_{41}$composite | We report observation of electric-field-driven resistive transition at a
characteristic threshold field $E_{th}(T)$ across a temperature range 10-200 K
in an off-stoichiometric composite of (~80 vol%) W- and (~20 vol%) Z-type
hexaferrites. The dielectric constant $\epsilon$ and the relaxation time
constant $\tau$ too e... | 2112.06246v1 |
2023-02-20 | Observation of near room temperature thin film superconductivity of atmospherically stable Ag-Au mesoscopic thin film | An environmentally stable mesoscopic thin film of Au of certain thickness has
been deposited thermally on top of a Ag+ implanted oxide substrate to develop a
close to room temperature superconductor. This thin film has been deposited in
two different stages. Initially, a sol-gel derived ion conducting metal oxide
(ICMO... | 2302.09974v3 |
2023-10-11 | Absence of topological Hall effect in Fe$_x$Rh$_{100-x}$ epitaxial films: revisiting their phase diagram | A series of Fe$_x$Rh$_{100-x}$ ($30 \leq x \leq 57$) films were epitaxially
grown using magnetron sputtering, and were systematically studied by
magnetization-, electrical resistivity-, and Hall resistivity measurements.
After optimizing the growth conditions, phase-pure Fe$_{x}$Rh$_{100-x}$ films
were obtained, and th... | 2310.07140v1 |
2022-06-22 | Thermoelectric properties of high-entropy rare-earth cobaltates | High-entropy concept introduced with a promising paradigm to obtain exotic
physical properties has motivated us to explore the thermoelectric properties
of Sr-substituted high-entropy rare-earth cobaltates i.e.,
(LaNdPrSmEu)$_{1-x}$Sr$_x$CoO3 (0 \leq x \leq 0.10). The structural analysis of
the samples synthesized usin... | 2206.11106v1 |
2005-12-15 | The WHO surveillance threshold and the emergence of drug-resistant HIV strains in Botswana | Background: Approximately 40% of adults in Botswana are HIV-infected. The
Botswana antiretroviral program began in 2002 and currently treats 34,000
patients with a goal of treating 85,000 patients (~30% of HIV-infected adults)
by 2009. We predict the evolution of drug-resistant strains of HIV that may
emerge as a conse... | 0512032v1 |
2020-04-10 | Strain-engineering the Schottky barrier and electrical transport on MoS2 | Strain provides an effective means to tune the electrical properties while
retaining the native chemical composition of the material. Unlike
three-dimensional solids, two-dimensional materials withstand higher levels of
elastic strain making it easier to tune various electrical properties to suit
the technology needs. ... | 2004.05061v1 |
2011-08-25 | Synthesis, Crystal Growth and Epitaxial Layer Deposition of FeSe0.88 Superconductor and Other Poison Materials by Use of High Gas Pressure Trap System | The FeSe samples in the form of polycrystals, single crystals and thin films
have been prepared and characterized. The synthesized material has been hot
isostatically pressed under pressure of 0.45 GPa of 5N purity argon with the
use of the high gas pressure trap system (HGPTS). Thin films have been
fabricated by the m... | 1108.5069v1 |
2021-07-19 | Making high-quality quantum microwave devices with van der Waals superconductors | Ultra low-loss microwave materials are crucial for enhancing quantum
coherence and scalability of superconducting qubits. Van der Waals (vdW)
heterostructure is an attractive platform for quantum devices due to the
single-crystal structure of the constituent two-dimensional (2D) layered
materials and the lack of dangli... | 2107.09147v3 |
2021-10-21 | Phonon anharmonicity: a pertinent review of recent progress and perspective | Anharmonic lattice vibrations govern the thermal dynamics in materials and
present how the atoms interact and how they conduct heat. An indepth
understanding of the microscopic mechanism of phonon anharmonicity in condensed
systems is critical for developing better functional and energy materials. In
recent years, a va... | 2110.11094v1 |
2023-01-16 | Nonlinear transport in a photo-induced superconductor | Optically driven quantum materials exhibit a variety of non-equilibrium
functional phenomena [1-11], which are potentially associated with unique
transport properties. However, these transient electrical responses have
remained largely unexplored, primarily because of the challenges associated
with integrating quantum ... | 2301.06425v1 |
2015-09-03 | On the Concept of Cryptographic Quantum Hashing | In the paper we define a notion of quantum resistant
($(\epsilon,\delta)$-resistant) hash function which combine together a notion
of pre-image (one-way) resistance ($\epsilon$-resistance) property we define in
the paper and the notion of collision resistance ($\delta$-resistance)
properties.
