publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
|---|---|---|---|
2023-11-14 | Observation of high-temperature superconductivity in the high-pressure tetragonal phase of La2PrNi2O7-δ | The recent discovery of high-temperature superconductivity in the
Ruddlesden-Popper phase La3Ni2O7 under high pressure marks a significant
breakthrough in the field of 3d transition-metal oxide superconductors. For an
emerging novel class of high-Tc superconductors, it is crucial to find more
analogous superconducting ... | 2311.08212v2 |
1999-01-11 | SQUID based resistance bridge for shot noise measurement on low impedance samples | We present a resistance bridge which uses a SQUID to measure the shot noise
in low impedance samples. The experimental requirements are high DC bias
currents (typically 10mA) together with high AC sensitivity (pA/VHz). This
system is used to investigate the shot noise in
Superconductor/Normal/Superconductor junctions w... | 9901090v2 |
1999-05-12 | Nonmonotonic Temperature-dependent Resistance in Low Density 2D Hole Gases | The low temperature longitudinal resistance-per-square Rxx(T) in ungated
GaAs/AlGaAs quantum wells of high peak hole mobility 1.7x10^6 cm^2/Vs is
metallic for 2D hole density p as low as 3.8x10^9 cm-2. The electronic
contribution to the resistance, R_{el}(T), is a nonmonotonic function of T,
exhibiting thermal activati... | 9905176v1 |
2005-07-28 | Phononless thermally activated transport through a disordered array of quantum wires | Phononless plasmon assisted transport through a long disordered array of
finite length quantum wires is investigated analytically. Two temperature
regimes, the low- and the high-temperature ones, with qualitatively different
temperature dependencies of thermally activated resistance are identified. The
characteristics ... | 0507687v1 |
2007-02-22 | High-field Hall resistivity and magnetoresistance in electron-doped Pr_2-xCe_xCuO_{4-δ} | We report resistivity and Hall effect measurements in electron-doped
Pr$_{2-x}$Ce$_{x}$CuO$_{4-\delta}$ films in magnetic field up to 58 T. In
contrast to hole-doped cuprates, we find a surprising non-linear magnetic field
dependence of Hall resistivity at high field in the optimally doped and
overdoped films. We also ... | 0702534v2 |
2007-01-13 | First Tests of Thick GEMs with Electrodes Made of a Resistive Kapton | We have developed a new design of a GEM-like detector with single-layer
electrodes made of a resistive kapton. This detector can operate at gains close
to 10E5 even in pure Ar and Ne and if transited to discharges at higher gains
they, due to the high resistivity of electrodes, do not damage either the
detector or the ... | 0701154v1 |
1995-07-03 | Percolation transition of the vortex lattice and c-axis resistivity in high-temperature superconductors | We use the three-dimensional Josephson junction array system as a model for
studying the temperature dependence of the c-axis resistivity of high
temperature superconductors, in the presence of an external magnetic field H
applied in the c-direction. We show that the temperature at which the
dissipation becomes differe... | 9507001v1 |
2007-06-21 | Addendum: "On the nature of the phase transition in the itinerant helimagnet MnSi", arXiv:cond-mat/0702460v1 [cond-mat.str-el] | New high resolution data for heat capacity, heat capacity under applied
magnetic fields and resistivity of high quality single crystal of MnSi are
reported. Striking mirror symmetry between temperature derivative of
resistivity and thermal expansion coefficient of MnSi is displayed. Close
similarity between variation o... | 0706.3093v1 |
2009-02-24 | Phonon-induced Resistance Oscillations in Very-high Mobility 2D Electron Systems | We report on temperature dependence of acoustic phonon-induced resistance
oscillations in very high mobility two-dimensional electron systems. We observe
that the temperature dependence is non-monotonic and that higher order
oscillations are best developed at progressively lower temperatures. Our
analysis shows that, i... | 0902.4208v1 |
2009-09-11 | Resistive g-modes in a reversed field pinch plasma | First direct experimental evidence of high frequency, high toroidal mode
number (n>20), magnetic fluctuations due to unstable resistive interchange
modes (g-modes) resonant in the edge region of a reversed field pinch (RFP)
plasma is presented. Experimental characterization of time and space
periodicities of the modes ... | 0909.2153v1 |
2010-07-16 | Zero differential resistance in two-dimensional electron systems at large filling factors | We report on a state characterized by a zero differential resistance observed
in very high Landau levels of a high-mobility two-dimensional electron system.
Emerging from a minimum of Hall field-induced resistance oscillations at low
temperatures, this state exists over a continuous range of magnetic fields
extending w... | 1007.2832v1 |
2013-10-09 | Effect of Temperature and Charged Particle Fluence on the Resistivity of Polycrystalline CVD Diamond Sensors | The resistivity of polycrystalline chemical vapor deposition diamond sensors
is studied in samples exposed to fluences relevant to the environment of the
High Luminosity Large Hadron Collider. We measure the leakage current for a
range of bias voltages on samples irradiated with 800 MeV protons up to
1.6\times 10^{16} ... | 1310.2620v1 |
2016-07-04 | Vortex motion and flux-flow resistivity in dirty multiband superconductors | The conductivity of vortex lattices in multiband superconductors with high
concentration of impurities is calculated based on microscopic kinetic theory.
