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Stability of Elastic Glass Phases in Random Field XY Magnets and Vortex
Lattices in Type II Superconductors: A description of a dislocation-free elastic glass phase in terms of domain
walls is developed and used as the basis of a renormalization group analysis of
the energetics of dislocation loops added to the syste... | cond-mat_supr-con |
Signatures of Stripe Phases in Hole Doped $La_2NiO_4$: We study nickelate-centered and oxygen-centered stripe phases in doped
La$_{2}$NiO$_{4}$ materials. We use an inhomogeneous Hartree-Fock and
random-phase approximation approach including both electron-electron and
electron-lattice(e-l) coupling for a layer of La$_{... | cond-mat_supr-con |
Effects of Disorder in Mg_{1-x}Ta_{x}B_2 Alloys using Coherent-Potential
Approximation: Using Korringa-Kohn-Rostoker coherent-potential approximation in the
atomic-sphere approximation (KKR-ASA CPA) method for taking into account the
effects of disorder, Gaspari-Gyorffy formalism for calculating the
electron-phonon c... | cond-mat_supr-con |
Nanoscale ferromagnet-superconductor-ferromagnet switches controlled by
magnetization orientation: We study clean ferromagnet-superconductor-ferromagnet (FSF) nanostructures in
which the magnetization of the F layers can be parallel (P) or antiparallel
(AP). We consider the case where the thickness of the S layer is ... | cond-mat_supr-con |
Pseudogap Phenomena and Phase Diagram in the 2-Band Hubbard Model: High-Tc superconducting materials (HTSC) have anomalous properties such as
the pseudo-gap or spin-gap etc., in Hall coefficient, 1/T1T and the density of
states etc. First including effects of strong on-site repulsion between
d-electrons at Cu-sites, we... | cond-mat_supr-con |
Phonon linewidth due to electron-phonon interactions with strong forward
scattering in FeSe thin films on oxide substrates: The discovery of an enhanced superconducting transition temperature $T_c$ in
monolayers of FeSe grown on several oxide substrates has opened a new route to
high-$T_c$ superconductivity through i... | cond-mat_supr-con |
Lattice dynamics of the cluster chain compounds M2Mo6Se6: The lattice dynamics of members of the M2Mo6Se6 family of materials with
guest ions M = K, Rb, Cs, In, and Tl has been studied using inelastic x-ray
scattering and Raman spectroscopy at room temperature, as well as by ab-initio
calculations. We find a good match... | cond-mat_supr-con |
Multipole superconductivity in nonsymmorphic Sr$_2$IrO$_4$: Discoveries of marked similarities to high-$T_{\text{c}}$ cuprate
superconductors point to the realization of superconductivity in the doped
$J_{\text{eff}} = 1 / 2$ Mott insulator Sr$_2$IrO$_4$. Contrary to the mother
compound of cuprate superconductors, seve... | cond-mat_supr-con |
Intertype superconductivity evoked by the interplay of disorder and
multiple bands: Nonmagnetic impurity scattering is known to shift up the Ginzburg-Landau
parameter $\kappa$ of a superconductor. In this case, when the system is
initially in type I, it can change its magnetic response, crossing the
intertype domain ... | cond-mat_supr-con |
Stochastic resonance in an RF SQUID with shunted ScS junction: Using a point (superconductor-constriction-superconductor, ScS) contact in a
single-Josephson-junction superconducting quantum interference device (RF
SQUID) provides stochastic resonance conditions at any arbitrary small value of
loop inductance and contac... | cond-mat_supr-con |
Preparation of electron-doped La(2-x)CexCuO4 thin films with various Ce
doping by dc magnetron sputtering: A series of c-axis oriented electron-doped high-Tc superconducting
La(2-x)CexCuO4 thin films, from heavily underdoped x=0.06 to heavily overdoped
x=0.19, have been synthesized by dc magnetron sputtering techniqu... | cond-mat_supr-con |
Spontaneous Long-range Vortex-antivortex Pair in the Two-band 2D
Superconductor: The relaxation iterative method is used to minimize Ginzburg-Landau model for
the two-band superconductor with Josephson-coupling. A stable spontaneous
vortex-antivortex pair with long range order has been revealed. Our result
appears du... | cond-mat_supr-con |
Superconductivity with High Upper Critical Field in the Cubic
Centrosymmetric $η$-Carbide Nb$_4$Rh$_2$C$_{1-δ}$: The upper critical field is a fundamental measure of the strength of
superconductivity in a material. It is also a cornerstone for the realization