We show that in the quan... | 1509.01268v2 |
2019-12-11 | Observation of excess resistance anomaly at resistive transitions in Ag/Au nanostructures | The resistive transition in nanocomposite films of silver (Ag) nanoclusters
of ~ 1 nm diameter embedded in gold (Au) matrix exhibits an anomalous
resistance peak at the onset of the transition, even for transition
temperatures as high as 260 K. The maximum value of the resistance ranges
between ~ 30% - 300% above that ... | 1912.05428v1 |
2020-08-13 | Properties of materials considered for improvised masks | During a pandemic in which aerosol and droplet transmission is possible, the
demand for masks that meet medical or workplace standards can prevent most
individuals or organizations from obtaining suitable protection. Cloth masks
are widely believed to impede droplet and aerosol transmission but most are
constructed fro... | 2008.06001v1 |
2022-06-01 | A Pseudo-Two-Dimensional (P2D) Model for FeS2 Conversion Cathode Batteries | Conversion cathode materials are gaining interest for secondary batteries due
to their high theoretical energy and power density. However, practical
application as a secondary battery material is currently limited by practical
issues such as poor cyclability. To better understand these materials, we have
developed a ps... | 2206.00647v2 |
2024-03-12 | Physics-Transfer Learning for Material Strength Screening | The strength of materials, like many problems in the natural sciences, spans
multiple length and time scales, and the solution has to balance accuracy and
performance. Peierls stress is one of the central concepts in crystal
plasticity that measures the strength through the resistance of a dislocation
to plastic flow. ... | 2403.07526v1 |
2016-06-25 | Observation of Optical and Electrical In-plane Anisotropy in High-mobility Few-layer ZrTe5 | Transition metal pentatelluride ZrTe5 is a versatile material in
condensed-matter physics and has been intensively studied since the 1980s. The
most fascinating feature of ZrTe5 is that it is a 3D Dirac semimetal which has
linear energy dispersion in all three dimensions in momentum space.
Structure-wise, ZrTe5 is a la... | 1606.07960v2 |
2018-09-25 | Intrinsic Insulating Ground State in Transition Metal Dichalcogenide TiSe2 | The transition metal dichalcogenide TiSe$_2$ has received significant
research attention over the past four decades. Different studies have presented
ways to suppress the 200~K charge density wave transition, vary low temperature
resistivity by several orders of magnitude, and stabilize magnetism or
superconductivity. ... | 1809.09467v2 |
2018-08-24 | Data-driven Exploration of New Pressure-induced Superconductivity in PbBi$_2$Te$_4$ with Two Transition Temperatures | Candidates compounds for new thermoelectric and superconducting materials,
which have narrow band gap and flat bands near band edges, were exhaustively
searched by the high-throughput first-principles calculation from an inorganic
materials database named AtomWork. We focused on PbBi$_2$Te$_4$ which has the
similar ele... | 1808.07973v1 |
2021-03-17 | Multi-level resistance switching and random telegraph noise analysis of nitride based memristors | Resistance switching devices are of special importance because of their
application in resistive memories (RRAM) which are promising candidates for
replacing current nonvolatile memories and realize storage class memories.
These devices exhibit usually memristive properties with many discrete
resistance levels and impl... | 2103.09931v1 |
2021-10-28 | Spread and erase -- How electron hydrodynamics can eliminate the Landauer-Sharvin resistance | It has long been realized that even a perfectly clean electronic system
harbors a Landauer-Sharvin resistance, inversely proportional to the number of
its conduction channels. This resistance is usually associated with voltage
drops on the system's contacts to an external circuit. Recent theories have
shown that hydrod... | 2110.15369v2 |
2005-08-04 | Subharmonic gap structures and Josephson effect in MgB2/Nb micro-constrictions | Superconducting micro-constrictions between Nb tips and high quality
MgB$_{2}$ pellets have been realized by means of a point-contact inset, driven
by a micrometric screw. Measurements of the current-voltage characteristics and
of the dynamical conductance versus bias have been performed in the temperature
range betwee... | 0508137v2 |
2007-02-02 | Dependence of electronic structure of SrRuO3 and the degree of correlation on cation off-stoichiometry | We have grown and studied high quality SrRuO3 films grown by MBE as well as
PLD. By changing the oxygen activity during deposition we were able to make
SrRuO3 samples that were stoichiometric (low oxygen activity) or with ruthenium
vacancies (high oxygen activity). Samples with strontium vacancies were found
impossible... | 0702050v1 |
2007-11-17 | Development of New Hole-Type Avalanche Detectors and the First Results of their Applications | We have developed a new detector of photons and charged particles- a
hole-type structure with electrodes made of a double layered resistive
material: a thin low resistive layer coated with a layer having a much higher
resistivity. One of the unique features of this detector is its capability to
operate at high gas gain... | 0711.2747v1 |
2010-10-29 | Analytical method for parameterizing the random profile components of nanosurfaces imaged by atomic force microscopy | The functional properties of many technological surfaces in biotechnology,
electronics, and mechanical engineering depend to a large degree on the
individual features of their nanoscale surface texture, which in turn are a