Both the limits of high and low fields are considered, when the magnetic
induction is close to or much smaller than the critical field strength
$H_{c2}$, respectively... | 1607.00708v2 |
2023-02-27 | Ferromagnetism and Metal-Insulator transition in F-doped LaMnO3 | We present our studies on polycrystalline samples of fluorine doped LaMnO3
(LaMnO3-yFy). LaMnO2.5F0.5 exhibits remarkable magnetic and electrical
properties. It shows ferromagnetic and metallic behavior with a high Curie
temperature of ~ 239 K and a high magnetoresistance of -64. This drastic change
in magnetic propert... | 2302.13845v1 |
2009-07-25 | Superconductivity in Undoped Single Crystals of BaFe2As2: Field and Current Dependence | In previous work in undoped MFe2As2, partial drops in the resistivity
indicative of traces of superconductivity have been observed in some samples of
M=Ba (Tc ~ 20 K, up to 25% drop in resistivity) and M=Ca (Tc ~ 10 K, up to 45 %
drop in resistivity.) A complete drop in the resistivity to 0, along with a
finite fractio... | 0907.4429v1 |
2019-03-12 | Signatures of Anelastic Domain Relaxation in Ba(Fe$_{1-x}$Co$_{x}$)$_{2}$As$_{2}$ Investigated by Mechanical Modulation of Resistivity | The resistive response of Ba(Fe$_{1-x}$Co$_{x}$)$_{2}$As$_{2}$ to AC
mechanical deformation is considered in the multi-domain state. This resistance
change depends both upon the anelastic relaxation of domain walls and upon the
relation between resistance and the domain wall configuration. Samples are
adhered to the su... | 1903.04732v1 |
2005-02-09 | Structure, magnetic and transport properties of Ti-substituted La0.7Sr0.3MnO3 | Ti-substituted perovskites, La0.7Sr0.3Mn1-xTixO3, with x between 0 to 0.20,
were investigated by neutron diffraction, magnetization, electric resistivity,
and magnetoresistance (MR) measurements. All samples show a rhombohedral
structure (space group R3c) from 10 K to room temperature. At room temperature,
the cell par... | 0502235v1 |
2020-12-08 | Quantitative measurement of the thermal contact resistance between a glass microsphere and a plate | Accurate measurements of the thermal resistance between micro-objects made of
insulating materials are complex because of their small size, low conductivity,
and the presence of various ill-defined gaps. We address this issue using a
modified scanning thermal microscope operating in vacuum and in air. The
sphere-plate ... | 2012.04291v1 |
2002-01-19 | Antiferromagnetic Order Induced by an Applied Magnetic Field in a High-Temperature Superconductor | One view of the cuprate high-transition temperature (high-Tc) superconductors
is that they are conventional superconductors where the pairing occurs between
weakly interacting quasiparticles, which stand in one-to-one correspondence
with the electrons in ordinary metals - although the theory has to be pushed to
its lim... | 0201349v1 |
2013-01-22 | Exceptional ballistic transport in epitaxial graphene nanoribbons | Graphene electronics has motivated much of graphene science for the past
decade. A primary goal was to develop high mobility semiconducting graphene
with a band gap that is large enough for high performance applications.
Graphene ribbons were thought to be semiconductors with these properties,
however efforts to produc... | 1301.5354v2 |
2022-01-25 | KCo$_2$As$_2$: A New Portal for the Physics of High-Purity Metals | High-quality single crystals of KCo$_2$As$_2$ with the body-centered
tetragonal ThCr$_2$Si$_2$ structure were grown using KAs self flux. Structural,
magnetic, thermal, and electrical transport were investigated. No clear
evidence for any phase transitions was found in the temperature range 2 to 300
K. The in-plane elec... | 2201.10325v1 |
2023-01-25 | Investigation of Planckian behavior in a high-conductivity oxide: PdCrO$_2$ | The layered delafossite metal PdCrO$_2$ is a natural heterostructure of
highly conductive Pd layers Kondo coupled to localized spins in the adjacent
Mott insulating CrO$_2$ layers. At high temperatures $T$ it has a $T$-linear
resistivity which is not seen in the isostructural but non-magnetic PdCoO$_2$.
The strength of... | 2301.10631v1 |
1995-06-01 | Role of phason-defects on the conductance of a 1-d quasicrystal | We have studied the influence of a particular kind of phason-defect on the
Landauer resistance of a Fibonacci chain. Depending on parameters, we sometimes
find the resistance to decrease upon introduction of defect or temperature, a
behavior that also appears in real quasicrystalline materials. We demonstrate
essential... | 9506004v2 |
1997-12-12 | Surface Resistance Imaging with a Scanning Near-Field Microwave Microscope | We describe near-field imaging of sample sheet resistance via frequency
shifts in a resonant coaxial scanning microwave microscope. The frequency
shifts are related to local sample properties, such as surface resistance and
dielectric constant. We use a feedback circuit to track a given resonant
frequency, allowing mea... | 9712142v1 |
1997-12-15 | Quantitative Imaging of Sheet Resistance with a Scanning Near-Field Microwave Microscope | We describe quantitative imaging of the sheet resistance of metallic thin
films by monitoring frequency shift and quality factor in a resonant scanning
near-field microwave microscope. This technique allows fast acquisition of
images at approximately 10 ms per pixel over a frequency range from 0.1 to 50
GHz. In its cur... | 9712171v1 |
1999-07-13 | Na-site substitution effects of the thermoelectric properties of NaCo_2O_4 | The resistivity and thermopower of Na$_{1+x}$Co$_2$O$_4$ and
Na$_{1.1-x}$Ca$_x$Co$_2$O$_4$ are measured and analyzed. In
Na$_{1+x}$Co$_2$O$_4$, whereas the resistivity increases with $x$, the
thermopower is nearly independent of $x$. This suggests that the excess Na is
unlikely to supply carriers, and decreases effecti... | 9907179v1 |
1999-11-06 | Electrical Resistivity of a Thin Metallic Film | The electrical resistivity of a pure sample of a thin metallic film is found
to depend on the boundary conditions. This conclusion is supported by a
free-electron model calculation and confirmed by an ab initio relativistic
Korringa-Kohn-Rostoker computation. The low-temperature resistivity is found to
be zero for a fr... | 9911093v1 |
2000-03-09 | On the Mooij Rule | Weak localization leads to the same correction to both the conductivity and
the electron-phonon coupling constant $\lambda$ (and $\lambda_{tr}$).
