publicationDate stringlengths 10 10 | title stringlengths 17 233 | abstract stringlengths 20 3.22k | id stringlengths 9 12 |
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2020-08-11 | Anomalous Hall effect in half-metallic Heusler compound Co$_{2}$Ti$X$ ($X$=Si, Ge) | Though Weyl fermions have recently been observed in several materials with
broken inversion symmetry, there are very few examples of such systems with
broken time reversal symmetry. Various Co$_{2}$-based half-metallic
ferromagnetic Heusler compounds are lately predicted to host Weyl type
excitations in their band stru... | 2008.04837v1 |
2021-03-24 | Manipulating Berry curvature of SrRuO3 thin films via epitaxial strain | Berry curvature plays a crucial role in exotic electronic states of quantum
materials, such as intrinsic anomalous Hall effect. As Berry curvature is
highly sensitive to subtle changes of electronic band structures, it can be
finely tuned via external stimulus. Here, we demonstrate in SrRuO3 thin films
that both the ma... | 2103.12973v1 |
2022-06-06 | Anomalous Transport Properties of Re$_3$Ge$_7$ | Single crystals of intermetallic Re$_3$Ge$_7$ were grown and characterized by
measuring magnetization, electrical resistivity, Hall coefficient, and specific
heat. Magnetization measurements show the material is weakly diamagnetic. A
phase transition is indicated by a kink in magnetic susceptibility at $T_{c} =
58.5$K ... | 2206.02943v1 |
2022-06-28 | Colossal piezoresistance in narrow-gap Eu5In2Sb6 | Piezoresistance, the change of a material's electrical resistance ($R$) in
response to an applied mechanical stress ($\sigma$), is the driving principle
of electromechanical devices such as strain gauges, accelerometers, and
cantilever force sensors. Enhanced piezoresistance has been traditionally
observed in two class... | 2206.14073v1 |
2022-07-06 | Sn2Pd: a possible superconducting material with topological surface states | In this article, we report the detailed magneto transport measurements of the
topological semimetal (TSM) candidate, Sn2Pd. Single crystal of Sn2Pd is
synthesized through the self-flux method. Phase purity and crystalline
morphology are confirmed through powder X ray diffraction (PXRD) pattern and
field emission scanni... | 2207.02579v1 |
2023-03-17 | On the determination of the thermal shock parameter of MAX phases: A combined experimental-computational study | Thermal shock resistance is one of the performance-defining properties for
applications where extreme temperature gradients are required. The thermal
shock resistance of a material can be described by means of the thermal shock
parameter RT. Here, the thermo-mechanical properties required for the
calculation of RT are ... | 2303.10266v2 |
2023-05-18 | Observation and enhancement of room temperature bilinear magnetoelectric resistance in sputtered topological semimetal Pt3Sn | Topological semimetal materials have become a research hotspot due to their
intrinsic strong spin-orbit coupling which leads to large charge-to-spin
conversion efficiency and novel transport behaviors. In this work, we have
observed a bilinear magnetoelectric resistance (BMER) of up to 0.1 nm2A-1Oe-1
in a singlelayer o... | 2305.10720v2 |
2023-09-12 | In operando cryo-STEM of pulse-induced charge density wave switching in TaS$_2$ | The charge density wave (CDW) material 1T-TaS$_2$ exhibits a pulse-induced
insulator-to-metal transition, which shows promise for next-generation
electronics such as memristive memory and neuromorphic hardware. However, the
rational design of TaS$_2$ devices is hindered by a poor understanding of the
switching mechanis... | 2309.06406v1 |
2024-05-15 | Laser Printing of Silver and Silver Oxide | We show that direct laser writing (DLW) in aqueous silver nitrate with a 1030
nm femtosecond (fs) laser results in deposition of a mixture of silver oxide
and silver, in contrast to the pure silver deposition previously reported with
780 nm fs DLW. However, adding photoinitiator prevents silver oxide formation
in a con... | 2405.09340v1 |
2022-03-15 | High Rate and High Precision Timing and Calorimeter Detectors | High precision timing, high rate calorimeters, and radiation resistance are
becoming an important issue in particle physics especially in Energy and
Intensity Frontiers. We discuss doped Zinc Oxide (ZnO:Ga or GZO; ZnO:X where X
is Al, Cu or others) as a very fast scintillator and wavelength shifter (WLS),
Total interna... | 2203.09942v1 |
1998-01-20 | QHE, magnetoresistance and disordered transport on 2D mesoscopic plaquettes | The transport properties of a rectangular mesoscopic plaquette in the
presence of a perpendicular magnetic field are studied in a tight-binding model
with randomly distributed traps. The longitudinal and Hall resistances are
calculted in the four-probe Landauer-B\"{u}ttiker formalism which accounts
automatically both f... | 9801192v1 |
1998-07-16 | Low temperature resistivity in a nearly half-metallic ferromagnet | We consider electron transport in a nearly half-metallic ferromagnet, in
which the minority spin electrons close to the band edge at the Fermi energy
are Anderson-localized due to disorder. For the case of spin-flip scattering of
the conduction electrons due to the absorption and emission of magnons, the
Boltzmann equa... | 9807244v1 |
1998-11-26 | Kinetics of electric field induced oxygen ion migration in epitaxial metallic oxide films | In this paper we report the observation of curent induced change of
resistance of thin metallic oxide films. The resistance changes at a very low