function of the surface manufacturing process. Among these features, the
surface irregularities a... | 1010.6232v1 |
2013-04-04 | Non-contact method for measurement of the microwave conductivity of graphene | We report a non-contact method for conductivity and sheet resistance
measurements of graphene samples using a high Q microwave dielectric resonator
perturbation technique, with the aim of fast and accurate measurement of
microwave conductivity and sheet resistance of monolayer and few layers
graphene samples. The dynam... | 1304.1304v1 |
2016-02-03 | Robust tunability of magnetorestance in Half-Heusler RPtBi (R = Gd, Dy, Tm, and Lu) compounds | We present the magnetic field dependencies of transport properties for
$R$PtBi ($R$ = Gd, Dy, Tm, and Lu) half-Heusler compounds. Temperature and
field dependent resistivity measurements of high quality $R$PtBi single
crystals reveal an unusually large, non-saturating magnetoresistance (MR) up to
300 K under a moderate... | 1602.01194v1 |
2018-06-07 | A Timing RPC with low resistive ceramic electrodes | For precise start time determination a Beam Fragmentation T$_0$ Counter
(BFTC) is under development for the Time-of-Flight Wall of the Compressed
Baryonic Matter Spectrometer (CBM) at the Facility for Antiproton and Ion
Research (FAIR) at Darmstadt/Germany. This detector will be located around the
beam pipe, covering t... | 1806.02629v2 |
2019-05-07 | Single-parameter scaling in the magnetoresistance of optimally doped La$_{2-x}$Sr$_{x}$CuO$_4$ | We show that the recent magnetoresistance data on thin-film
La$_{2-x}$Sr$_{x}$CuO$_4$ (LSCO) in strong magnetic fields ($B$) obeys a
single-parameter scaling of the form MR$(B,T)=f(\mu_H(T)B)$, where
$\mu_H^{-1}(T)\sim T^{\alpha}$ ($1\le\alpha\le2$), from $T=180$K until
$T\sim20$K, at which point the single-parameter s... | 1905.02737v1 |
2021-01-18 | Intrinsic hysteresis in the presumed superconducting transition of hydrides under high pressure | Superconducting transitions in the absence of magnetic field should be
non-hysteretic. Here we address the fact that the drops in electrical
resistance that have been interpreted as evidence of superconductivity in
several hydrides under high pressure (so-called "superhydrides") show
hysteresis. We argue that the exper... | 2101.07208v4 |
2021-03-27 | Tesla's fluidic diode and the electronic-hydraulic analogy | Reasoning by analogy is powerful in physics for students and researchers
alike, a case in point being electronics and hydraulics as analogous studies of
electric currents and fluid flows. Around 100 years ago, Nikola Tesla proposed
a flow control device intended to operate similarly to an electronic diode,
allowing flu... | 2103.14813v1 |
2021-08-19 | Measurement of the Low-temperature Loss Tangent of High-resistivity Silicon with a High Q-factor Superconducting Resonator | In this letter, we present the direct loss tangent measurement of a
high-resistivity intrinsic (100) silicon wafer in the temperature range from ~
70 mK to 1 K, approaching the quantum regime. The measurement was performed
using a technique that takes advantage of a high quality factor superconducting
niobium resonator... | 2108.08894v5 |
2007-06-01 | High-Tc superconductivity originated from strong spin-charge correlation: indication from linear temperature dependence of resistivity | Both the highest- and the linear temperature dependence of the resistivity in
wide temperature range appear at the optimally doped regions of Cu-based
superconductors1,2,3,4,5, and the highest- of Fe-based superconductors6,7 are
also associated with the linear temperature dependence of the resistivity in
normal states ... | 0706.0059v2 |
2023-08-30 | Investigation of W-SiC compositionally graded films as a divertor material | W-SiC composite material is a promising plasma-facing material candidate
alternative to pure W due to the low neutron activation, low impurity
radiation, and low tritium diffusivity of SiC while leveraging the high erosion
resistance of the W armor. Additionally, W and SiC have high thermomechanical
compatibility given... | 2308.16358v2 |
1999-09-28 | Magnetotransport properties of (Ga,Mn)As investigated at low temperature and high magnetic field | Magnetotransport properties of ferromagnetic semiconductor (Ga,Mn)As have
been investigated. Measurements at low temperature (50 mK) and high magnetic
field (<= 27 T) have been employed in order to determine the hole concentration
p = 3.5x10^20 cm ^-3 of a metallic (Ga0.947Mn0.053)As layer. The analysis of
the temperat... | 9909393v1 |
2003-09-28 | Electron-Phonon Scattering in Metallic Single-Walled Carbon Nanotubes | Electron scattering rates in metallic single-walled carbon nanotubes are
studied using an atomic force microscope as an electrical probe. From the
scaling of the resistance of the same nanotube with length in the low and high
bias regimes, the mean free paths for both regimes are inferred. The observed
scattering rates... | 0309641v1 |
1998-10-26 | High frequency magneto-impedance of double perovskite $La_{1.2}Sr_{1.8}Mn_{2}O_{7}$: secondary transitions at high temperatures | Radio frequency magneto-impedance measurements clearly reveal a pronounced
anomaly at 260K besides the main MI transition at 125K in the double perovskite
material $La_{1.2}Sr_{1.8}Mn_{2}O_{7}$. This feature is not seen clearly in
static resistivity and magnetization measurements. We suggest that this anomaly
represent... | 9810351v2 |
1999-04-29 | Consilience of High-Tc Theories | Improvements both in the quality and in the variety of experiments on
high-temperature superconductors have yielded new insights into the microscopic
origins of pairing. A number of competing theories have already been ruled out.