Consequently the temperature dependence of the (thermal) electrical resistivity
is decreasing as the conductivity is decreasing due to weak localization, which
results in the... | 0003144v1 |
2001-05-04 | Weak localization and the Mooij rule in disordered metals | Weak localization leads to the same correction to both the conductivity and
the McMillan's electron-phonon coupling constant $\lambda$ (and
$\lambda_{tr}$). Consequently the temperature dependence of the thermal
electrical resistivity is decreasing as the conductivity is decreasing due to
weak localization, which resul... | 0105090v1 |
2001-10-31 | Stationary Regime of Random Resistor Networks Under Biased Percolation | The state of a 2-D random resistor network, resulting from the simultaneous
evolutions of two competing biased percolations, is studied in a wide range of
bias values. Monte Carlo simulations show that when the external current $I$ is
below the threshold value for electrical breakdown, the network reaches a
steady stat... | 0110646v1 |
2002-05-27 | Resistivity and thermoelectric power measurements on CeFe$_2$ and its pseudobinaries | Resistivity and thermoelectric power (TEP) measurements on CeFe$_2$ and two
of its pseudo-binaries Ce(Fe, 5% Ir)$_2$ and Ce(Fe, 7% Ru)$_2$ between 78K and
275K are reported. The resistivity data are analysed in terms of contributions
from scattering due to phonon, magnon, spin fluctuation and lattice defects,
and also ... | 0205539v1 |
2003-02-12 | Temperature Dependence of the Dielectric Constant and Resistivity of Diluted Magnetic Semiconductors | We study the effect that the ferromagnetic order has on the electrical
properties of Diluted Magnetic Semiconductors. We analyze the temperature
dependence of the dielectric constant and of the resistivity of
Ga$_{1-x}$Mn$_x$As. In our treatment the electronic structure of the
semiconductor is described by a six band K... | 0302237v1 |
2003-02-19 | Small-polaron hopping conductivity in bilayer manganite La$_{1.2}$Sr$_{1.8}$Mn$_{2}$O$_{7}$ | We report anisotropic resistivity measurements on a
La$_{1.2}$Sr$_{1.8}$Mn$_{2}$O$_{7}$ single crystal over a temperature $T$ range
from 2 to 400 K and in magnetic fields $H$ up to 14 T. For $T\geq 218$ K, the
temperature dependence of the zero-field in-plane $\rho_{ab}(T)$ resistivity
obeys the adiabatic small polaron... | 0302392v1 |
2003-07-21 | Detecting percolative metal-insulator transition in manganites by resistive relaxation | We report an experimental study of the time dependence of resistivity of a
La$_{0.9}$Sr$_{0.1}$MnO$_{3}$ ultrathin film in order to elucidate the
underlying mechanism for metal-insulator transition and colossal
magnetoresistance CMR effect. There is a clear change of sign in the resistive
relaxation rate across the met... | 0307501v1 |
2004-11-24 | Electrical Spin Injection in Multi-Wall carbon NanoTubes with transparent ferromagnetic contacts | We report on electrical spin injection measurements on MWNTs . We use a
ferromagnetic alloy Pd$_{1-x}$Ni$_{x}$ with x $\approx$ 0.7 which allows to
obtain devices with resistances as low as 5.6 $k\Omega$ at 300 $K$. The yield
of device resistances below 100 $k\Omega$, at 300 $K$, is around 50%. We
measure at 2 $K$ a hy... | 0411623v2 |
2005-04-22 | Possible Localization Behavior of the Inherent Conducting Polymer (CH$_3$)$_{0.9}$ReO$_3$ | Polymeric methyltrioxorhenium (poly-MTO) represents the first example of an
inherent conducting organometallic oxide. It adopts the structural motives and
transport properties of some classical perovskites in two dimensions. In this
study we present resistivity data down to 30 mK which exhibit a crossover from
a metall... | 0504585v1 |
2005-04-27 | Colossal resistivity change besides magnetoresistance: an extended theoretical framework for electronic transport of manganites | Current theoretical approaches to manganites mainly stem from magnetic
framework, in which the electronic transport is thought to be spin-dependent
and the double exchange mechanism plays a core role. However, quite a number of
experimental observations can yet not be reasonably explained. For example,
multiplicate ins... | 0504706v2 |
2006-01-31 | Phase coexistence and resistivity near the ferromagnetic transition of manganites | Pairing of oxygen holes into heavy bipolarons in the paramagnetic phase and
their magnetic pair-breaking in the ferromagnetic phase [the so-called
current-carrier density collapse (CCDC)] has accounted for the first-order
ferromagnetic phase transition, colossal magnetoresistance (CMR), isotope
effect, and pseudogap in... | 0601712v2 |
2006-02-03 | Boundary resistance in magnetic multilayers | Quasiclassical boundary conditions for electrochemical potentials at the
interface between diffusive ferromagnetic and non-magnetic metals are derived