current (current density $J \geq 10^{3}$ A/cm$^{2}$). We find that the time
dependence associated with the processes (increase of resistance) show a
streched exponential type... | 9811377v1 |
1999-09-14 | Anomalous temperature behavior of resistivity in lightly doped manganites around a metal-insulator phase transition | An unusual temperature and concentration behavior of resistivity in
$La_{0.7}Ca_{0.3}Mn_{1-x}Cu_xO_3$ has been observed at slight $Cu$ doping
($0\leq x \leq 0.05$). Namely, introduction of copper results in a splitting of
the resistivity maximum around a metal-insulator transition temperature
$T_0(x)$ into two differen... | 9909196v1 |
1999-11-25 | Anomaly of AC resistance in magnetic nanoparticle alloys at spin-glass-like transition | (withdrawn) A combined study of magnetic susceptibility and AC resistance was
performed on melt-spun Cu-Co granular magnetic ribbons. The AC resistance as a
function of temperature has a sharp maximum. We associate it with a diverging
correlation length at the temperature of collective freezing of magnetic
moments via ... | 9911414v2 |
1999-12-14 | Giant AC magnetoresistance and anisotropic AC magnetoresistance in granular magnetic alloys | (withdrawn)AC resistance of melt-spun granular magnetic Cu85Co15 ribbons was
measured as a function of temperature in the range 5-300 K, magnetic field Hdc
in the range -60 kOe to 60 kOe, and frequency in the range 1-1000 Hz. A sharp
peak of zero-field resistance, which scales with frequency, and an associated
isotropi... | 9912259v2 |
2000-07-31 | Electrical transport properties of bulk Ni$_{c}$Fe$_{1-c}$ alloys and related spin-valve systems | Within the Kubo-Greenwood formalism we use the fully relativistic,
spin-polarized, screened Korringa-Kohn-Rostoker method together with the
coherent-potential approximation for layered systems to calculate the
resistivity for the permalloy series Ni$_{c}$Fe$_{1-c}$. We are able to
reproduce the variation of the resisti... | 0007507v1 |
2001-10-19 | Transport, magnetic, thermodynamic and optical properties in Ti-doped Sr_2RuO_4 | We report on electrical resistivity, magnetic susceptibility and
magnetization, on heat capacity and optical experiments in single crystals of
Sr_2Ru_(1-x)Ti_xO_4. Samples with x=0.1 and 0.2 reveal purely semiconducting
resistivity behavior along c and the charge transport is close to localization
within the ab-plane. ... | 0110412v1 |
2002-01-10 | Linear and nonlinear regime of a Random Resistor Network under biased percolation | We investigate the steady state of a two-dimensional random resistor network
subjected to two competing biased percolations as a function of the bias
strength. The properties of the linear and nonlinear regimes are studied by
means of Monte Carlo simulations. In constant current conditions, a scaling
relation is found ... | 0201152v1 |
2002-04-11 | In-plane Anisotropy on Resistivity and Thermopower in The Misfit Layered Oxide Bi2-xPbxSr2Co2Oy | We investigated the in-plane anisotropy on the resistivity and thermopower of
Bi2-xPbxSr2Co2Oy single crystals, which have a misfit structure between the
hexagonal CoO2 layer and the rock salt Bi2Sr2O4 layer. The resistivity and
thermopower show significantly large anisotropy, which exceeds two at maximum.
This anisotr... | 0204245v1 |
2002-05-23 | Nonlinear AC resistivity in s-wave and d-wave disordered granular superconductors | We model s-wave and d-wave disordered granular superconductors with a
three-dimensional lattice of randomly distributed Josephson junctions with
finite self-inductance. The nonlinear ac resistivity of these systems was
calculated using Langevin dynamical equations. The current amplitude dependence
of the nonlinear resi... | 0205475v1 |
2002-12-06 | Ab initio and finite-temperature molecular dynamics studies of lattice resistance in tantalum | This manuscript explores the apparent discrepancy between experimental data
and theoretical calculations of the lattice resistance of bcc tantalum. We
present the first results for the temperature dependence of the Peierls stress
in this system and the first ab initio calculation of the zero-temperature
Peierls stress ... | 0212156v2 |
2003-02-21 | Spin-Glass-like Transition and Hall Resistivity of Y2-xBixIr2O7 | Various physical properties of the pyrochlore oxide Y2-xBixIr2O7 have been
studied. The magnetizations M measured under the conditions of the
zero-field-cooling(ZFC) and the field-cooling(FC) have different values below
the temperature T=TG. The anomalous T-dependence of the electrical
resistivities r and the thermoele... | 0302437v1 |
2003-04-11 | X-ray-induced electrical conduction in the insulating phase of thiospinel CuIr2S4 | Effects of x-ray irradiation on the crystal structure and the electrical
resistance were examined at low temperatures for the insulating phase of spinel
compound CuIr2S4. We found that the resistance decreases by more than five
decades by irradiation at 8.5 K. The structural change from triclinic to
tetragonal was obse... | 0304256v1 |
2003-04-18 | Magnetoresistance and percolation in the LaNi(1-x)Co(x)O3 solid solution | A detailed study of the zero-field electrical resistivity and
magnetoresistance for the metallic members of the LaNi_{1-x}Co{x}O3 solid
solution with 0.3<=x<=0.6 is reported. The low temperature resistivity of the
compounds with 0.3<=x<=0.5 exhibits a logarithmic dependence that is
characteristic of systems with spin f... | 0304423v2 |
2003-08-27 | Room temperature domain wall pinning in bent ferromagnetic nanowires | Mechanically bent nickel nanowires show clear features in their room