Some of the more promising descriptions -- gauge theories, coupled-chains,
nesting instabi... | 9904437v1 |
1999-09-03 | A thermostable trilayer resist for niobium lift-off | We have developped a novel lift-off process for fabrication of high quality
superconducting submicron niobium structures. The process makes use of a
thermostable polymer with a high transition temperature T_{g}= 235 C and an
excellent chemical stability. The superconducting critical temperature of 100
nm wide niobium l... | 9909053v1 |
2003-10-29 | Ultrasonic Defect Modification in Irradiated Silicon | It is shown for the first time, that room temperature Ultrasonic Defect
Manipulation (UDM) can significantly reduce the concentration of radiation
defects in high resistivity silicon. Secondary Ion Mass Spectroscopy revealed
that oxygen- and hydrogen- related chemical reactions in silicon are likely to
occur under UDM ... | 0310675v1 |
2004-08-24 | Barrier layer formation and PTCR effect in (1-x) Pb(Fe1/2Nb1/2)O3]-xPbTiO3 (x = 0.13) ceramics | (1-x)Pb(Fe1/2Nb1/2)O3-PbTiO3(PFN-xPT)Ceramics with x = 0.13 sintered at 1473K
show diffuse phase transition and very high dielectric constant at lower
frequencies.The high value of dielectric constant at lower frequencies is shown
to be due to the barrier layer formation.The resistivity of the PFN-xPT
ceramics, obtaine... | 0408509v1 |
2005-02-06 | Model for a Macroscopically Disordered Conductor with an Exactly Linear High-Field Magnetoresistance | We calculate the effective resistivity of a macroscopically disordered two
dimensional conductor consisting of two components in a perpendicular magnetic
field. When two components have equal area fractions, we use a duality theorem
to show that the magnetoresistance is non-saturating and at high fields varies
exactly ... | 0502162v2 |
2007-07-28 | Performances of a Newly High Sensitive Trilayer F/Cu/F GMI Sensor | We have selected stress-annealed nanocrystalline Fe-based ribbons for
ferromagnetic/copper/ferromagnetic sensors exhibiting high magneto-impedance
ratio. Longitudinal magneto-impedance reaches 400% at 60 kHz and longitudinal
magneto-resistance increases up to 1300% around 200 kHz. | 0707.4232v2 |
2009-09-25 | Spin Injection Enhancement Through Schottky Barrier Superlattice Design | We predict it is possible to achieve high-efficiency room-temperature spin
injection from a mag- netic metal into InAs-based semiconductors using an
engineered Schottky barrier based on an InAs/AlSb superlattice. The Schottky
barrier with most metals is negative for InAs and positive for AlSb. For such
metals there exi... | 0909.4594v1 |
2009-11-29 | Current driven discontinuous insulator-metal transition and colossal low-field magnetoresistance in Sm0.6Sr0.4MnO3 | It is shown that with increasing magnitude of current (I), resistivity of
Sm0.6Sr0.4MnO3 transforms from a smooth to a discontinuous insulator-metal
transition which is also accompanied by an abrupt decrease in temperature of
the sample. We report colossal low-field magnetoresistance under a high current
bias (-99% at ... | 0911.5491v1 |
2010-03-26 | Superconductor terahertz metamaterial | We characterize the behaviour of split ring resonators made up of
high-transition temperature YBCO superconductor using terahertz time domain
spectroscopy. The superconductor metamaterial shows sharp change in the
transmission spectrum at the fundamental inductive-capacitive resonance and the
dipole resonance as the te... | 1003.5169v1 |
2013-08-15 | Low Temperature Nanoscale Electronic Transport on the MoS_2 surface | Two-probe electronic transport measurements on a Molybdenum Disulphide
(MoS_2) surface were performed at low temperature (30K) under ultra-high vacuum
conditions. Two scanning tunneling microscope tips were precisely positioned in
tunneling contact to measure the surface current-voltage characteristics. The
separation ... | 1308.3299v1 |
2014-02-27 | Nonlinear conductivity in CaRuO3 thin films measured by short current pulses | Metals near quantum critical points have been predicted to display universal
out-of equilibrium behavior in the steady current-carrying state. We have
studied the non-linear conductivity of high-quality CaRuO$_3$ thin films with
residual resistivity ratio up to 57 using micro-second short, high-field
current pulses at ... | 1402.6845v1 |
2015-02-02 | Electrical and magnetic properties of La$_{0.5}$Rh$_4$Sb$_{12}$ filled skutterudite synthesized at high pressure | A filled skutterudite, La$_{0.5}$Rh$_4$Sb$_{12}$, with a lattice constant of
9.284(2) {\AA} was synthesized using a high-pressure technique. The electrical
resistivity showed semiconducting behavior and the energy gap was estimated to
be more than 0.08 eV. Magnetic susceptibility measurements indicated