for the first time. An expression for the boundary resistance accurately
accounts for the momentum conservation law as well as essential gradients of
the chemical potent... | 0602070v1 |
2006-06-23 | Angular dependence of domain wall resistivity in artificial magnetic domain structures | We exploit the ability to precisely control the magnetic domain structure of
perpendicularly magnetized Pt/Co/Pt trilayers to fabricate artificial domain
wall arrays and study their transport properties. The scaling behaviour of this
model system confirms the intrinsic domain wall origin of the
magnetoresistance, and s... | 0606614v1 |
2006-07-26 | Angle-dependent magnetotransport in cubic and tetragonal ferromagnets: Application to (001)- and (113)A-oriented (Ga,Mn)As | General expressions for the longitudinal and transverse resistivities of
single-crystalline cubic and tetragonal ferromagnets are derived from a series
expansion of the resistivity tensor with respect to the magnetization
orientation. They are applied to strained (Ga,Mn)As films, grown on (001)- and
(113)A-oriented GaA... | 0607679v1 |
2006-11-14 | Calculations of spin-disorder resistivity from first principles | Spin-disorder resistivity of Fe and Ni is studied using the noncollinear
density functional theory. The Landauer conductance is averaged over random
disorder configurations and fitted to Ohm's law. The distribution function is
approximated by the mean-field theory. The dependence of spin-disorder
resistivity on magneti... | 0611377v2 |
2007-04-04 | Vortex Dynamics at the Initial Stage of Resistive Transition in Superconductors with Fractal Cluster Structure | The effect of fractal normal-phase clusters on vortex dynamics in a
percolative superconductor is considered. The superconductor contains
percolative superconducting cluster carrying a transport current and clusters
of a normal phase, acting as pinning centers. A prototype of such a structure
is YBCO film, containing c... | 0704.0494v1 |
2008-02-19 | Temperature memory and resistive glassy behaviors of a perovskite manganite | This paper reports the observations of long-time relaxation, aging, and
temperature memory behaviors of resistance and magnetization in the
ferromagnetic state of a polycrystalline La0.7Ca0.3Mn0.925Ti0.075O3 compound.
The observed glassy dynamics of the electrical transport appears to be
magnetically originated and has... | 0802.2729v1 |
2008-02-26 | Effects of heat dissipation on unipolar resistance switching in Pt/NiO/Pt capacitors | We fabricated Pt/NiO/Pt capacitor structures with various bottom electrode
thicknesses, $t_{BE}$, and investigated their resistance switching behaviors.
The capacitors with $t_{BE} \geq 50$ nm exhibited typical unipolar resistance
memory switching, while those with $t_{BE} \leq 30$ nm showed threshold
switching. This i... | 0802.3739v1 |
2008-08-25 | Stability and normal zone propagation speed in YBCO coated conductors with increased interfacial resistance | We will discuss how stability and speed of normal zone propagation in
YBCO-coated conductors is affected by interfacial resistance between the
superconducting film and the stabilizer. Our numerical simulation has shown
that the increased interfacial resistance substantially increases speed of
normal zone propagation an... | 0808.3409v3 |
2008-12-12 | Magnetic tunnel junctions with ferroelectric barriers: Prediction of four resistance states from first-principles | Magnetic tunnel junctions (MTJs), composed of two ferromagnetic electrodes
separated by a thin insulating barrier layer, are currently used in spintronic
devices, such as magnetic sensors and magnetic random access memories.
Recently, driven by demonstrations of ferroelectricity at the nanoscale,
thin-film ferroelectri... | 0812.2393v1 |
2008-12-23 | Specific Resistance of Pd/Ir Interfaces | From measurements of the current-perpendicular-to-plane (CPP) total specific
resistance (AR = area times resistance) of sputtered Pd/Ir multilayers, we
derive the interface specific resistance, 2AR(Pd/Ir) = 1.02 +/- 0.06 fOhmm^2,
for this metal pair with closely similar lattice parameters. Assuming a single
fcc crystal... | 0812.4421v1 |
2010-01-11 | Anomalous Hall Effect in Fe/Gd Bilayers | Non-monotonic dependence of anomalous Hall resistivity on temperature and
magnetization, including a sign change, was observed in Fe/Gd bilayers. To
understand the intriguing observations, we fabricated the Fe/Gd bilayers and
single layers of Fe and Gd simultaneously. The temperature and field
dependences of longitudin... | 1001.1586v2 |
2010-10-26 | Evanescent incompressible strips as origin of the observed Hall resistance overshoot | In this work we provide a systematic explanation to the unusual non-monotonic
behavior of the Hall resistance observed at two-dimensional electron systems.