temperature magnetoresistance when a domain wall is pinned at the location of
the bend. By varying the direction of an applied magnetic field, the wire can
be prepared either in a single-domain state or a two-domain state. The presence
or absence of t... | 0308579v1 |
2003-11-27 | Fabrication and Electrical Properties of Pure VO2 Phase Films | We have grown VO2 thin films by laser ablation for electronic device
applications. In obtaining the thin films of the pure VO2 phase, oxygen partial
pressure is a critical parameter because vanadium oxides have several phases
with the oxygen concentration. It is found that the pure VO2 films are
epitaxially grown on Al... | 0311616v2 |
2004-01-20 | Non-Gaussian Resistance Noise near Electrical Breakdown in Granular Materials | The distribution of resistance fluctuations of conducting thin films with
granular structure near electrical breakdown is studied by numerical
simulations. The film is modeled as a resistor network in a steady state
determined by the competition between two biased processes, breaking and
recovery. Systems of different ... | 0401352v1 |
2004-07-23 | Thermal and Electrical Properties of gamma-NaxCoO2 (0.70 < x < 0.78) | We have performed specific heat and electric resistivity measurements of
Na$_{x}$CoO$_{2}$ ($x=0.70$-0.78). Two anomalies have been observed in the
specific heat data for $x=0.78$, corresponding to magnetic transitions at
$T_{c}=22$ K and $T_{k}\simeq 9$ K reported previously. In the electrical
resistivity, a steep dec... | 0407614v1 |
2004-09-24 | Hysteretic current-voltage characteristics and resistance switching at a rectifying Ti/Pr$_{0.7}$Ca$_{0.3}$MnO$_{3}$ interface | We have characterized the vertical transport properties of epitaxial layered
structures composed of Pr$_{0.7}$Ca$_{0.3}$MnO$_{3}$ (PCMO) sandwiched between
SrRuO$_{3}$ (SRO) bottom electrode and several kinds of top electrodes such as
SRO, Pt, Au, Ag, and Ti. Among the layered structures, Ti/PCMO/SRO is distinct
due to... | 0409657v1 |
2004-12-27 | Depinning at the initial stage of the resistive transition in superconductors with a fractal cluster structure | Depinning of vortices in percolative superconductor containing fractal
clusters of a normal phase is considered. Transition of the superconductor into
a resistive state corresponds to the percolation transition from a pinned
vortex state to a resistive state when the vortices are free to move. The
motion of the magneti... | 0412702v1 |
2005-04-20 | Resistive relaxation in field-induced insulator-metal transition of a (La$_{0.4}$Pr$_{0.6}$)$_{1.2}$Sr$_{1.8}$Mn$_{2}$O$_{7}$ bilayer manganite single crystal | We have investigated the resistive relaxation of a
(La$_{0.4}$Pr$_{0.6}$)$_{1.2}$Sr$_{1.8}$Mn$_{2}$O$_{7}$ single crystal, in
order to examine the slow dynamics of the field-induced insulator to metal
transition of bilayered manganites. The temporal profiles observed in remanent
resistance follow a stretched exponentia... | 0504500v1 |
2005-05-19 | Comparison of Measured and Calculated Specific Resistances of Pd/Pt Interfaces | We compare specific resistances (AR equals area A times resistance R) of
sputtered Pd/Pt interfaces measured in two different ways with
no-free-parameter calculations. One way gives 2AR(Pd/Pt) of 0.29 (0.03)
fohm-m(2) and the other 0.17 (0.13) fohm-m(2). From these we derive a best
estimate of 2AR(Pd/Pt) of 0.28 (0.06)... | 0505488v2 |
2006-01-19 | Spatially extended nature of resistive switching in perovskite oxide thin films | We report the direct observation of the electric pulse induced
resistance-change (EPIR) effect at the nano scale on La1-xSrxMnO3 (LSMO) thin
films by the current measurement AFM technique. After a switching voltage of
one polarity is applied across the sample by the AFM tip, the conductivity in a
local nanometer region... | 0601451v1 |
2006-09-11 | Imaging of Microscopic Sources of Resistive and Reactive Nonlinearities in Superconducting Microwave Devices | The technique of low-temperature Laser Scanning Microscopy (LSM) has been
applied to the investigation of local microwave properties in operating
YBa2Cu3O7/LaAlO3 thin-film resonators patterned into a meandering strip
transmission line. By using a modified newly developed procedure of
spatially-resolved complex impedan... | 0609244v1 |
2006-09-24 | Swift-heavy-ion-irradiation-induced enhancement in electrical conductivity of chemical solution deposited La0.7Ba0.3MnO3 thin films | Epitaxial thin films of La0.7Ba0.3MnO3 manganite, deposited using Chemical
Solution Deposition technique, were irradiated by 200 MeV Ag+15 ions with a
maximum ion dose up to 1x10^12 ions/cm2. Temperature- and magnetic
field-dependent resistivity measurements on all the films (before and after
irradiation) reveal a sust... | 0609613v1 |
2006-10-06 | Resistive hystersis effects in perovskite oxide-based heterostructure junctions | In this paper, we report the electrical and structural properties of the
oxide-based metal/ferroelectric/metal (MFM) junctions. The heterostructures are
composed of ultrathin layers of La0.7Ca0.3MnO3 (LCMO) as a metallic layer and,
BaTiO3 (BTO) as a ferroelectric layer. Junction based devices, having the
dimensions of ... | 0610172v1 |
2007-02-26 | Dielectrophoretically Assembled Polymer Nanowires for Gas Sensing | We measured the electronic properties and gas sensing response of nanowires
containing segments of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate)
(PEDOT/PSS) that were synthesized using anodic aluminum oxide (AAO) membranes.