temperature-inde... | 1502.00337v2 |
2016-01-12 | Melting of B12P2 boron subphosphide under pressure | Melting of boron subphosphide (B12P2) to 26 GPa has been studied by in situ
synchrotron X-ray powder diffraction in a laser-heated diamond anvil cell, and
by quenching and electrical resistance measurements in a toroid-type
high-pressure apparatus. B12P2 melts congruently, and the melting curve has a
positive slope of ... | 1601.02930v1 |
2016-02-23 | Preparation of Silver and Silver-backing self-supported thin targets by high vacuum evaporation | We have produced in the Nuclear Physics Center in Lisbon thin film
self-supported targets of Ag, LiF/Ag and CaF$_2$/Ag by a high vacuum resistance
evaporation method. The production setup, materials, methods, characterization
and results are described. | 1602.07172v2 |
2016-05-09 | Highly Non-linear and Reliable Amorphous Silicon Based Back-to-Back Schottky Diode as Selector Device for Large Scale RRAM Arrays | In this work we present silicon process compatible, stable and reliable
($>10^{8}$cycles), high non-linearity ratio at half-read voltage ($>5\times
10^{5}$), high speed ($<60ns$) low operating voltage ($<2V$) back-to-back
Schottky diodes. Materials choice of electrode, thickness of semiconductor
layer and doping level ... | 1605.02757v1 |
2016-07-19 | Performance Enhancement of Black Phosphorus Field-Effect Transistors by Chemical Doping | In this letter, a new approach to chemically dope black phosphorus (BP) is
presented, which significantly enhances the device performance of BP
field-effect transistors for an initial period of 18 h, before degrading to
previously reported levels. By applying
2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCN... | 1607.05760v1 |
2018-04-04 | Ultra-high Vacuum Deposition of Higher Manganese Silicide Mn4Si7 Thin Films | We have successfully grown one of the higher manganese silicides, Mn4Si7 thin
films on silicon (100) substrates using an ultra-high vacuum deposition with a
base pressure of 1x10-9 torr. The thickness of the film was varied from 65-100
nm. These films exhibit a tetragonal crystal structure and display paramagnetic
beha... | 1804.01604v1 |
2018-04-09 | Superconductivity in REO0.5F0.5BiS2 with high-entropy-alloy-type blocking layers | We synthesized new REO0.5F0.5BiS2 (RE: rare earth) superconductors with the
high-entropy-alloy-type (HEA-type) REO blocking layers. According to the RE
concentration and the RE ionic radius, the lattice constant of a systematically
changed in the HEA-type samples. A sharp superconducting transition was
observed in the ... | 1804.02880v2 |
2020-09-01 | Solute softening and vacancy generation by diffusion-less climb in magnesium alloys | Active room temperature diffusion-less climb of the <a> edge dislocations in
model Mg-Al alloys was observed using molecular dynamics simulations.
Dislocations on prismatic and pyramidal I planes climb through the basal plane
to overcome solute obstacles. This out-of-plane dislocation motion softens the
high resistance... | 2009.00656v1 |
2020-06-20 | Can an amorphous crystallize into a high entropy alloy? | On the premise that amorphous-HEA composites could demonstrate high toughness
and resistance to embrittlement akin to the phase separating glassy-solid
solution composites, we develop a thermodynamics based approach to identify
chemical compositions capable of undergoing the amorphous to HEA
transformation. We introduc... | 2006.11579v1 |
2015-03-20 | Bottom-up assembly of metallic germanium | Extending chip performance beyond current limits of miniaturisation requires
new materials and functionalities that integrate well with the silicon
platform. Germanium fits these requirements and has been proposed as a
high-mobility channel material,[1] a light emitting medium in
silicon-integrated lasers,[2,3] and a p... | 1503.05994v1 |
2014-08-06 | Permanent magnet with MgB2 bulk superconductor | Superconductors with persistent zero-resistance currents serve as permanent
magnets for high-field applications requiring a strong and stable magnetic
field, such as magnetic resonance imaging (MRI). The recent global helium
shortage has quickened research into high-temperature superconductors (HTSs)
materials that can... | 1408.1277v1 |
2014-08-20 | In-situ hydrogen charging of zirconium powder to study isothermal percipitation of hydrides and determination of Zr-hydride crystal structure | Zirconium alloys are widely used in the nuclear industry because of their
high strength, good corrosion resistance and low neutron absorption
cross-section. However, zirconium has strong affinity for hydrogen which leads
to hydrogen concentration build-up over time. It is well known that the
formation of hydrides will ... | 1408.4665v1 |