We use a semi-analytical model based on the interaction theory of the integer
quantized Hall effect to investigate the existence of the anomalous, \emph{i.e}
oversh... | 1010.5432v1 |
2010-12-13 | Distinct electronic nematicities between electron and hole underdoped iron pnictides | We systematically investigated the in-plane resistivity anisotropy of
electron-underdoped $EuFe_{2-x}Co_xAs_2$ and $BaFe_{2-x}Co_xAs_2$, and
hole-underdoped $Ba_{1-x}K_xFe_2As_2$. Large in-plane resistivity anisotropy
was found in the former samples, while {\it tiny} in-plane resistivity
anisotropy was detected in the ... | 1012.2731v1 |
2011-01-31 | Phase Mixing of Nonlinear Visco-resistive Alfvén Waves | We investigate the behaviour of nonlinear, nonideal Alfv\'en wave propagation
within an inhomogeneous magnetic environment. The governing MHD equations are
solved in 1D and 2D using both analytical techniques and numerical simulations.
We find clear evidence for the ponderomotive effect and visco-resistive
heating. The... | 1101.5945v1 |
2011-03-04 | Voltage bias induced modification of all oxide Pr0.5Ca0.5MnO3/SrTi0.95Nb.05O3 junctions | In this paper we report what happens to a pristine oxide junction
Pr0.5Ca0.5MnO3/SrTi0.95Nb.05O3 (PCMO/Nb:STO), when it is subjected to cycling
of voltage bias of moderate value ({\pm}4V). It is found that the initial
cycling leads to formation of a permanent state of lower resistance where the
lower resistance arises ... | 1103.0884v1 |
2011-07-11 | Magnetotransport properties of iron microwires fabricated by focused electron beam induced autocatalytic growth | We have prepared iron microwires in a combination of focused electron beam
induced deposition (FEBID) and autocatalytic growth from the iron
pentacarbonyl, Fe(CO)5, precursor gas under UHV conditions. The electrical
transport properties of the microwires were investigated and it was found that
the temperature dependenc... | 1107.2014v1 |
2011-08-11 | Effect of Electron-electron Interaction on Surface Transport in Three-Dimensional Topological Insulators | We study the effect of electron-electron interaction on the surface
resistivity of three-dimensional (3D) topological insulators. In the absence of
umklapp scattering, the existence of the Fermi-liquid ($T^2$) term in
resistivity of a two-dimensional (2D) metal depends on the Fermi surface
geometry, in particular, on w... | 1108.2435v1 |
2011-10-31 | Spin Transfer from a Ferromagnet into a Semiconductor through an Oxide barrier | We present results on the magnetoresistance of the system Ni/Al203/n-doped
Si/Al2O3/Ni in fabricated nanostructures. The results at temperature of 14K
reveal a 75% magnetoresistance that decreases in value up to approximately 30K
where the effect disappears. We observe minimum resistance in the antiparallel
configurati... | 1110.6810v1 |
2012-08-22 | Why is the bulk resistivity of topological insulators so small? | As-grown topological insulators (TIs) are typically heavily-doped $n$-type
crystals. Compensation by acceptors is used to move the Fermi level to the
middle of the band gap, but even then TIs have a frustratingly small bulk
resistivity. We show that this small resistivity is the result of band bending
by poorly screene... | 1208.4601v2 |
2012-09-26 | Substrate effect on the resistive switching in BiFeO3 thin films | BiFeO3 thin films have been deposited on Pt/sapphire and Pt/Ti/SiO2/Si
substrates with pulsed laser deposition using the same growth conditions,
respectively. Au was sputtered as the top electrode. The microscopic structure
of the thin film varies by changing the underlying substrate. Thin films on
Pt/sapphire are not ... | 1209.5868v1 |
2012-10-22 | Thickness-dependent structural, magnetic and transport properties of epitaxial Co2FeAl Heusler alloy thin films | We report on a systematic study of the structural, magnetic properties and
the anomalous Hall effect, in the Heusler alloy Co2FeAl (CFA) epitaxial films
on MgO(001), as a function of film thickness. It was found that the epitaxial
CFA films show a highly ordered B2 structure with an in-plane uniaxial magnetic
anisotrop... | 1210.5807v1 |
2012-12-06 | Barkhausen-type noise in the resistance of antiferromagnetic Cr thin films | We present an experimental study of the changes generated on the electrical
resistance $R(T)$ of epitaxial Cr thin films by the transformation of quantized
spin density wave domains as the temperature is changed. A characteristic
resistance noise appears only within the same temperature region where a
cooling-warming c... | 1212.1411v1 |
2012-12-10 | YCr6Ge6 as a Candidate Compound for a Kagome Metal | We show that YCr6Ge6, comprising a kagome lattice made up of Cr atoms, is a
plausible candidate compound for a kagome metal that is expected to exhibit
anomalous phenomena such as flat-band ferromagnetism. Resistivity,
magnetization, and heat capacity are measured on single crystals of YCr6Ge6,
and band structure calcu... | 1212.1976v1 |
2013-03-26 | Quantum corrections to conductivity in Si doped ZnO thin films | Si doped ZnO thin films with Si concentrations ranging from 0.4 to 10 % have
been grown by sequential pulsed laser deposition on sapphire substrates. The
resistivity of the films first decreased from ~ 6.6x10-3 to 4.7x10-4 ohm-cm as
the Si concentration was increased from ~ 0.4 to 2% and then it increased with
further ... | 1303.6443v2 |
2013-08-29 | Percolation model for a selective response of the resistance of composite semiconducting np-systems towards reducing gases | It is shown that a two-component percolation model can explain an
experimentally observed behavior, namely that a network built up by a mixture
of sintered nanocrystalline semiconducting n- and p-grains can exhibit
selective behavior, i.e. respond with a resistance increase when exposed to a
reducing gas A and with a r... | 1308.6442v2 |
2013-11-08 | Low-Contact-Resistance Graphene Devices with Nickel-Etched-Graphene Contacts | The performance of graphene-based transistors is often limited by the large
electrical resistance across the metal-graphene contact. We report an approach
to achieve ultra-low resistance metal contacts to graphene transistors. Through