of superconducting magnet applications. The critical field... | cond-mat_supr-con |
Hidden Pseudogap and Excitation Spectra in a Strongly Coupled Two-Band
Superfluid/Superconductor: We investigate single-particle excitation properties in the normal state of a
two-band superconductor or superfluid throughout the Bardeen-Cooper-Schrieffer
(BCS) to Bose-Einstein-condensation (BEC) crossover, within the... | cond-mat_supr-con |
Visualization of vortex bound states in polarized Fermi gases at
unitarity: We analyse theoretically a single vortex in 3D trapped atomic Fermi gases
with population polarization near a broad Feshbach resonance. Above a critical
polarization the Andreev-like bound states inside the core become occupied for
the majori... | cond-mat_supr-con |
Measurement of the dynamic charge response of materials using
low-energy, momentum-resolved electron energy-loss spectroscopy (M-EELS): One of the most fundamental properties of an interacting electron system is
its frequency- and wave-vector-dependent density response function, $\chi({\bf
q},\omega)$. The imaginary ... | cond-mat_supr-con |
Elastic properties and inter-atomic bonding in new superconductor
KFe2Se2 from first principles calculations: Very recently (November, 2010, PRB, 82, 180520R) the first 122-like ternary
superconductor KxFe2Se2 with enhanced TC ~ 31K has been discovered. This
finding has stimulated much activity in search of related m... | cond-mat_supr-con |
Competition of electron-phonon mediated superconductivity and Stoner
magnetism on a flat band: The effective attractive interaction between electrons, mediated by
electron-phonon coupling, is a well-established mechanism of conventional
superconductivity. In metals exhibiting a Fermi surface, the critical
temperature... | cond-mat_supr-con |
Hollow carbon spheres as an efficient dopant for enhancing critical
current density of MgB2 based tapes: A significant enhancement of Jc and Hirr in MgB2 tapes has been achieved by
the in situ powder-in-tube method utilizing hollow carbon spheres (HCS) as
dopants. At 4.2 K, the transport Jc for the 850C sintered samp... | cond-mat_supr-con |
A tunable rf SQUID manipulated as flux and phase qubit: We report on two different manipulation procedures of a tunable rf SQUID.
First, we operate this system as a flux qubit, where the coherent evolution
between the two flux states is induced by a rapid change of the energy
potential, turning it from a double well in... | cond-mat_supr-con |
NMR Investigation of the Quasi One-dimensional Superconductor
K$_{2}$Cr$_{3}$As$_{3}$: We report $^{75}$As NMR measurements on the new quasi one-dimensional
superconductor K$_{2}$Cr$_{3}$As$_{3}$ ($T_{c} \sim 6.1$~K) [J.\ K.\ Bao et
al., Phys. Rev. X {\bf 5}, 011013 (2015)]. We found evidence for strong
enhancement o... | cond-mat_supr-con |
Effects of Iodine Annealing on Fe1+yTe0.6Se0.4: Effects of iodine annealing to induce bulk superconductivity in
Fe1+yTe0.6Se0.4 have been systematically studied by changing the molar ratio of
iodine to the sample and annealing temperature. The optimal condition to induce
bulk superconductivity with Tc ~14.5 K and self-... | cond-mat_supr-con |
ARPES in the normal state of the cuprates: comparing the marginal Fermi
liquid and spin fluctuation scenarios: We address the issue whether ARPES measurements of the spectral function $A_k
(\omega)$ near the Fermi surface in the normal state of near optimally doped
cuprates can distinguish between the marginal Fermi ... | cond-mat_supr-con |
Effect of damage by 2-MeV He ions on the normal and superconducting
properties of magnesium diboride: We have studied the effect of damage induced by 2-MeV alpha particles on the
critical temperature, Tc, and resistivity of MgB2 thin films. This technique
allows defects to be controllably introduced into MgB2 in smal... | cond-mat_supr-con |
Antiferromagnetic Phases in the Fulde-Ferrell-Larkin-Ovchinnikov State
of CeCoIn_5: The antiferromagnetic (AFM) order in the Fulde-Ferrell-Larkin-Ovchinnikov
(FFLO) superconducting state is analyzed on the basis of a Ginzburg-Landau
theory. To examine the possible AFM-FFLO state in CeCoIn_5, we focus on the
incommens... | cond-mat_supr-con |
Localization-delocalization dichotomy: Inherent spectral properties of
the cuprates: We consider hole pairing in the pseudopgap phase of High T_c cuprates, as
arising from resonant scattering on dynamically deformable molecular units. As