The nanowires have a "striped" structure of gold-PEDOT/PSS-gold and are
typically 8 um... | 0702619v1 |
2007-03-23 | On the Kondo problem and thermodynamics of dilute magnetic alloys | An argument is given showing that Coulomb attraction between conduction
electrons and impurity ions in a dilute magnetic alloy (DMA) can be
disregarded, provided the system's inverse temperature beta is replaced by an
effective inverse temperature t < beta. This replacement allows to remove the
singularity in Kondo's e... | 0703617v1 |
2007-05-14 | Scaling analysis of the magnetoresistance in Ga_{1-x}Mn_xAs | We compare experimental resistivity data on Ga_{1-x}Mn_xAs films with
theoretical calculations using a scaling theory for strongly disordered
ferromagnets. All characteristic features of the temperature dependence of the
resistivity can be quantitatively understood through this approach as
originating from the close vi... | 0705.2016v2 |
2007-06-07 | Meta-nematic transitions in a bilayer system: Application to the bilayer ruthenate | It was suggested that the two consecutive metamagnetic transitions and the
large residual resistivity discovered in Sr$_3$Ru$_2$O$_7$ can be understood
via the nematic order and its domains in a single layer system. However, a
recently reported anisotropy between two longitudinal resistivities induced by
tilting the ma... | 0706.1069v3 |
2007-06-12 | Graphene Spin Transistor | Graphitic nanostructures, e.g. carbon nanotubes (CNT) and graphene, have been
proposed as ideal materials for spin conduction[1-7]; they have long electronic
mean free paths[8] and small spin-orbit coupling[9], hence are expected to have
very long spin-scattering times. In addition, spin injection and detection in
grap... | 0706.1597v1 |
2007-08-20 | Negative magnetoresistance of ultra-narrow superconducting nanowires in the resistive state | We present a phenomenological model qualitatively explaining negative
magnetoresistance in quasi-one-dimensional superconducting channels in the
resistive state. The model is based on the assumption that fluctuations of the
order parameter (phase slips) are responsible for the finite effective
resistance of a narrow su... | 0708.2602v2 |
2007-11-23 | Intrinsic and Extrinsic Performance Limits of Graphene Devices on SiO2 | The linear dispersion relation in graphene[1,2] gives rise to a surprising
prediction: the resistivity due to isotropic scatterers (e.g. white-noise
disorder[3] or phonons[4-8]) is independent of carrier density n. Here we show
that acoustic phonon scattering[4-6] is indeed independent of n, and places an
intrinsic lim... | 0711.3646v2 |
2008-02-11 | Anomalous Hall effect in Fe/Cu bilayers | The scaling of anomalous Hall resistivity on the longitudinal resistivity has
been intensively studied in the different magnetic systems, including
multilayers and granular films, to examine which mechanism, skew scattering or
side-jump, dominates. The basis of the scaling law is that both the
resistivities are due to ... | 0802.1462v1 |
2008-04-09 | Theory of a continuous Mott transition in two dimensions | We study theoretically the zero temperature phase transition in two
dimensions from a Fermi liquid to a paramagnetic Mott insulator with a spinon
Fermi surface. We show that the approach to the bandwidth controlled Mott
transition from the metallic side is accompanied by a vanishing quasiparticle
residue and a divergin... | 0804.1555v1 |
2008-04-28 | Lattice Resistance to Dislocation Motion at the Nanoscale | In this letter we propose a model that demonstrates the effect of free
surface on the lattice resistance experienced by a moving dislocation in
nanodimensional systems. This effect manifests in an enhanced velocity of
dislocation due to the proximity of the dislocation line to the surface. To
verify this finding, molec... | 0804.4360v2 |
2008-05-13 | The Role of Electrical and Thermal Contact Resistance for Joule Breakdown of Single-Wall Carbon Nanotubes | Several data sets of electrical breakdown in air of single-wall carbon
nanotubes (SWNTs) on insulating substrates are collected and analyzed. A
universal scaling of the Joule breakdown power with nanotube length is found,
which appears independent of the insulating substrates used or their thickness.
This suggests the ... | 0805.1937v1 |
2008-06-09 | Transport properties and superconductivity in $Ba_{1-x}M_xFe_2As_2$ (M=La and K) with double FeAs layers | We synthesized the samples $Ba_{1-x}M_xFe_2As_2$ (M=La and K) with
$ThCr_2Si_2$-type structure. These samples were systematically characterized by
resistivity, thermoelectic power (TEP) and Hall coefficient ($R_H$).