a process of metal-catalyzed etching in hydrogen, multiple nano-sized pits with
zigza... | 1311.1944v2 |
2014-06-14 | Negative magnetoresistance dynamics in expanded graphite under hydrostatic pressure up to 1.8 GPa | Basal plane resistivity of expanded graphite was studied under simultaneous
influence of hydrostatic pressure up to 1.8 GPa and magnetic field 0.8 T in the
77-300 K temperature region. Magnetic field induces negative magnetoresistance
in the sample within all temperature and pressure range studied. A change in
resistiv... | 1406.3770v1 |
2014-06-23 | Control of Thermoelectric Properties of ZnO using Electric Double Layer | We have successfully controlled thermoelectric properties of ZnO by changing
carrier concentration using an electric double layer transistor (EDLT) which is
a feld effect transistor gated by electrolyte solution. The resistivity and the
thermopower decreased abruptly by applying gate voltage larger than a threshold
vol... | 1406.5850v1 |
2014-09-28 | Universal Ratio of Intrinsic Resistivities of Spin Helix in B20 (Fe-Co)Si Magnets | The B20 magnets with the Dzyaloshinskii-Moriya (D-M) interaction exhibit spin
helix and Skyrmion spin textures unattainable in traditional Heisenberg
ferromagnets. We have determined the intrinsic resistivity of the spin helix,
which is a macroscopic Bloch domain wall, in B20 (Fe-Co)Si magnets. We found a
universal res... | 1409.7869v1 |
2014-11-13 | Graphene-Passivated Nickel as an Oxidation-Resistant Electrode for Spintronics | We report on graphene-passivated ferromagnetic electrodes (GPFE) for spin
devices. GPFE are shown to act as spin-polarized oxidation-resistant
electrodes. The direct coating of nickel with few layer graphene through a
readily scalable chemical vapour deposition (CVD) process allows the
preservation of an unoxidized nic... | 1411.3476v1 |
2014-11-22 | Crystal growth, resistivity and Hall effect of the delafossite metal PtCoO$_2$ | We report single crystal growth of the delafossite oxide PtCoO$_2$, and basic
transport measurements on single crystals etched to well-defined geometries
using focused ion beam techniques. The room temperature resistivity is 2.1
$\mu\Omega$ cm, and the Hall coefficient is consistent with the existence of
one free elect... | 1411.6162v2 |
2015-03-02 | High-Q operation of SRF cavities: The potential impact of thermocurrents on the RF surface resistance | For many new accelerator applications, superconducting radio frequency (SRF)
systems are the enabling technology. In particular for CW applications, much
effort is being expended to minimize the power dissipation (surface resistance)
of niobium cavities. Starting in 2009, we suggested a means of reducing the
residual r... | 1503.00601v2 |
2015-05-28 | Effect of the interface resistance in non-local Hanle measurements | We use lateral spin valves with varying interface resistance to measure
non-local Hanle effect in order to extract the spin-diffusion length of the
non-magnetic channel. A general expression that describes spin injection and
transport, taking into account the influence of the interface resistance, is
used to fit our re... | 1505.07592v1 |
2016-01-25 | Lower limits of line resistance in nanocrystalline Back End of Line Cu interconnects | The strong non-linear increase in Cu interconnect line resistance with a
decrease in linewidth presents a significant obstacle to their continued
downscaling. In this letter we use first principles density functional theory
based electronic structure of Cu interconnects to find the lower limits of
their line resistance... | 1601.06675v2 |
2016-05-12 | NdCeCuO - NdCeO boundary and resistive switchings in mesoscopic structures on base of epitaxial NdCeCuO films | Reverse and stable bipolar resistive switching effect was observed in planar
NdCeCuO - NdCeO - Ag heterostructures. It was shown that the current voltage
charactereriscs of the BRSE observed has a diode character. Simulations were
used to consider the influence of the nonuniform distribution of an electric
field at the... | 1605.03913v1 |
2016-08-25 | Resistive Switching in Aqueous Nanopores by Shock Electrodeposition | Solid-state programmable metallization cells have attracted considerable
attention as memristive elements for Redox-based Resistive Random Access Memory
(ReRAM) for low-power and low-voltage applications. In principle, liquid-state
metallization cells could offer the same advantages for aqueous systems, such
as biomedi... | 1608.07007v1 |
2017-02-17 | An alternative to the spin-coupled interface resistance for describing heat generation | Using a macroscopic approach, we studied theoretically the heat generation in
a typical spin valve with nonmagnetic spacer layer of finite thickness. Our
analysis shows that the spin-dependent heat generation cannot be interpreted as
the Joule heating of the spin-coupled interface resistance except for some
special seg... | 1702.05283v1 |
2017-09-27 | Kapitza thermal resistance across individual grain boundaries in graphene | We study heat transport across individual grain boundaries in suspended
monolayer graphene using extensive classical molecular dynamics (MD)
simulations. We construct bicrystalline graphene samples containing grain
boundaries with symmetric tilt angles using the two-dimensional phase field
crystal method and then relax... | 1709.09529v1 |
2017-12-08 | A Novel Effect of Electron Spin Resonance on Electrical Resistivity | We extend the well known phenomenon of magnetoresistance (extra resistivity
of materials in transverse magnetic field) to a new and unexplored regime where
in addition to a transverse magnetic field, a transverse AC field of resonant
frequency is also applied. In a magnetic field, electron spin levels are Zeeman
split.... | 1712.03062v1 |
2017-12-11 | Finite Size Effects in Highly Scaled Ruthenium Interconnects | Ru has been considered a candidate to replace Cu-based interconnects in VLSI
circuits. Here, a methodology is proposed to predict the resistivity of (Ru)
interconnects. First, the dependence of the Ru thin film resistivity on the
film thickness is modeled by the semiclassical Mayadas-Shatzkes (MS) approach.