a result, localized and delocalized features coexist in the one-particle
spectra... | cond-mat_supr-con |
On the generation of multipartite entangled states in Josephson
architectures: We propose and analyze a scheme for the generation of multipartite entangled
states in a system of inductively coupled Josephson flux qubits. The qubits
have fixed eigenfrequencies during the whole process in order to minimize
decoherence ... | cond-mat_supr-con |
Picosecond Trajectory of Two-dimensional Vortex Motion in
FeSe$_{0.5}$Te$_{0.5}$ Visualized by Terahertz Second Harmonic Generation: We have investigated the vortex dynamics in a thin film of an iron-based
superconductor FeSe$_{0.5}$Te$_{0.5}$ by observing second-harmonic generation
(SHG) in the THz frequency range. ... | cond-mat_supr-con |
Superconducting properties of SmO1-xFxFeAs wires with Tc = 52 K prepared
by the powder-in-tube method: We demonstrate that Ta sheathed SmO1-xFxFeAs wires were successfully
fabricated by the powder-in-tube (PIT) method for the first time. Structural
analysis by mean of x-ray diffraction shows that the main phase of Sm... | cond-mat_supr-con |
$^{11}B$ NMR and Relaxation in $MgB_2$ Superconductor: $^{11}B$ NMR and nuclear spin-lattice relaxation rate (NSLR) are reported at
7.2 Tesla and 1.4 Tesla in powder samples of the intermetallic compound $MgB_2$
with superconducting transition temperature in zero field $T_c$ = 39.2 K. From
the first order quadrupole pe... | cond-mat_supr-con |
Microscopic evidence for anisotropic multigap superconductivity in the
CsV$_3$Sb$_5$ kagome superconductor: The recently discovered kagome superconductor CsV$_3$Sb$_5$ ($T_c \simeq 2.5$
K) has been found to host charge order as well as a non-trivial band topology,
encompassing multiple Dirac points and probable surfa... | cond-mat_supr-con |
Type-1.5 superconductivity in multicomponent systems: In general a superconducting state breaks multiple symmetries and, therefore,
is characterized by several different coherence lengths $\xi_i$, $i=1,...,N$.
Moreover in multiband material even superconducting states that break only a
single symmetry are nonetheless d... | cond-mat_supr-con |
Structural and electronic response upon hole-doping of rare-earth iron
oxyarsenides Nd1-xSrxFeAsO (0 < x < 0.2): Hole-doping of NdFeAsO via partial replacement of Nd3+ by Sr2+ is a
successful route to obtain superconducting phases (Tc = 13.5 K for a Sr2+
content of 20%); however, the structural and electronic respons... | cond-mat_supr-con |
Growth, Characterization, Vortex Pinning and Vortex Flow Properties of
Single Crystals of Iron Chalcogenide Superconductor FeCr$_{0.02}$Se: We report the growth and characterization of single crystals of iron
chalcogenide superconductor FeCr$_{0.02}$Se. There is an enhancement of the
superconducting transition temper... | cond-mat_supr-con |
Dynamics of metastable vortex states in weakly pinned superconductors: A
phenomenological model: We present a phenomenological model for the vortex dynamics in the peak
effect region of weakly pinned superconductors. We explain the history
dependent dynamic response of the metastable vortex states subjected to a
tran... | cond-mat_supr-con |
Interplay between unconventional superconductivity and heavy-fermion
quantum criticality: CeCu$_2$Si$_2$ versus YbRh$_2$Si$_2$: In this paper the low-temperature properties of two isostructural canonical
heavy-fermion compounds are contrasted with regards to the interplay between
antiferromagnetic (AF) quantum critic... | cond-mat_supr-con |
Josephson Junctions with a synthetic antiferromagnetic interlayer: We report measurements of the critical current vs. Co thickness in
Nb/Cu/Co/Ru/Co/Cu/Nb Josephson junctions, where the inner Co/Ru/Co trilayer is
a "synthetic antiferromagnet" with the magnetizations of the two Co layers
coupled antiparallel to each oth... | cond-mat_supr-con |
Majorana bands, Berry curvature, and thermal Hall conductivity in the
vortex state of a chiral p-wave superconductor: Majorana quasiparticles localized in vortex cores of a chiral p-wave
superconductor hybridize with one another to form bands in a vortex lattice. We
begin by solving a fully microscopic theory describ... | cond-mat_supr-con |
Asymmetrical solutions and role of thermal fluctuations in dc current
driven extended Josephson junction: Extended Josephson junction driven by dc bias current is studied numerically.