$BaFe_2As_2$ shows an anomaly in resistivity at about 140 K. Substitution of La
for Ba leads to a shift ... | 0806.1459v1 |
2009-02-21 | Negative nonlocal resistance in mesoscopic gold Hall bars: Absence of giant spin Hall effect | We report the observation of negative nonlocal resistances in multiterminal
mesoscopic gold Hall bar structures whose characteristic dimensions are larger
than the electron mean-free path. Our results can only be partially explained
by a classical diffusive model of the nonlocal transport, and are not
consistent with a... | 0902.3686v1 |
2009-08-26 | Piezoresistance in chemically synthesized polypyrrole thin films | The resistance of chemically synthesized polypyrrole (PPy) thin films is
investigated as a function of the pressure of various gases as well as of the
film thickness. A physical, piezoresistive response is found to coexist with a
chemical response if the gas is chemically active, like, e.g., oxygen. The
piezoresistance... | 0908.3840v1 |
2009-09-28 | The effects of superconductor-stabilizer interfacial resistance on quench of current-carrying coated conductor | We present the results of numerical analysis of a model of normal zone
propagation in coated conductors. The main emphasis is on the effects of
increased contact resistance between the superconducting film and the
stabilizer on the speed of normal zone propagation, the maximum temperature
rise inside the normal zone, a... | 0909.5209v1 |
2009-11-02 | Giant anomalous Hall resistivity of the room temperature ferromagnet Fe3Sn2 - a frustrated metal with the kagome-bilayer structure | We have investigated magnetic and transport properties of the {\it
kagom\'{e}-bilayer} ferromagnet Fe$_{3}$Sn$_{2}$. A soft ferromagnetism and a
large anomalous Hall effect are observed. The saturated Hall resistivity of
Fe$_{3}$Sn$_{2}$ is 3.2 $\mu\Omega$cm at 300 K, which is almost 20 times higher
than that of typica... | 0911.0289v1 |
2010-04-19 | Towards a Quantitative Description of Solid Electrolyte Conductance Switches | We present a quantitative analysis of the steady state electronic transport
in a resistive switching device. The device is composed of a thin film of
Ag$_{2}$S (solid electrolyte) contacted by a Pt nano-contact acting as
ion-blocking electrode, and a large area Ag reference electrode. When applying
a bias voltage both ... | 1004.3079v1 |
2010-05-18 | A general figure of merit for thick and thin transparent conductive carbon nanotube coatings | We suggest a wavelength-dependent figure of merit for transparent conducting
nanotube networks, composed of the sheet resistance and the optical density. We
argue that this would be more useful than other suggestions prevailing in the
literature, because it relies on more realistic assumptions regarding the
optical par... | 1005.3125v1 |
2010-05-30 | On the Corrosion Resistance of Porous Electroplated Zinc Coatings in Different Corrosive Media | The corrosion resistance of an electroplated (EP) Zn coating whose surface
was chemically etched to produce surface defects (pores) is investigated in
this work. Impedance and DC polarisation measururements were employed to study
the behaviour of such coating in various corrosive media (NaCl, NaOH and rain
water). Four... | 1005.5554v1 |
2010-06-12 | Ex-situ Tunnel Junction Process Technique Characterized by Coulomb Blockade Thermometry | We investigate a wafer scale tunnel junction fabrication method, where a
plasma etched via through a dielectric layer covering bottom Al electrode
defines the tunnel junction area. The ex-situ tunnel barrier is formed by
oxidation of the bottom electrode in the junction area. Room temperature
resistance mapping over a ... | 1006.2436v1 |
2010-08-24 | Magnetism of mixed quaternary Heusler alloys: (Ni,T)$_{2}$MnSn (T=Cu,Pd) as a case study | The electronic properties, exchange interactions, finite-temperature
magnetism, and transport properties of random quaternary Heusler Ni$_{2}$MnSn
alloys doped with Cu- and Pd-atoms are studied theoretically by means of {\it
ab initio} calculations over the entire range of dopant concentrations. While
the magnetic mome... | 1008.4060v1 |
2010-10-29 | Nd induced Mn spin-reorientation transition in NdMnAsO | A combination of synchrotron X-ray, neutron powder diffraction,
magnetization, heat capacity and electrical resistivity measurements reveals
that NdMnAsO is an antiferromagnetic semiconductor with large Neel temperature
(TN = 359(2) K). At room temperature the magnetic propagation vector k = 0 and
the Mn moments are di... | 1010.6145v1 |
2010-11-04 | Electron interaction-driven insulating ground state in Bi2Se3 topological insulators in the two dimensional limit | We report a transport study of ultrathin Bi2Se3 topological insulators with
thickness from one quintuple layer to six quintuple layers grown by molecular
beam epitaxy. At low temperatures, the film resistance increases
logarithmically with decreasing temperature, revealing an insulating ground
state. The sharp increase... | 1011.1055v1 |
2011-02-03 | Temperature dependent resistivity in bilayer graphene due to flexural phonons | We have studied electron scattering by out-of-plane (flexural) phonons in
doped suspended bilayer graphene. We have found the bilayer membrane to follow
the qualitative behavior of the monolayer cousin. In the bilayer, different
electronic structure combine with different electron-phonon coupling to give
the same param... | 1102.0807v1 |
2011-05-19 | Anisotropic in-plane resistivity in the nematic phase of the iron pnictides | We show that the interference between scattering by impurities and by
critical spin fluctuations gives rise to anisotropic transport in the
Ising-nematic state of the iron pnictides. The effect is closely related to the
non-Fermi liquid behavior of the resistivity near an antiferromagnetic quantum
critical point. Our t... | 1105.3906v2 |
2011-08-17 | Control of rectifying and resistive switching behavior in BiFeO3 thin films | BiFeO3 thin films have been grown on Pt/Ti/SiO2/Si substrates with pulsed
laser deposition using Au as the top electrode. The resistive switching
property of the Au/BiFeO3/Pt stack has been significantly improved by carefully
tuning the oxygen pressure during the growth, and a large switching ratio of
~4500 has been ac... | 1108.3454v1 |
2011-09-05 | The direct relation between the coefficient of the low temperature resistivity T^2 term and the superconducting transition temperature Tc | In several superconductors above the superconducting transition temperature
Tc, the electrical resistivity is of the form {\rho} =AT^2. We show that there
exists an empirical relation between Tc and A when both vary with an external
parameter, e.g. pressure. The more resistive the sample the higher the Tc.
