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Diamagnetism of real-space pairs above Tc in hole doped cuprates: The nonlinear normal state diamagnetism reported by Lu Li et al. [Phys. Rev.
B 81, 054510 (2010)] is shown to be incompatible with an acclaimed Cooper
pairing and vortex liquid above the resistive critical temperature. Instead it
is perfectly compatible ... | cond-mat_supr-con |
Shaping graphene superconductivity with nanometer precision: Graphene holds great potential for superconductivity due to its pure
two-dimensional nature, the ability to tune its carrier density through
electrostatic gating, and its unique, relativistic-like electronic properties.
At present, we are still far from contr... | cond-mat_supr-con |
Vortex Interaction with Mesoscopic Irregularities in High Temperature
Superconductors: The conformal mapping method is used to study the problem of flux line
interaction with surface cavities having cylindrical profile and characteristic
size much less than the penetration length, i.e, within mesoscopic scale. It is
... | cond-mat_supr-con |
Magnetic-Field-Induced Localization of Quasiparticles in Underdoped
La$_{2-x}$Sr$_x$CuO$_4$ Single Crystals: Magnetic-field-induced ordering of electrons around vortices is a striking
phenomenon recently found in high-$T_c$ cuprates. To identify its consequence
in the quasiparticle dynamics, the magnetic-field ($H$) ... | cond-mat_supr-con |
The dual nature of magnetism in a uranium heavy fermion system: The duality between localized and itinerant nature of magnetism in
$5\textit{f}$ electron systems has been a longstanding puzzle. Here, we report
inelastic neutron scattering measurements, which reveal both local and
itinerant aspects of magnetism in a sin... | cond-mat_supr-con |
Vortex pattern in a nanoscopic cylinder: A superconducting nanoscopic cylinder, with radius $R = 4.0\xi$ and height $D
= 4.0\xi$ is submitted to an applied field along the cylinder axis. The
Ginzburg-Landau theory is solved in three-dimensions using the simulated
annealing technique to minimize the free energy function... | cond-mat_supr-con |
Thermal Conductivity as a Probe of Quasi-Particles in the Cuprates: In underdoped YBa_2Cu_3O_x (x=6.63), the low-T thermal conductivity Kappa_xx
varies steeply with field B at small B, and saturates to a nearly
field-independent value at high fields. The simple expression [1+p(T)|B|]^(-1)
provides an excellent fit to K... | cond-mat_supr-con |
Comment on ``Critical current density from magnetization hysteresis data
using the critical-state model'': A recent paper [Physical Review {\bf B 64} 014508 (2001)] claims to present
an exact method to extract the critical current density J$_C$ from the M-H
hysteresis curve. We show that this claim appears unjustifie... | cond-mat_supr-con |
Vortex Phase Diagram of weakly pinned YBa$_2$Cu$_3$O$_{7-δ}$ for H
$\parallel$ c: Vortex phase diagram in a weakly pinned crystal of YBCO for H $\parallel$ c
is reviewed in the light of a recent elucidation of the process of `inverse
melting' in a Bismuth cuprate system and the imaging of an interface between
the ord... | cond-mat_supr-con |
Microwave absorption in s- and d-wave disordered superconductors: We model s- and d-wave ceramic superconductors with a three-dimensional
lattice of randomly distributed Josephson junctions with finite
self-inductance. The field and temperature dependences of the microwave
absoption are obtained by solving the correspo... | cond-mat_supr-con |
A Trapped Field of 17.6 T in Melt-Processed, Bulk Gd-Ba-Cu-O Reinforced
with Shrink-Fit Steel: The ability of large grain, REBa$_{2}$Cu$_{3}$O$_{7-\delta}$ [(RE)BCO; RE =
rare earth] bulk superconductors to trap magnetic field is determined by their
critical current. With high trapped fields, however, bulk samples ar... | cond-mat_supr-con |
Low-temperature high-frequency dynamic magnetic susceptibility of
classical spin-ice Dy$_2$Ti$_2$O$_7$: Radio-frequency (14.6 MHz) AC magnetic susceptibility, $\chi^{\prime}_{AC}$,
of \dytio\ was measured using a self-oscillating tunnel-diode resonator.