Two types of solutions, symmetrical and asymmetrical, are found. The
current-voltage characteristic (IVC) is calculated. The symmetric... | cond-mat_supr-con |
A Unified Description of Cuprate and Iron Arsenide Superconductors: We propose a unified description of cuprate and iron-based superconductivity.
Consistency with magnetic structure inferred from neutron scattering implies
significant constraints on the symmetry of the pairing gap for the iron-based
superconductors. We... | cond-mat_supr-con |
Similarity of slow stripe fluctations between Sr-doped cuprates and
oxygen-doped nickelates: Stripe fluctuations in La2NiO4.17 have been studied by 139La NMR using the
field and temperature dependence of the linewidth and relaxation rates. In the
formation process of the stripes the NMR line intensity is maximal belo... | cond-mat_supr-con |
Doping dependence of heat transport in the iron-arsenide superconductor
Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$: from isotropic to strongly $k$-dependent gap
structure: The temperature and magnetic field dependence of the in-plane thermal
conductivity $\kappa$ of the iron-arsenide superconductor
Ba(Fe$_{1-x}$Co$_x$)$_2$As$_... | cond-mat_supr-con |
Coulomb blockade and Bloch oscillations in superconducting Ti nanowires: Quantum fluctuations in quasi-one-dimensional superconducting channels
leading to spontaneous changes of the phase of the order parameter by $2\pi$,
alternatively called quantum phase slips (QPS), manifest themselves as the
finite resistance well ... | cond-mat_supr-con |
Multiband behavior and non-metallic low-temperature state of
K$_{0.50}$Na$_{0.24}$Fe$_{1.52}$Se$_{2}$: We report evidence for multiband transport and an insulating low-temperature
normal state in superconducting K$_{0.50}$Na$_{0.24}$Fe$_{1.52}$Se$_{2}$ with
$T_{c}\approx 20$ K. The temperature-dependent upper critica... | cond-mat_supr-con |
Switchable resonant coupling of flux qubits: We propose a coupling scheme, where two or more flux qubits with different
eigenfrequencies share Josephson junctions with a coupler loop devoid of its
own quantum dynamics. Switchable two-qubit coupling is realized by tuning the
frequency of the AC magnetic flux through the... | cond-mat_supr-con |
Odd-parity superconductors with two-component order parameters: nematic
and chiral, full gap and Majorana node: Motivated by the recent experiment indicating that superconductivity in the
doped topological insulator Cu$_x$Bi$_2$Se$_3$ has an odd-parity pairing
symmetry with rotational symmetry breaking, we study the ... | cond-mat_supr-con |
Fluctuation conductivity in superconductors in strong electric fields: We study the effect of a strong electric field on the fluctuation
conductivity within the time-dependent Ginzburg-Landau theory for the case of
arbitrary dimension. Our results are based on the analytical derivation of the
velocity distribution law ... | cond-mat_supr-con |
Structure and superconductivity of LiFeAs: The lithium ions in Lithium iron arsenide phases with compositions close to
LiFeAs have been located using powder neutron diffraction. These phases exhibit
superconductivity at temperatures at least as high as 16 K demonstrating that
superconductivity in compounds with [FeAs]-... | cond-mat_supr-con |
Effect of Cu doping on superconductivity in TaSe$_3$: Relationship
between superconductivity and induced charge density wave: By measuring the temperature dependence of the resistance, we investigated
the effect of Cu doping on superconductivity (SC) in Cu-doped TaSe$_3$ in which
the charge density wave (CDW) transit... | cond-mat_supr-con |
What are the elementary excitations of the BCS model in the canonical
ensemble?: We have found the elementary excitations of the exactly solvable BCS model
for a fixed number of particles. These turn out to have a peculiar dispersion
relation, some of them with no counterpart in the Bogoliubov picture, and
unusual co... | cond-mat_supr-con |
Positive Seebeck coefficient in highly doped La$_{2-x}$Sr$_x$CuO$_4$
($x$=0.33); its origin and implication: We present a study of the thermoelectric (Seebeck and Nernst) response in
heavily overdoped, non-superconducting La$_{1.67}$Sr$_{0.33}$CuO$_4$. In spite
of the electron-like curvature of the Fermi surface, the... | cond-mat_supr-con |
Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors: Based on a two-dimensional model of coupled two-leg spin ladders, we derive a
unified picture of recent neutron scattering data of stripe-ordered
La_(15/8)Ba_(1/8)CuO_4, namely of the low-energy magnons around the
superstructure satellites and of ... | cond-mat_supr-con |
Vortex Glass is a Metal: Unified Theory of the Magnetic Field and
Disorder-Tuned Bose Metals: We consider the disordered quantum rotor model in the presence of a magnetic
field. We analyze the transport properties in the vicinity of the multicritical
point between the superconductor, phase glass and paramagnetic phas... | cond-mat_supr-con |
Probability of the resistive state formation caused by absorption of a
single-photon in current-carrying superconducting nano-strips: We have studied supercurrent-assisted formation of the resistive state in
nano-structured Nb and NbN superconducting films after absorption of a single
photon. In amorphous narrow NbN ... | cond-mat_supr-con |
Superconducting topological Dirac semimetals: $P6/m$-Si$_6$ and
$P6/m$-NaSi$_6$: We theoretically propose that hexagonal silicon-based crystals, $P6/m$-Si$_6$
and $P6/m$-NaSi$_6$, are topological Dirac semimetals with superconducting
critical temperatures of 12 K and 13 K, respectively, at ambient pressure. Band
inve... | cond-mat_supr-con |
Quantum decay of the persistent current in a Josephson junction ring: We study the persistent current in a ring consisting of N >> 1 Josephson
junctions threaded by the magnetic flux. When the dynamics of the ring is
dominated by the capacitances of the superconducting islands the system is
equivalent to the xy spin sy... | cond-mat_supr-con |
Pressure-induced Superconductivity and Topological Quantum Phase
Transitions in the Topological Semimetal ZrTe2: Topological transition metal dichalcogenides (TMDCs) have attracted much
attention due to its potential applications in spintronics and quantum
computations. In this work, we systematically investigate the... | cond-mat_supr-con |
Quantum Pairing Time Orders: We propose the concept of the time-independent correlators for the even- and
odd-frequency pairing states that can be defined for both bosonic and fermionic
quasiparticles. These correlators explicitly capture the existence of two
distinct classes of pairing states and provide a direct prob... | cond-mat_supr-con |
Type-1.5 Superconductors: We demonstrate the existence of a novel superconducting state in high quality
two-component MgB2 single crystalline superconductors where a unique
combination of both type-1 (kappa_1 < 0.707) and type-2 (kappa_2 > 0.707)
superconductor conditions is realized for the two components of the order... | cond-mat_supr-con |
Fermi-liquid state in $T$*-type La$_{1-x/2}$Eu$_{1-x/2}$Sr$_x$CuO$_4$
revealed via element substitution effects on magnetism: Despite its unique structural features, the magnetism of single-layered
cuprate with five oxygen coordination ($T$*-type structure) has not been
investigated thus far. Here, we report the resu... | cond-mat_supr-con |
Capturing Complex Behaviour in Josephson Travelling Wave Parametric
Amplifiers: We present an analysis of wave-mixing in recently developed Josephson
Travelling Wave Parametric Amplifiers (JTWPAs). Circuit simulations performed
using WRspice show the full behaviour of the JTWPA allowing propagation of all
tones. The ... | cond-mat_supr-con |
Possible coexistence of double-Q magnetic order and chequerboard charge
order in the re-entrant tetragonal phase of Ba0.76K0.24Fe2As2: We investigate the re-entrant tetragonal phase in the iron-based
superconductor Ba0 .76K0.24Fe2As2 by DC magnetization and thermoelectrical
measurements. The reversible magnetization ... | cond-mat_supr-con |
Stable Thermomagnetic Waves in Hard Superconductors: The problem of the stability of a nonlinear thermomagnetic wave with respect
to small thermal and electromagnetic perturbations in hard superconductors was
studied. It is shown that spatially bounded solutions may correspond only to
the perturbations decaying with ti... | cond-mat_supr-con |
Role of interactions in the energy of the spin resonance peak in
Fe-based superconductors: We consider the spin response within the five-orbital model for iron-based
superconductors and study two cases: equal and unequal gaps in different bands.