Landau theor... | 1109.0853v1 |
2011-10-17 | In Situ Imaging of the Conducting Filament in a Silicon Oxide Resistive Switch | The nature of the conducting filaments in many resistive switching systems
has been elusive. Through in situ transmission electron microscopy, we image
the real-time formation and evolution of the filament in a silicon oxide
resistive switch. The electroforming process is revealed to involve the local
enrichment of sil... | 1110.3755v1 |
2011-12-02 | Wigner-Mott scaling of transport near the two-dimensional metal-insulator transition | Electron-electron scattering usually dominates the transport in strongly
correlated materials. It typically leads to pronounced resistivity maxima in
the incoherent regime around the coherence temperature $T^{*}$, reflecting the
tendency of carriers to undergo Mott localization following the demise of the
Fermi liquid.... | 1112.0440v2 |
2012-02-15 | Non-linear resistivity and heat dissipation in monolayer graphene | We have experimentally studied the nonlinear nature of electrical conduction
in monolayer graphene devices on silica substrates. This nonlinearity manifests
itself as a nonmonotonic dependence of the differential resistance on applied
DC voltage bias across the sample. At temperatures below ~70K, the differential
resis... | 1202.3394v1 |
2012-04-19 | Observation of Negative Contact Resistances in Graphene Field-Effect Transistors | The gate-voltage (VG) dependence of the contact resistance (RC) in graphene
field-effect transistors is characterized by the transmission line model. The
RC-VG characteristics of Ag, Cu, and Au contacts display a dip around the
charge neutrality point, and become even negative with Ag contacts. The dip
structure is wel... | 1204.4315v2 |
2012-05-24 | Intrinsic Electron-Phonon Resistivity in Bi2Se3 in the Topological Regime | We measure the temperature-dependent carrier density and resistivity of the
topological surface state of thin exfoliated Bi2Se3 in the absence of bulk
conduction. When the gate-tuned chemical potential is near or below the Dirac
point the carrier density is strongly temperature dependent reflecting thermal
activation f... | 1205.5554v2 |
2012-07-21 | Simulation of magnetoresistance in disordered ultracold atomic Bose gases | Anderson localization was first investigated in the context of electrons in
solids. One of the successes was in explaining the puzzle of negative
magneto-resistance - as early as the 1940s it had been observed that electron
diffusion rates in some materials can increase with the application of a
magnetic field. Anderso... | 1207.5095v1 |
2012-07-26 | Spin-orbit-coupling induced domain-wall resistance in diffusive ferromagnets | We investigate diffusive transport through a number of domain wall (DW)
profiles of the important magnetic alloy Permalloy taking into account
simultaneously noncollinearity, alloy disorder, and spin-orbit coupling fully
quantum mechanically, from first principles. In addition to observing the known
effects of magnetiz... | 1207.6277v2 |
2012-08-01 | Textured Superconductivity in the Presence of a Coexisting Order: Ce115s and Other Heavy-Fermion Compounds | Superconductivity in strongly correlated electron systems frequently emerges
in proximity to another broken symmetry. In heavy-electron superconductors, the
nearby ordered state most commonly is magnetism, and the so-called Ce115
heavy-electron compounds have been particularly instructive for revealing new
relationship... | 1208.0253v1 |
2012-09-20 | Surface resistance measurements of HTS thin films using SLAO dielectric resonator | Surface resistance of HTS films is typically measured using Sapphire
dielectric rod resonators enclosed in a copper cavity. In this paper we present
surface resistance measurements of YBa2Cu3O7-{\delta} films using Strontium
Lanthanum Aluminate (SLAO) at a resonant frequency of 18.2 GHz. We have
performed the error ana... | 1209.4519v1 |
2012-12-04 | UV/Ozone treatment to reduce metal-graphene contact resistance | We report reduced contact resistance of single-layer graphene devices by
using ultraviolet ozone (UVO) treatment to modify the metal/graphene contact
interface. The devices were fabricated from mechanically transferred, chemical
vapor deposition (CVD) grown, single layer graphene. UVO treatment of graphene
in the conta... | 1212.0838v1 |
2013-03-25 | Kinetics of excitations on the Fermi arcs in underdoped cuprates at low temperature | The Fermi-liquid-like (FL) resistivity recently observed in clean HgBa2CuO4
below the pseudogap temperature was related to carriers at the nodal points on
the Fermi surface [4]. We show that this necessitates important implications
for the electronic spectrum of underdoped (UD) cuprates in whole. Photoemission
experime... | 1303.6252v2 |
2013-03-27 | First-Principles Calculation of Thermal Transport in the Metal/Graphene System | Thermal properties in the metal/graphene (Gr) systems are analyzed by using
an atomistic phonon transport model based on Landauer formalism and
first-principles calculations. The specific structures under investigation
include chemisorbed Ni(111)/Gr, physisorbed Cu(111)/Gr and Au(111)/Gr, as well
as Pd(111)/Gr with int... | 1303.6936v1 |
2013-05-22 | Electron Transport Through Ag-Silicene-Ag Junctions | For several years the electronic structure properties of the novel