Measurements were made with the excitation AC field parallel to ... | cond-mat_supr-con |
Single particle tunneling spectroscopy and superconducting gaps in
layered iron based superconductor KCa$_{2}$Fe$_{4}$As$_{4}$F$_{2}$: We perform scanning tunneling microscopy/spectroscopy study on the layered
iron based superconductor KCa$_2$Fe$_4$As$_4$F$_2$ with a critical temperature
of about 33.5 K. Two types of... | cond-mat_supr-con |
Pair correlations in the two-orbital Hubbard ladder: Implications on
superconductivity in the bilayer nickelate La$_3$Ni$_2$O$_7$: Motivated by high-temperature superconductivity in pressurized
La$_3$Ni$_2$O$_7$, we investigate the pair correlations in the two-orbital
Hubbard ladder, which consists of the nearly half... | cond-mat_supr-con |
Topological Josephson Heat Engine: The promise of fault-tolerant quantum computing has made topological
superconductors the focus of intense research during the past decade. In this
context, topological Josephson junctions based on nanowires or on topological
insulators provide an alternative route for probing topologi... | cond-mat_supr-con |
Polar Kerr effect from a time-reversal symmetry breaking unidirectional
charge density wave: We analyze the Hall conductivity $\sigma_{xy}(\omega)$ of a charge ordered
state with momentum $\mathbf{Q}=(0,2Q)$ and calculate the intrinsic
contribution to the Kerr angle $\Theta_K$ using the fully reconstructed
tight-bind... | cond-mat_supr-con |
A possible cooling effect in high temperature superconductors: We show that an adiabatic increase of the supercurrent along a superconductor
with lines of nodes of the order parameter on the Fermi surface can result in a
cooling effect. The maximum cooling occurs if the supercurrent increases up to
its critical value. ... | cond-mat_supr-con |
Spin-pumping from a ferromagnetic insulator to an unconventional
superconductor with interfacial Andreev bound-states: Spin-pumping from a ferromagnetic insulator into a high-$T_c$ superconductor
with a $d$-wave superconducting order parameter has recently been
experimentally observed. Such unconventional superconduc... | cond-mat_supr-con |
Impurity bands in magnetic superconductors with spin density wave: Magnetic superconductors define a broad class of strongly correlated
materials in which superconductivity may coexist with either localized or
itinerant long-range magnetic order. In this work we consider a multiband model
of a disordered magnetic super... | cond-mat_supr-con |
Quasi-1-Dimensional Superconductivity in Highly Disordered NbN Nanowires: The topic of superconductivity in strongly disordered materials has attracted
a significant attention. In particular vivid debates are related to the subject
of intrinsic spatial inhomogeneity responsible for non-BCS relation between the
supercon... | cond-mat_supr-con |
Overscreening in Hubbard electron systems: We show that doping-induced charge fluctuations in strongly correlated
Hubbard electron systems near the 1/2-filled, insulating limit cause
overscreening of the electron-electron Coulomb repulsion. The resulting
attractive screened interaction potential supports d_{x^2-y^2}-pa... | cond-mat_supr-con |
Unconventional dynamical covalency driven superconductivity in Nb doped
SrTiO3: Nb doped SrTiO3, the first discovered two-gap superconductor, is shown to be
the most unconventional one of the known multiband superconductors, since the
smaller of the two superconducting gaps follows a non BCS temperature
dependence. S... | cond-mat_supr-con |
Optimization of parameters of nanostructure for study inverse proximity
effects on "superconductor-ferromagnetic" interface using Polarized Neutron
Reflectometry in enhanced standing wave regime: This work is devoted to experimental study of influence of superconductivity
(S) on ferromagnetism (FM) (inverse proximi... | cond-mat_supr-con |
Evidence for an angular dependent contribution from columnar defects to
the equilibrium magnetization of YBa_2Cu_3O_{7-d}: We have measured an angle-dependent contribution to the equilibrium
magnetization of a YBa_2Cu_3O_{7-d} single crystal with columnar defects
created by 5.8GeV Pb ions. This contribution manifests... | cond-mat_supr-con |
Ground state angular momentum, spectral asymmetry, and topology in
chiral superfluids and superconductors: Recently it was discovered that the ground state orbital angular momentum in
two-dimensional chiral superfluids with pairing symmetry $(p_x+ip_y)^\nu$
depends on the winding number $\nu$ in a striking manner. Th... | cond-mat_supr-con |
Bifurcation structure and chaos in nanomagnet coupled to Josephson
junction: Recently an irregular easy axis reorientation demonstrating the Kapitza
pendulum features were observed in numerical simulations of nanomagnet coupled