2022-12-02 | Ablation threshold and temperature dependent thermal conductivity of high entropy carbide thin films | High entropy carbides (HECs) are a promising new class of ultra-high
temperature ceramics that could provide novel material solutions for leading
edges of hypersonic vehicles, which can reach temperatures above 3500C and
experience extreme thermal gradients. Although the mechanical and thermal
properties of HECs have b... | 2212.01238v1 |
2023-10-18 | A New Class of Materials Based on Nanoporous High Entropy Alloys with Outstanding Properties | Nanoporous metals with a random, bicontinuous structure of both pores and
ligaments exhibit many unique mechanical properties, but their technical
applications are often limited by their intrinsic brittleness under tensile
strain triggered by fracture of the weakest ligaments. Here, we use molecular
dynamics simulation... | 2310.11937v1 |
1996-09-20 | High Temperature Thermopower in La_{2/3}Ca_{1/3}MnO_3 Films: Evidence for Polaronic Transport | Thermoelectric power, electrical resistivity and magnetization experiments,
performed in the paramagnetic phase of La_{2/3}Ca_{1/3}MnO_3, provide evidence
for polaron-dominated conduction in CMR materials. At high temperatures, a
large, nearly field-independent difference between the activation energies for
resistivity... | 9609212v1 |
2000-01-25 | Influence of high-energy electron irradiation on the transport properties of La_{1-x}Ca_{x}MnO_{3} films (x \approx 1/3) | The effect of crystal lattice disorder on the conductivity and colossal
magnetoresistance in La_{1-x}Ca_{x}MnO_{3} (x \approx 0.33) films has been
examined. The lattice defects are introduced by irradiating the film with
high-energy (\simeq 6 MeV) electrons with a maximal fluence of about 2\times
10^{17} cm^{-2}. This ... | 0001372v1 |
2001-07-27 | Lattice coupled first order magnetoresistance transition in an A-type antiferromagnet: Pr$_{0.46}$Sr$_{0.54}$MnO$_3$ | We investigated magnetic, magnetotransport and magnetostriction properties of
the A-type antiferromagnet Pr$_{0.46}$Sr$_{0.54}$MnO$_3$ which undergoes a
first order paramagnetic-antiferromagnetic transition below T$_N$ = 210 K while
cooling and T$_N$ = 215 K while warming. The zero field ($\mu_0$H = 0 T)
resistivity sh... | 0107560v1 |
2001-09-04 | Magnetotransport in a bi-crystal film of La_0.7Sr_0.3MnO_3 | Transport properties of an epitaxial film of La_0.7Sr_0.3MnO_3 (LSMO),
deposited epitaxially on a LaAlO_3 bi-crystal substrate having a misorientation
angle of 9.2 deg., have been studied.
The film was patterned into a meander containing 100 grain boundaries. The
resistivity of the sample exhibits two components; one... | 0109052v1 |
2002-08-20 | Fabrication and properties of gallium metallic photonic crystals | Gallium metallic photonic crystals with 100% filling factor have been
fabricated via infiltration of liquid gallium into opals of 300-nm silica
spheres using a novel high pressure-high temperature technique. The electrical
resistance of the Ga-opal crystals was measured at temperatures from 10 to 280
K. The data obtain... | 0208392v1 |
2002-09-24 | High Curie temperature GaMnAs obtained by resistance-monitored annealing | We show that by annealing Ga1-xMnxAs thin films at temperatures significantly
lower than in previous studies, and monitoring the resistivity during growth,
an unprecedented high Curie temperature Tc and conductivity can be obtained. Tc
is unambiguously determined to be 118 K for Mn concentration x=0.05, 140 K for
x=0.0... | 0209554v1 |
2003-10-09 | RF Surface Resistance of a HIPped MgB2 Sample at 21 GHz | Magnesium diboride (MgB2) is attractive for RF cavity application for
particle accelerators because it might not show an increase of RF surface
losses at high magnetic surface fields, a phenomenon that has prevented high-Tc
superconducting materials such as YBCO from being used for this application. We
have measured th... | 0310213v1 |
2004-08-31 | Normal state properties of high angle grain boundaries in (Y,Ca)Ba2Cu3O7-delta | By lithographically fabricating an optimised Wheatstone bridge geometry, we
have been able to make accurate measurements of the resistance of grain
boundaries in Y1-xCaxBa2Cu3O7-d between the superconducting transition
temperature, Tc, and room temperature. Below Tc the normal state properties
were assessed by applying... | 0409004v1 |
2005-07-06 | Oxidation Resistant Germanium Nanowires: Bulk Synthesis, Long Chain Alkanethiol Functionalization and Langmuir-Blodgett Assembly | A simple method is developed to synthesize gram quantities of uniform Ge
nanowires (GeNWs) by chemical vapor deposition on preformed, monodispersed
seed-particles loaded onto high surface area silica support. Various chemical