In the first case, the spin resonance peak in the superconducting state ... | cond-mat_supr-con |
Four-legged starfish-shaped Cooper pairs with ultrashort antinodal
length scales in cuprate superconductors: Cooper pairs of mutually attracting electrons form the building blocks of
superconductivity. Thirty years after the discovery of high-temperature
superconductivity in cuprates, many details of the pairs remain... | cond-mat_supr-con |
Pressure-induced Superconductivity in Noncentrosymmetric Weyl Semimetals
LaAlX (X = Si and Ge): In topological materials, Dirac fermions can split into two Weyl fermions
with opposite chiralities due to the breaking of space inversion symmetry,
while in non-centrosymmetric superconductors, novel superconducting elect... | cond-mat_supr-con |
Three-Dimensional Phase-Kink State in Thick Stack of Josephson Junctions
and Terahertz Radiation: The dynamics of superconductivity phase in thick stack of Josephson junctions
with strong inductive coupling, such as the one realized in layered high-$T_c$
cuprates and possibly the recently discovered FeAs-based superc... | cond-mat_supr-con |
Interplay between superconductivity and itinerant magnetism in
underdoped Ba$_{1-x}$K$_x$Fe$_2$As$_2$ ($x=$ 0.2) probed by the response to
controlled point-like disorder: The response of superconductors to controlled introduction of point-like
disorder is an important tool to probe their microscopic electronic coll... | cond-mat_supr-con |
Optical symmetries and anisotropic transport in high-Tc superconductors: A simple symmetry analysis of in-plane and out-of-plane transport in a family
of high temperature superconductors is presented. It is shown that generalized
scaling relations exist between the low frequency electronic Raman response and
the low fr... | cond-mat_supr-con |
Numerical simulation of thermal noise in Josephson circuits: We present a method to numerically add thermal noise to the equations of
motion for a circuit of Josephson junctions. A new noise term, which we call
"linearly interpolated Gaussian noise," replaces the usual white noise process.
It consists of random noise v... | cond-mat_supr-con |
Bi-directional ultrafast electric-field gating of interlayer transport
in a cuprate superconductor: In cuprate superconductors, tunneling between planes makes possible
three-dimensional coherent transport. However, the interlayer tunnelling
amplitude is reduced when an order-parameter phase gradient between planes is... | cond-mat_supr-con |
Properties of High-Tc Single Crystals as Natural Interferometers in the
THz Frequency Range: We consider oblique incidence of (p)TM-polarized wave on the anisotropic
superconducting slab, immersed on a dielectric media, such that its uniaxial
(c) axis is perpendicular to the surfaces. The below and above plasma frequ... | cond-mat_supr-con |
A Comment on ``Superconducting-Normal Phase Transition in (Ba1-xKx)BiO3,
x = 0.40, 0.47'' by B. F. Woodfield, D. A. Wright, R. A. Fisher, N. E.
Phillips and H. Y. Tang, Phys. Rev. Lett. 83, 4622 (1999): This comment addresses criticisms of our PRL 82 (1999) p. 4532-4535
(cond-mat/9904288) raised by Woodfield et al.... | cond-mat_supr-con |
Design and testing of high-speed interconnects for Superconducting
multi-chip modules: Superconducting single flux quantum (SFQ) circuits can process information at
extremely high speeds, in the range of hundreds of GHz. SFQ circuits are based
on Josephson junction cells for switching logic and ballistic transmission... | cond-mat_supr-con |
Quasiparticle scattering in a superconductor near a nematic critical
point: resonance mode and multiple attractive channels: We analyze the scattering rate for 2D fermions interacting via soft nematic
fluctuations. The ground state is an s-wave superconductor, but other pairing
channels are almost equally attractive.... | cond-mat_supr-con |
Boron Spectral Density and Disorder Broadening in B-doped Diamond: Comparison of periodic B dopants with a random alloy of substitional boron in
diamond is carried out using several supercells and the coherent potential
approximation (CPA) for the random alloy case. The main peak in the B local
density of states is shi... | cond-mat_supr-con |
Upper critical field Hc2 in Bechgaard salts (TMTSF)2PF6: The symmetry of the superconductivity in Bechgaard salts is still unknown,
though the triplet pairing has been established by Hc2 and NMR for (TMTSF)2PF6.