to the Josephson junction. To explain its origin we study the magnetization
bifurcations a... | cond-mat_supr-con |
Change of the vortex core structure in two-band superconductors at
impurity-scattering-driven $s_\pm/s_{++}$ crossover: We report a nontrivial transition in the core structure of vortices in
two-band superconductors as a function of interband impurity scattering. We
demonstrate that, in addition to singular zeros of ... | cond-mat_supr-con |
Temperature dependence of iron local magnetic moment in phase-separated
superconducting chalcogenide: We have studied local magnetic moment and electronic phase separation in
superconducting K$_{x}$Fe$_{2-y}$Se$_2$ by x-ray emission and absorption
spectroscopy. Detailed temperature dependent measurements at the Fe K-... | cond-mat_supr-con |
Time relaxation of microwave second order response of superconductors in
the critical state: Relaxation of the microwave second order response of YBa2Cu3O7 and
Ba0.6K0.4BiO3 crystals in the critical state is studied. The samples are
exposed to static and pulsed microwave magnetic fields. The second harmonic
signals d... | cond-mat_supr-con |
Paramagnetic Effects in the Vortex Lattice Field Distribution of
Strongly Type-II Superconductors: We present an analysis of the magnetic field distribution in the Abrikosov
lattice of high-$\kappa$ superconductors with singlet pairing in the case where
the critical field is mainly determined by the Pauli limit and t... | cond-mat_supr-con |
Quasiparticle dispersion and lineshape in a strongly correlated liquid
with the fermion condensate: A model of a strongly correlated electron liquid based on the fermion
condensation (FC) is applied to the consideration of high temperature
superconductors in its superconducting and normal states. Within our model the... | cond-mat_supr-con |
Stacked Josephson junction SQUID: Operation of a Superconducting Quantum Interference Device (SQUID) made of
stacked Josephson junctions is analyzed numerically for a variety of junction
parameters. Due to a magnetic coupling of junctions in the stack, such a SQUID
has certain advantages as compared to an uncoupled mul... | cond-mat_supr-con |
Depinning of a vortex chain in a disordered flow channel: We study depinning of vortex chains in channels formed by static, disordered
vortex arrays. Depinning is governed either by the barrier for defect
nucleation or for defect motion, depending on whether the chain periodicity is
commensurate or incommensurate with ... | cond-mat_supr-con |
Antiferromagnetically Driven Electronic Correlation in Iron Pnictides
and Cuprates: The iron pnictides and the cuprates represent two families of materials,
where strong antiferromagnetic correlation drives three other distinct ordering
tendencies: (1) superconducting pairing, (2) Fermi surface distortion, and (3)
or... | cond-mat_supr-con |
Emergence of Superconductivity from Fully Incoherent Normal State in an
Iron-Based Superconductor (Ba$_{0.6}$K$_{0.4}$)Fe$_2$As$_2$: In unconventional superconductors, it is generally believed that
understanding the physical properties of the normal state is a pre-requisite
for understanding the superconductivity mec... | cond-mat_supr-con |
Enhancement of the retrapping current of superconducting microbridges of
finite length: We theoretically find that the resistance of a superconducting
microbridge/nanowire {\it decreases} while the retrapping current $I_r$ for the
transition to the superconducting state {\it increases} when one suppresses the
magnitu... | cond-mat_supr-con |
Hysteresis in mesoscopic superconducting disks: the Bean-Livingston
barrier: The magnetization behavior of mesoscopic superconducting disks can show
hysteretic behavior which we explain by using the Ginzburg-Landau (GL) theory
and properly taking into account the de-magnetization effects due to
geometrical form facto... | cond-mat_supr-con |
Superconductivity and Charge Density Wave of CuIr2Te4 by Iodine Doping: Here we report a systematic investigation on the evolution of the structural
and physical properties, including the charge density wave and
superconductivity of the polycrystalline CuIr2Te4-xIx. X-ray diffraction
results indicate that both of a and... | cond-mat_supr-con |
Quantum phase slip phenomenon in superconducting nanowires with
low-Ohmic environment: In a number of recent experiments it has been demonstrated that in
ultra-narrow superconducting channels quantum fluctuations of the order
parameter, alternatively called quantum phase slips, are responsible for the
finite resistan... | cond-mat_supr-con |
Doping dependence of electromagnetic response in cuprate superconductors: The study of the electromagnetic response in cuprate superconductors plays a
crucial role in the understanding of the essential physics of these materials.