functionalization schemes are investigated to passivate the GeNW surfaces using
alkanethiols a... | 0507145v2 |
2006-03-08 | Nanoscopic processes of Current Induced Switching in thin tunnel junctions | In magnetic nanostructures one usually uses a magnetic field to commute
between two resistance (R) states. A less common but technologically more
interesting alternative to achieve R-switching is to use an electrical current,
preferably of low intensity. Such Current Induced Switching (CIS) was recently
observed in thi... | 0603208v1 |
2007-04-13 | Counting and manipulating single electrons using a carbon nanotube transistor | We report on the electric measurements of an individual Au nanoparticle with
an ultra-high contact resistance of about $10^{19} \Omega$. The high-impedance
measurements have been carried out by counting the electrons that are
transferred onto the particle. In order to do this, a carbon nanotube is used
as the electrode... | 0704.1794v1 |
2007-07-17 | Positive and negative pressure effects on the magnetic ordering and the Kondo effect in the compound Ce2RhSi3 | The competition between magnetic ordering and the Kondo effect in Ce2RhSi3,
ordering antiferromagnetically at 7 K, is investigated by the measurements of
magnetization, heat capacity and electrical resistivity on the solid solutions,
Ce(2-x)La(x)RhSi3, Ce(2-y)Y(y)RhSi3, and Ce2RhSi(3-z)Ge(z), as well as by high
pressur... | 0707.2518v1 |
2007-09-05 | Thickness-dependence of the electronic properties in V2O3 thin films | High quality vanadium sesquioxide V2O3 films (170-1100 {\AA}) were grown
using the pulsed laser deposition technique on (0001)-oriented sapphire
substrates, and the effects of film thickness on the lattice strain and
electronic properties were examined. X-ray diffraction indicates that there is
an in-plane compressive ... | 0709.0692v1 |
2008-06-09 | Superconductivity in single crystals of LaFePO | Single crystals of the compound LaFePO were prepared using a flux growth
technique at high temperatures. Electrical resistivity measurements reveal
metallic behavior and a resistive transition to the superconducting state at a
critical temperature T_c ~ 6.6 K. Magnetization measurements also show the
onset of supercond... | 0806.1265v2 |
2009-08-23 | Superconductivity at high Tc in neodymium-doped 1111-SrFeAsF system | Polycrystalline Sr1-xNdxFeAsF samples were prepared at various Nd-doping
levels using both a stoichiometric mixture of the starting materials and in
slight excess amounts of FeAs. Susceptibility and resistivity of the samples
were studied down to 4 K revealing a probable coexistence of superconductivity
and a magnetic ... | 0908.3285v3 |
2011-06-29 | Hysteretic magnetoresistance and thermal bistability in a magnetic two-dimensional hole system | Colossal negative magnetoresistance and the associated field-induced
insulator-to-metal transition, the most characteristic features of magnetic
semiconductors, are observed in n-type rare earth oxides and chalcogenides,
p-type manganites, n-type and p-type diluted magnetic semiconductors (DMS) as
well as in quantum we... | 1106.5832v1 |
2011-09-06 | Evolution of transport properties of BaFe2-xRuxAs2 in a wide range of isovalent Ru substitution | The effects of isovalent Ru substitution at the Fe sites of BaFe2-xRuxAs2 are
investigated by measuring resistivity and Hall coefficient on high-quality
single crystals in a wide range of doping (0 < x < 1.4). Ru substitution
weakens the antiferromagnetic (AFM) order, inducing superconductivity for
relatively high dopi... | 1109.1083v1 |
2012-09-06 | High-temperature thermoelectric properties of the double-perovskite ruthenium oxide (Sr$_{1-x}$La$_x$)$_2$ErRuO$_6$ | We have prepared polycrystalline samples of (Sr$_{1-x}$La$_x$)$_2$ErRuO$_6$
and (Sr$_{1-x}$La$_x$)$_2$YRuO$_6$, and have measured the resistivity, Seebeck
coefficient, thermal conductivity, susceptibility and x-ray absorption in order
to evaluate the electronic states and thermoelectric properties of the doped
double-p... | 1209.1250v1 |
2012-10-12 | Simultaneous measurement of pressure evolution of crystal structure and superconductivity in FeSe0.92 using designer diamonds | Simultaneous high pressure x-ray diffraction and electrical resistance
measurements have been carried out on a PbO type {\alpha}-FeSe0.92 compound to
a pressure of 44 GPa and temperatures down to 4 K using designer diamond anvils
at synchrotron source. At ambient temperature, a structural phase transition
from a tetrag... | 1210.3645v1 |
2012-11-20 | Optically excited multi-band conduction in LaAlO3/SrTiO3 heterostructures | The low-temperature resistance of a conducting LaAlO3/SrTiO3 interface with a
10 nm thick LaAlO3 film decreases by more than 50% after illumination with