The fitting... | 1712.03859v2 |
2017-12-23 | A micromechanics-based analytical solution for the effective thermal conductivity of composites with orthotropic matrices and interfacial thermal resistance | We obtained an analytical solution for the effective thermal conductivity of
composites composed of orthotropic matrices and spherical inhomogeneities with
interfacial thermal resistance using a micromechanics-based homogenization. We
derived the closed form of a modified Eshelby tensor as a function of the
interfacial... | 1712.08715v2 |
2019-09-06 | Strong suppression of the resistivity near the transition to superconductivity in narrow micro-bridges in external magnetic fields | We have investigated a series of superconducting bridges based on homogeneous
amorphous WSi and MoSi films, with bridge widths w ranging from 2 um to 1000 um
and film thicknesses d ~ 4-6 nm and 100 nm. Upon decreasing the bridge widths
below the respective Pearl lengths, we observe in all cases distinct changes in
the ... | 1909.02915v2 |
2019-09-13 | Tunable resistivity exponents in the metallic phase of epitaxial nickelates | We report a detailed analysis of the electrical resistivity exponent of thin
films of NdNiO3 as a function of epitaxial strain. Strain-free thin-films show
a linear dependence of the resistivity vs temperature, consistent with a
classical Fermi gas ruled by electron-phonon interactions. In addition, the
apparent temper... | 1909.06256v1 |
2014-08-08 | Effects of Lifshitz Transition on Charge Transport in Magnetic Phases of Fe-Based Superconductors | The unusual temperature dependence of the resistivity and its in-plane
anisotropy observed in the Fe-based superconducting materials, particularly
Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$, has been a longstanding puzzle. Here we
consider the effect of impurity scattering on the temperature dependence of the
average resistivity w... | 1408.1933v3 |
2019-07-01 | A perspective on effective medium models of thermal conductivity in (ultra)nanocrystalline diamond films | Thermal conductivity of nanocrystalline and ultra-nanocrystalline films is
analyzed with effective medium theory (EMT) models. The existing EMT models use
the spherical inclusion approximation. Although this approximation works quite
well it is inconsistent, mostly with respect to the maximal packing of 74{\%},
which m... | 1907.00753v1 |
2016-03-02 | Giant Frictional Drag in Double Bilayer Graphene Heterostructures | We study the frictional drag between carriers in two bilayer graphene flakes
separated by a 2 $-$ 5 nm thick hexagonal boron nitride dielectric. At
temperatures ($T$) lower than $\sim$ 10 K, we observe a large anomalous
negative drag emerging predominantly near the drag layer charge neutrality. The
anomalous drag resis... | 1603.00757v1 |
2017-04-05 | Stateful characterization of resistive switching TiO2 with electron beam induced currents | Metal oxide resistive switches are increasingly important as possible
artificial synapses in next generation neuromorphic networks. Nevertheless,
there is still no codified set of tools for studying properties of the devices.
To this end, we demonstrate electron beam induced current measurements as a
powerful method to... | 1704.01475v2 |
2017-08-31 | Antiferromagnetic anisotropy determination by spin Hall magnetoresistance | An electric method for measuring magnetic anisotropy in antiferromagnetic
insulators (AFIs) is proposed. When a metallic film with strong spin-orbit
interactions, e.g., platinum (Pt), is deposited on an AFI, its resistance
should be affected by the direction of the AFI N eel vector due to the spin
Hall magnetoresistanc... | 1708.09564v1 |
2019-08-12 | Graphene-based spinmechatronic valve | Interlayer twist between van der Waals graphene crystals led to the discovery
of superconducting and insulating states near the magic angle. In this work, we
exploit this mechanical degree of freedom by twisting the graphene middle layer
in a trilayer graphene spacer between two metallic lead (Magnetic and
nonmagnetic)... | 1908.04076v1 |
2019-08-15 | Observation of Highly Nonlinear Resistive Switching of Al2O3/TiO2-x Memristors at Cryogenic Temperature (1.5 K) | In this work, we investigate the behavior of Al2O3/TiO2-x cross-point
memristors in cryogenic environment. We report successful resistive switching
of memristor devices from 300 K down to 1.5 K. The I-V curves exhibit negative
differential resistance effects between 130 and 1.5 K, attributed to a
metal-insulator transi... | 1908.05545v4 |
2018-07-28 | Anomalous Hall Effect and Spin Fluctuations in Ionic Liquid Gated SrCoO$_3$ Thin Films | The recent realization of epitaxial SrCoO$_3$ thin films has triggered a
renewed interest in their electronic, magnetic, and ionic properties. Here we
uncover several unusual magneto-transport properties of this compound,
suggesting that it hosts persistent spin fluctuation down to low temperatures.