Here the doping dependence of the electromagnetic response in cuprate
superconductors is s... | cond-mat_supr-con |
Critical behavior at superconductor-insulator phase transitions near one
dimension: I argue that the system of interacting bosons at zero temperature and in
random external potential possesses a simple critical point which describes the
proliferation of disorder-induced topological defects in the superfluid ground
st... | cond-mat_supr-con |
Fractional Josephson Vortices and Braiding of Majorana Zero Modes in
Planar Superconductor-Semiconductor Heterostructures: We consider the one-dimensional (1D) topological superconductor that may form
in a planar superconductor-metal-superconductor Josephson junction in which the
metal is is subjected to spin orbit c... | cond-mat_supr-con |
Is the anisotropy of the upper critical field of Sr$_2$RuO$_4$
consistent with a helical $p$-wave state?: We calculate the angular and temperature $T$ dependencies of the upper
critical field $H_{c2}(\theta,\phi,T)$ for the $C_{4v}$ point group helical
$p$-wave states, assuming a single uniaxial ellipsoidal Fermi sur... | cond-mat_supr-con |
Renormalized q-dependent Spin Susceptibility by inverting the Random
Phase Approximation: Implications for quantitative assessment of the role of
spin fluctuations in 2D Ising superconductor NbSe$_{2}$: Accurate determination of the full momentum-dependent spin susceptibility
$\chi(\mathbf{q}) $ is very important f... | cond-mat_supr-con |
Nonlinear Coupling in Nb/NbN Superconducting Microwave Resonators: In this experimental study we show that the coupling between Nb/NbN
superconducting microwave resonators and their feedline can be made amplitude
dependent. We employ this mechanism to tune the resonators into critical
coupling condition, a preferable m... | cond-mat_supr-con |
Local dynamical lattice instabilities: Prerequisites for resonant
pairing superconductivity: Fluctuating local diamagnetic pairs of electrons, embedded in a Fermi sea,
are candidates for non-phonon-mediated superconductors without the stringent
conditions on Tc which arise in phonon-mediated BCS classical low-Tc
supe... | cond-mat_supr-con |
A close look at antiferromagnetism in multidimensional phase diagram of
electron-doped copper oxide: Emergency of superconductivity at the instabilities of antiferromagnetism
(AFM), spin/charge density waves has been widely recognized in unconventional
superconductors. In copper-oxide superconductors, spin fluctuatio... | cond-mat_supr-con |
Sensitivity of the superconducting state and magnetic susceptibility to
key aspects of electronic structure in ferropnictides: Experiments on the iron-pnictide superconductors appear to show some
materials where the ground state is fully gapped, and others where low-energy
excitations dominate, possibly indicative of... | cond-mat_supr-con |
A new seeding technique for the reliable fabrication of large, SmBCO
single grains containing silver using top seeded melt growth: Silver (Ag) is an established additive for improving the mechanical
properties of single grain, (RE)BCO bulk superconductors (where RE = Sm, Gd and
Y). The presence of Ag in the (RE)BCO b... | cond-mat_supr-con |
Electronic Structure of
$\mathrm{Sr}_{1-y}\mathrm{Ca}_{y}\mathrm{Fe_{2}}(\mathrm{As}_{1-x}\mathrm{P}_{x}\mathrm{)_{2}}$
($x$ = 0.25, $y$ = 0.08) Revealed by Angle-Resolved Photoemission
Spectroscopy: We have investigated the electronic structure of
$\mathrm{Sr}_{1-y}\mathrm{Ca}_{y}\mathrm{Fe_{2}}(\mathrm{As}_{1-x... | cond-mat_supr-con |
Nonlinear Seebeck Effect in a Model Granular Superconductor: The change of the Josephson supercurrent density of a weakly-connected
granular superconductor in response to externally applied arbitrary thermal
gradient dT/dx (nonlinear Seebeck effect) is considered within a model of 3D
Josephson junction arrays. For dT/d... | cond-mat_supr-con |
Stability of Mixed-Symmetry Superconducting States with Broken
Time-Reversal Symmetry against Lattice Distortions: We examine the stability of mixed-symmetry superconducting states with broken
time-reversal symmetry in spatial-symmetry-broken systems, including chiral
states, on the basis of the free-energy functiona... | cond-mat_supr-con |
History effects and pinning regimes in solid vortex matter: We propose a phenomenological model that accounts for the history effects
observed in ac susceptibility measurements in YBa2Cu3O7 single crystals [Phys.