light of energy higher than the SrTiO3 band-gap. We explain our observations by
optical excitation of an additional high mobility electron channel, which is
spatially ... | 1211.4778v1 |
2013-12-04 | Physical characteristics and cation distribution of NiFe2O4 thin films with high resistivity prepared by reactive co-sputtering | We fabricated NiFe2O thin films on MgAl2O4 (001) substrates by reactive dc
magnetron co-sputtering in a pure oxygen atmosphere at different substrate
temperatures. The film properties were investigated by various techniques with
a focus on their structure, surface topography, magnetic characteristics, and
transport pro... | 1312.1086v1 |
2013-12-13 | Low-energy electronic properties of clean CaRuO$_3$: elusive Landau quasiparticles | We have prepared high-quality epitaxial thin films of CaRuO$_3$ with residual
resistivity ratios up to 55. Shubnikov-de Haas oscillations in the
magnetoresistance and a $T^2$ temperature dependence in the electrical
resistivity only below 1.5 K, whose coefficient is substantially suppressed in
large magnetic fields, es... | 1312.3809v1 |
2017-10-18 | Near-thermal limit gating in heavily-doped III-V semiconductor nanowires using polymer electrolytes | Doping is a common route to reducing nanowire transistor on-resistance but
has limits. High doping level gives significant loss in gate performance and
ultimately complete gate failure. We show that electrolyte gating remains
effective even when the Be doping in our GaAs nanowires is so high that
traditional metal-oxid... | 1710.06950v2 |
2018-02-02 | Magneto-transport properties of proposed triply degenerate topological semimetal Pd$_{3}$Bi$_{2}$S$_{2}$ | We report transport properties of single-crystalline Pd$_{3}$Bi$_{2}$S$_{2}$,
which has been predicted to host an unconventional electronic phase of matter
beyond three-dimensional Dirac and Weyl semimetals. Similar to several
topological systems, the resistivity shows field induced
metal-semiconductor-like crossover a... | 1802.00712v2 |
2019-09-17 | Spin-Orbit-Torque Field-Effect Transistor (SOTFET): Proposal for a New Magnetoelectric Memory | Spin-based memories are attractive for their non-volatility and high
durability but provide modest resistance changes, whereas semiconductor logic
transistors are capable of large resistance changes, but lack memory function
with high durability. The recent availability of multiferroic materials
provides an opportunity... | 1909.08133v3 |
2017-03-09 | Transport properties of iron at the Earth's core conditions: the effect of spin disorder | The electronic and thermal transport properties of the Earth's core are
crucial for many geophysical models such as the geodynamo model of the Earth's
magnetic field and of its reversals. Here we show, by considering bcc-iron and
iron-rich iron-silicon alloy as a representative of the Earth's core
composition and apply... | 1703.03205v3 |
2020-04-07 | Large-scalable fabrication of improved Bi-Te-based flexible thermoelectric modules using a semiconductor manufacturing process | Among the several flexible thermoelectric modules in existence, sintered
Bi-Te-based modules represent a viable option because of their high output
power density and flexibility, which enables the use of arbitrary heat sources.
We have fabricated Bi-Te-based modules with a large-scalable fabrication
process and improve... | 2004.03068v1 |
2020-09-24 | Pressure-Temperature Phase Diagram of $α$-Mn | Electrical resistivity and ac-susceptibility measurements under high pressure
were carried out in high-quality single crystals of $\alpha$-Mn. The
pressure-temperature phase diagram consists of an antiferromagnetic ordered
phase (0<$P$<1.4 GPa, $T<T_{\rm N}$), a pressure-induced ordered phase
(1.4<$P$<4.2-4.4 GPa, $T<T... | 2009.11488v1 |
2012-01-09 | Physical properties of $A_x$Fe$_{2-y}$S$_2$ ($A$=K, Rb and Cs) single crystals | We successfully synthesized two new compounds Rb$_x$Fe$_{2-y}$S$_2$ and
Cs$_x$Fe$_{2-y}$S$_2$ which were isostructural with K$_x$Fe$_{2-y}$Se$_2$
superconductor. We systematically investigated the resistivity, magnetism and
thermoelectric power of $A_x$Fe$_{2-y}$S$_2$ ($A$=K, Rb and Cs) single
crystals. High temperatur... | 1201.1709v1 |
2019-03-12 | Single-crystal growth and extremely high H_c2 of 12442-type Fe-based superconductor KCa_2Fe_4As_4F_2 | Millimeter sized single crystals of KCa_2Fe_4As_4F_2 were grown using a
self-flux method. The chemical compositions and crystal structure were
characterized carefully. Superconductivity with the critical transition T_c =
33.5 K was confirmed by both the resistivity and magnetic susceptibility
measurements. Moreover, th... | 1903.04822v1 |
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