two-dimensional system silicene have been studied extensively. Electron
transport across metal-silicence junctions, however, remains relatively
unexplored. To address this issue, we developed and implemented a theoretical
framework that utilizes the tig... | 1305.5285v1 |
2013-06-13 | Investigation of the quaternary Fe2-xCoxMnSi alloys by structural, magnetic, resistivity and spin polarization measurements | Effects of the Co substitution have been observed on the structural, magnetic
and magneto-transport properties of Fe2-xCoxMnSi alloy. Curie temperature (TC)
and saturation magnetization (MS) of these alloys increased linearly with the
Co substitution. Competitive magnetic interaction between ferromagnetic (FM)
and anti... | 1306.3086v3 |
2013-06-21 | Carrier density modulation in graphene underneath Ni electrode | We investigate the transport properties of graphene underneath metal to
reveal whether the carrier density in graphene underneath source/drain
electrodes in graphene field-effect transistors is fixed. The resistance of the
graphene/Ni double-layered structure has shown a graphene-like back-gate bias
dependence. In othe... | 1306.5086v1 |
2013-07-29 | Molecular Doping of Multilayer MoS2 Field-effect Transistors: Reduction in Sheet and Contact Resistances | For the first time, polyethyleneimine (PEI) doping on multilayer MoS2
field-effect transistors are investigated. A 2.6 times reduction in sheet
resistance, and 1.2 times reduction in contact resistance have been achieved.
The enhanced electrical characteristics are also reflected in a 70% improvement
in ON current, and... | 1307.7643v2 |
2013-09-15 | Large lattice distortions associated with the magnetic transition in La0.7Sr0.3MnO3 | Colossal magnetoresistance (CMR) is associated with the phase transition from
a metallic ferromagnetic to insulating paramagnetic phase, which can be
controlled by an applied magnetic field. The insulating phase occurs due to
trapping of the charge carriers by polaronic lattice distortions, which raise
the resistivity.... | 1309.3747v1 |
2013-09-20 | Surface-resistance measurements using superconducting stripline resonators | We present a method to measure the absolute surface resistance of conductive
samples at a set of GHz frequencies with superconducting lead stripline
resonators at temperatures 1- 6K. The stripline structure can easily be applied
for bulk samples and allows direct calculation of the surface resistance
without the requir... | 1309.5331v2 |
2013-10-17 | The Influence of Ca and Y on the Microstructure and Corrosion Resistance of Vacuum Die Casting AZ91 Alloy | The influence of Ca and Y on the microstructure and corrosion resistance of
vacuum die casting AZ91 alloy is investigated using optical microscope,
electron scanning microscope, weight-loss test and electrochemical corrosion
test. The results indicate that the microstructure of AZ91 alloy can be
refined, amount of Mg17... | 1310.4671v1 |
2013-11-05 | Effect of disorder on the resistivity anisotropy near the electronic nematic phase transition in pure and electron-doped BaFe$_2$As$_2$ | We show that the strain-induced resistivity anisotropy in the tetragonal
state of the representative underdoped Fe-arsenides BaFe$_2$As$_2$,
Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$ and Ba(Fe$_{1-x}$Ni$_x$)$_2$As$_2$ is
independent of disorder over a wide range of defect and impurity
concentrations. This result demonstrates that... | 1311.0933v2 |
2013-11-14 | Mechanically Modulated Tunneling Resistance in Monolayer MoS2 | We report on the modulation of tunneling resistance in MoS2 monolayers by
nano-indentation using an atomic force microscope (AFM). The resistance between
the conductive AFM tip and the bottom electrode separated by a monolayer MoS2
is reversibly reduced by up to 4 orders of magnitude, which is attributed to
enhanced qu... | 1311.3608v1 |
2014-03-21 | MoS2 Field-effect Transistors with Graphene/Metal Heterocontacts | For the first time, n-type few-layer MoS2 field-effect transistors with
graphene/Ti as the hetero-contacts have been fabricated, showing more than 160
mA/mm drain current at 1 {\mu}m gate length with an on-off current ratio of
107. The enhanced electrical characteristic is confirmed in a nearly 2.1 times
improvement in... | 1403.5485v2 |
2014-07-09 | Thermal transport properties of metal/MoS2 interfaces from first principles | Thermal transport properties at the metal/MoS2 interfaces are analyzed by
using an atomistic phonon transport model based on the Landauer formalism and
first-principles calculations. The considered structures include chemisorbed
Sc(0001)/MoS2 and Ru(0001)/MoS2, physisorbed Au(111)/MoS2, as well as
Pd(111)/MoS2 with int... | 1407.2335v1 |
2014-10-30 | Highly resistive epitaxial Mg-doped GdN thin films | We report the growth by molecular beam epitaxy of highly resistive GdN, using
intentional doping with magnesium. Mg-doped GdN layers with resistivities of
1000 {\Omega}.cm and carrier concentrations of 10E16 cm-3 are obtained for
films with Mg concentrations up to 5 x 10E19 atoms/cm3. X-ray diffraction
rocking curves i... | 1410.8228v1 |