The large upper critical field at T = 0K (Hc2 ~ 5 Tesla) both for H || a and H
|| b also indicates strongly ... | cond-mat_supr-con |
Possible Superconductivity in Fe-Sb Based Materials: Density Functional
Study of LiFeSb: We investigate the electronic and other properties of the hypothetical
compound LiFeSb in relation to superconducting LiFeAs and FeSe using density
functional calculations. The results show that LiFeSb in the LiFeAs structure
wou... | cond-mat_supr-con |
Ultrasensitive interplay between ferromagnetism and superconductivity in
NbGd composite thin films: A model binary hybrid system composed of a randomly distributed rare-earth
ferromagnetic (Gd) part embedded in an s-wave superconducting (Nb) matrix is
being manufactured to study the interplay between competing superc... | cond-mat_supr-con |
Superconducting electronic state in optimally doped YBa2Cu3O7-d observed
with laser-excited angle-resolved photoemission spectroscopy: Low energy electronic structure of optimally doped YBa2Cu3O7-d is
investigated using laser-excited angle-resolved photoemission spectroscopy. The
surface state and the CuO chain band ... | cond-mat_supr-con |
Long-lived, radiation-suppressed superconducting quantum bit in a planar
geometry: We present a superconducting qubit design that is fabricated in a 2D geometry
over a superconducting ground plane to enhance the lifetime. The qubit is
coupled to a microstrip resonator for readout. The circuit is fabricated on a
silic... | cond-mat_supr-con |
Impurity-induced broadening of the transition to a
Fulde-Ferrell-Larkin-Ovchinnikov phase: Recent study on doping effects in the heavy fermion superconductor CeCoIn$_5$
has shown that a small amount of doping induces unexpectedly large broadening
of the second order transition into the high field and low temperature ... | cond-mat_supr-con |
Impurity bound states in fully gapped $d$-wave superconductors with
subdominant order parameters: Impurities in superconductors and their induced bound states are important
both for engineering novel states such as Majorana zero-energy modes and for
probing bulk properties of the superconducting state. The high-tempe... | cond-mat_supr-con |
Observation of an isotropic superconducting gap at the Brillouin zone
center of Tl$_{0.63}$K$_{0.37}$Fe$_{1.78}$Se$_2$: We performed a high-resolution angle-resolved photoemission spectroscopy
study on superconducting (SC) Tl$_{0.63}$K$_{0.37}$Fe$_{1.78}$Se$_2$ ($T_c=29$
K) in the whole Brillouin zone (BZ). In additi... | cond-mat_supr-con |
Size of stripe domains in a superconducting ferromagnet: In a superconducting ferromagnet, the superconducting state appears in the
ferromagnetic phase where usually a domain structure has already developed. We
study the influence of the superconducting screening currents on a stripe
structure with out-of-plane magneti... | cond-mat_supr-con |
Andreev reflection and spin polarization measurement of Co/YBCO junction: We report temperature dependent Andreev reflection measurements of Co/
Y$_{1}$Ba$_{2}$Cu$_{3}$O$_{7-\delta}$ (YBCO) heterostructure samples with
junction areas of 1 $\mu$m diameter. Modelling of the 5-70 K conductivity data
according to a modifie... | cond-mat_supr-con |
Magnetism and superconductivity in Ru(1-x)Sr2RECu(2+x)O(8-d) (RE=Gd, Eu)
and RuSr2Gd(1-y)Ce(y)Cu2O8 compounds: We discuss the properties of new superconducting compositions of
Ru(1-x)Sr2RECu(2+x)O(8-d) (RE=Gd, Eu) ruthenocuprates that were synthesized at
600 atm. of oxygen at 1080 C. By changing ratio between the Ru ... | cond-mat_supr-con |
Superconductivity in dilute SrTiO$_3$: a review: Doped SrTiO$_3$, one of the most dilute bulk systems to display
superconductivity, is perhaps the first example of an unconventional
superconductor, as it does not fit into the standard BCS paradigm. More than
five decades of research has revealed a rich temperature-carr... | cond-mat_supr-con |
Electronic phase separation in iron selenide (Li, Fe)OHFeSe