We achieve the meta... | 1807.10877v1 |
2019-01-14 | Phonon and electronic structures and resistance of layered electride Ca2N: DFT calculations | The phonon and electronic properties, the Eliashberg function and the
temperature dependence of resistance of electride Ca2N are investigated by the
DFT-LDA plane-wave method. The phonon dispersion, the partial phonon density of
states and the atomic eigenvectors of zero-center phonons are studied. The
electronic band ... | 1901.04594v1 |
2020-05-22 | VoteAgain: A scalable coercion-resistant voting system | The strongest threat model for voting systems considers coercion resistance:
protection against coercers that force voters to modify their votes, or to
abstain. Existing remote voting systems either do not provide this property;
require an expensive tallying phase; or burden users with the need to store
cryptographic k... | 2005.11189v3 |
2020-06-06 | Radiative Resistance at The Nano-scale: Thermal Barrier | In present article the radiative thermal current and radiative resistance are
introduced and investigated in a system of parallel slabs. The system is placed
in an environment with a constant temperature and subjected to a constant
temperature gradient, which causes a radiative energy flux through the system.
We have c... | 2006.03842v4 |
2020-08-16 | Strange metal behavior of the Hall angle in twisted bilayer graphene | Twisted bilayer graphene (TBG) with interlayer twist angles near the magic
angle $\approx 1.08^{\circ}$ hosts flat bands and exhibits correlated states
including Mott-like insulators, superconductivity and magnetism. Here we report
combined temperature-dependent transport measurements of the longitudinal and
Hall resis... | 2008.06907v1 |
2020-08-23 | Negative resistance state in superconducting NbSe$_2$ induced by surface acoustic waves | We report a negative resistance, namely, a voltage drop along the opposite
direction of a current flow, in the superconducting gap of NbSe$_2$ thin films
under the irradiation of surface acoustic waves (SAWs). The amplitude of the
negative resistance becomes larger by increasing the SAW power and decreasing
temperature... | 2008.09948v1 |
2020-11-17 | Effect of Substrate Roughness on Oxidation Resistance of an Aluminized Ni-Base Superalloy | In the present work, it is shown that the surface preparation method used on
two Ni-based superalloys prior to aluminizing chemical vapor deposition (CVD)
is one of the most important factors determining the oxidation resistance of
aluminized Ni-based superalloys. It was found that grit blasting the substrate
surface n... | 2011.08921v1 |
2021-04-23 | Microstructure and wear resistance of Fe-Cr-C-Mo-V-Ti-N hardfacing layers | In this paper, to improve wear resistance of components such as screws under
severe friction-wear, Fe-Cr-C-Mo-V-Ti-N hardfacing coatings were further
developed. The hardfacing coatings were acquired by shielded manual arc welding
(SMAW) method. The ferroalloys added into the coating flux of the hardfaced
electrode were... | 2104.11402v1 |
2021-05-27 | Systematic manipulation of the surface conductivity of SmB$_6$ | We show that the resistivity plateau of SmB$_6$ at low temperature, typically
taken as a hallmark of its conducting surface state, can systematically be
influenced by different surface treatments. We investigate the effect of
inflicting an increasing number of hand-made scratches and microscopically
defined focused ion... | 2105.13057v1 |
2021-06-23 | A new symmetry-based extraction method of Schottky diode parameters from resistance-compensated I-V characteristics | We present a novel resistance-compensated I-V method to extract the series
resistance, ideality factor, barrier height and built-in potential of a
metal-semiconductor diode. We show that a reduced equation arises from a unique
but hitherto unreported symmetry in the Schottky equation when it is written as
an ordinary d... | 2106.12324v1 |
2021-08-19 | Influence of charged walls and defects on DC resistivity and dielectric relaxation in Cu-Cl boracite | Charged domain walls form spontaneously in Cu-Cl boracite on cooling through
the phase transition. These walls exhibit changed conductivity compared to the
bulk and motion consistent with the existence of negative capacitance. Here, we
present the dielectric permittivity and DC resistivity of bulk Cu-Cl boracite
as a f... | 2108.08582v2 |
2022-01-10 | Designs for programmable quantum resistance standards based on epitaxial graphene p-n junctions | We report the fabrication and measurement of top gated epitaxial graphene p-n
junctions where exfoliated hexagonal boron nitride (h-BN) is used as the gate
dielectric. The four-terminal longitudinal resistance across a single junction
is well quantized at the von Klitzing constant R_K with a relative uncertainty
of 10-... | 2201.03621v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.