2014-11-12 | Probing a spin-glass state in SrRuO3 thin films through higher-order statistics of resistance fluctuations | The complex perovskite oxide SrRuO3 shows intriguing transport properties at
low temperatures due to the interplay of spin, charge, and orbital degrees of
freedom. One of the open questions in this system is regarding the origin and
nature of the low-temperature glassy state. In this paper we report on
measurements of ... | 1411.3101v1 |
2014-12-02 | On the field dependent surface resistance of niobium on copper cavities | The surface resistance Rs of superconducting cavities prepared by sputter
coating a thin niobium film on a copper substrate increases significantly
stronger with the applied RF field compared to cavities of bulk material. A
possible cause is that due to the thermal boundary resistance between the
copper substrate and t... | 1412.0892v1 |
2015-01-20 | Generation and detection of pure valley current by electrically induced Berry curvature in bilayer graphene | Valley is a useful degree of freedom for non-dissipative electronics since
valley current that can flow even in an insulating material does not accompany
electronic current. We use dual-gated bilayer graphene in the Hall bar geometry
to electrically control broken inversion symmetry or Berry curvature as well as
the ca... | 1501.04776v1 |
2015-02-24 | Unidirectional spin Hall magnetoresistance in ferromagnet/normal metal bilayers | Magnetoresistive effects are usually invariant upon inversion of the
magnetization direction. In noncentrosymmetric conductors, however, nonlinear
resistive terms can give rise to a current dependence that is quadratic in the
applied voltage and linear in the magnetization. Here we demonstrate that such
conditions are ... | 1502.06898v2 |
2015-08-17 | Emergence of non-Fermi liquid behaviors in 5d perovskite SrIrO3 thin films: interplay between correlation, disorder, and spin-orbit coupling | We investigate the effects of compressive strain on the electrical
resistivity of 5d iridium based perovskite SrIrO3 by depositing epitaxial films
of thickness 35 nm on various substrates such as GdScO3 (110), DyScO3 (110),
and SrTiO3 (001). Surprisingly, we find anomalous transport behaviors in the
tempeature dependen... | 1508.03944v1 |
2015-08-31 | Scalable T^2 resistivity in a small single-component Fermi surface | Scattering among electrons generates a distinct contribution to electrical
resistivity that follows a quadratic temperature dependence. In
strongly-correlated electron systems, the prefactor A of this T$^2$ resistivity
scales with the magnitude of the electronic specific heat. Here, we show that
one can change the magn... | 1508.07812v1 |
2015-08-31 | In-Line-Test of Variability and Bit-Error-Rate of HfOx-Based Resistive Memory | Spatial and temporal variability of HfOx-based resistive random access memory
(RRAM) are investigated for manufacturing and product designs. Manufacturing
variability is characterized at different levels including lots, wafers, and
chips. Bit-error-rate (BER) is proposed as a holistic parameter for the write
cycle resi... | 1509.00070v1 |
2015-11-30 | Solidification and loss of hydrostaticity in liquid media used for pressure measurements | We carried out a study of the pressure dependence of the solidification
temperature in nine pressure transmitting media that are liquid at ambient
temperature, under pressures up to 2.3 GPa. These fluids are: 1:1
isopentane/n-pentane, 4:6 light mineral oil/n-pentane, 1:1 isoamyl
alcohol/n-pentane, 4:1 methanol/ethanol,... | 1512.00087v1 |
2015-12-18 | The effect of quenching from different temperatures on Bi 0.88 Sb 0.12 alloy | Structural, thermal, resistive and magnetic properties of melt quenched Bi
0.88 Sb 0.12 alloys are reported. The samples are heated at three different
temperatures, followed by rapid quenching in liquid nitrogen. Large temperature
difference between liquidus and solidus lines, led to microscopic
in-homogeneity in the a... | 1512.05883v1 |
2015-12-18 | Exchange Bias and Bistable Magneto-Resistance States in Amorphous TbFeCo thin Films | Amorphous TbFeCo thin films sputter deposited at room temperature on
thermally oxidized Si substrate are found to exhibit strong perpendicular
magnetic anisotropy (PMA). Atom probe tomography (APT), scanning transmission
electron microscopy (STEM), and energy dispersive spectroscopy (EDS) mapping
have revealed two nano... | 1512.06103v1 |
2015-12-23 | Topological Critical Point and Resistivity Anomaly in HfTe5 | There is a long-standing confusion concerning the physical origin of the
anomalous resistivity peak in transition metal pentatelluride HfTe5. Several
mechanisms, like the formation of charge density wave or polaron, have been
proposed, but so far no conclusive evidence has been presented. In this work,
we investigate t... | 1512.07360v1 |
2016-01-03 | Detection of DC currents and resistance measurements in longitudinal spin Seebeck effect experiments on Pt/YIG and Pt/NFO | In this work we investigated thin films of the ferrimagnetic insulators YIG
and NFO capped with thin Pt layers in terms of the longitudinal spin Seebeck
effect (LSSE). The electric response detected in the Pt layer under an
out-of-plane temperature gradient can be interpreted as a pure spin current
converted into a cha... | 1601.00304v1 |
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