superconductor system: The phenomenon of phase separation into antiferromagnetic (AFM) and
superconducting (SC) or normal-state regions has great implication for the
origin of high-temperature (high-Tc) superconductivity. However, the occurrence
of an intrin... | cond-mat_supr-con |
Theoretical investigation of magnetic order in ReOFeAs, Re = Ce, Pr: Density functional theory (DFT) calculations are carried out on ReOFeAs, Re =
Ce, Pr, the parent compounds of the high-T$_c$ superconductors
ReO$_{1-x}$F$_{x}$FeAs, in order to determine the magnetic order of the ground
state. It is found that the mag... | cond-mat_supr-con |
Hole doping dependences of the magnetic penetration depth and vortex
core size in YBa2Cu3Oy: Evidence for stripe correlations near 1/8 hole doping: We report on muon spin rotation measurements of the internal magnetic field
distribution n(B) in the vortex solid phase of YBa2Cu3Oy (YBCO) single
crystals, from which we... | cond-mat_supr-con |
Effect of Coulomb Interaction and Disorder on Density of States in
Conventional Superconductors: The density of states of the disordered s-wave superconductor is calculated
perturbatively. The effect of Coulomb interaction on diffusively moving
electrons in the normal state has been known before, but in the supercond... | cond-mat_supr-con |
Hall Anomaly and Vortex-Lattice Melting in Superconducting Single
Crystal YBa2Cu3O7-d: Sub-nanovolt resolution longitudinal and Hall voltages are measured in an
ultra pure YBa2Cu3O7-d single crystal. The Hall anomaly and the first-order
vortex-lattice melting transition are observed simultaneously. Changes in the
dyn... | cond-mat_supr-con |
Nernst effect anisotropy as a sensitive probe of Fermi surface
distortions from electron-nematic order: We analyze the thermoelectric response in layered metals with spontaneously
broken rotation symmetry. We identify the anisotropy of the quasiparticle
Nernst signal as an extremely sensitive probe of Fermi surface d... | cond-mat_supr-con |
Experimental Evidences for Static Charge Density Waves in Iron
Oxy-pnictides: In this Letter we report high-resolution synchrotron X-ray powder diffraction
and transmission electron microscope analysis of Mn-substituted LaFeAsO
samples, demonstrating that a static incommensurate modulated structure
develops across th... | cond-mat_supr-con |
The pseudogap in Bi2212 single crystals from tunneling measurements: a
possible evidence for the Cooper pairs above Tc: We present electron-tunneling spectroscopy of slightly overdoped Bi2212
single crystals with Tc = 87 - 90 K in a temperature range between 14 K and 290
K using a break-junction technique. The pseudo... | cond-mat_supr-con |
Macroscale three-dimensional proximity effect in disordered
normal/superconductor nanocomposites: Recently, interest in Superconductor (S)-Normal (N) interfaces was renewed by
the observation of exotic proximity effects in various systems, including
S/semiconductor, S/ferromagnet, and S/topological insulator. In gene... | cond-mat_supr-con |
Transport properties of Lix(NH3)yFe2(TezSe1-z)2 single crystals in the
mixed state: We study the electric transport properties of Lix(NH3)yFe2(TezSe1-z)2 single
crystals with z= 0 and 0.6 in the mixed state. Thermally-activated flux-flow,
vortex glass and flux-flow Hall effect (FFHE) behaviors are observed.
Experimen... | cond-mat_supr-con |
On the Mechanism of Superconductivity in HTSC from Tunneling
Spectroscopy Measurements on Bi-2212 Single Crystals: The paper has been withdrawn by the author because the observed effect has a
different origin. | cond-mat_supr-con |
Anomalous thermodynamic power laws near topological transitions in nodal
superconductors: Unconventional superconductors are most frequently identified by the
observation of power-law behaviour on low-temperature thermodynamic or
transport properties, such as specific heat. Here we show that, in addition to
the usual... | cond-mat_supr-con |
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