Rev. Lett. 84, 4200 (2000) and Phys. Rev. Lett. 86, 504 (2001)]. Central to the
model is the assumption tha... | cond-mat_supr-con |
Spin-dependent quasiparticle reflection and bound states at interfaces
with itinerant antiferromagnets: We present a formulation of the quasiclassical theory of junctions between
itinerant antiferromagnets (AF) and s-wave (sSC) and d-wave superconductors
(dSC). For the simplest two-sublattice antiferromagnet on a bip... | cond-mat_supr-con |
Magnetic dipole induced guided vortex motion: We present evidence of magnetically controlled guided vortex motion in a
hybrid superconductor/ferromagnet nanosystem consisting of an Al film on top of
a square array of permalloy square rings. When the rings are magnetized with an
in-plane external field H, an array of po... | cond-mat_supr-con |
Coherent Modulation of the YBa2Cu3O6+x Atomic Structure by Displacive
Stimulated Ionic Raman Scattering: We discuss the mechanism of coherent phonon generation by Stimulated Ionic
Raman Scattering, a process different from conventional excitation with near
visible optical pulses. Ionic Raman scattering is driven by a... | cond-mat_supr-con |
Theory of the in-plane anisotropy of magnetic excitations in
YBa_{2}Cu_{3}O_{6+y}: A pronounced xy-anisotropy was observed in recent neutron scattering
experiments for magnetic excitations in untwinned YBa_{2}Cu_{3}O_{6+y} (YBCO).
The small anisotropy of the bare band structure due to the orthorhombic crystal
symmetr... | cond-mat_supr-con |
Universal Fermi velocity in highly compressed hydride superconductors: Fermi velocity, $v_F$, is one of the primary characteristics of any
conductor, including superconductors. For conductors at ambient pressure
several experimental techniques have been developed to measure $v_F$ and, for
instance, Zhou et al (Nature 4... | cond-mat_supr-con |
The Ground-state Inter-plane Superconducting Coherence Length of
La$_{1.875}$Sr$_{0.125}$CuO$_4$ Measured by a "Xiometer": A long excitation coil piercing a superconducting (SC) ring is used to
generate ever increasing persistent current in the ring, until the current
destroys the order parameter. Given that the pene... | cond-mat_supr-con |
The influence of the spin-dependent phases of tunneling electrons on the
conductance of a point ferromagnet/isolator/d-wave superconductor contact: The influence of the spin-dependent phase shifts (SDPS) associated to the
electronic reflection and transmission amplitudes acquired by electrons upon
scattering on the p... | cond-mat_supr-con |
Magnetoelectric effects in superconductors due to spin-orbit scattering:
a non-linear $σ$-model description: We suggest a generalization of nonlinear $\sigma$-model for diffusive
superconducting systems to account for magnetoelectric effects due to
spin-orbit scattering. In the leading orders of spin-orbit strength a... | cond-mat_supr-con |
Collective mode in the SU(2) theory of cuprates: Recent advances in momentum-resolved electron energy-loss spectroscopy
(MEELS) and resonant inelastic X-ray scattering (RIXS) now allow one to access
the charge response function with unprecedented versatility and accuracy. This
allows for the study of excitations which ... | cond-mat_supr-con |
Exotic Superconducting Phases of Ultracold Atom Mixtures on Triangular
Lattices: We study the phase diagram of two-dimensional Bose-Fermi mixtures of
ultracold atoms on a triangular optical lattice, in the limit when the velocity
of bosonic condensate fluctuations is much larger than the Fermi velocity.
We contrast... | cond-mat_supr-con |
Superconductivity in the non-oxide Perovskite MgCNi3: The oxide perovskites are a large family of materials with many important
physical properties. Of particular interest has been the fact that this
structure type provides an excellent structural framework for the existence of
superconductivity. The high Tc copper oxi... | cond-mat_supr-con |
Theory of Local Density of States of d-Wave Superconducting State Near
the Surfaces of the t-J Model: Spatial dependencies of the pair potential and the local density of states
near the surfaces of $d_{x^{2}-y^{2}}$-wave superconductors are studied
theoretically. The calculation is based on the t-J model within a mea... | cond-mat_supr-con |
Superconducting and thermal properties of ex-situ Glidcop sheathed
multifilamentary MgB2 wires: In DC and AC practical applications of MgB2 superconducting wires an
important role is represented by the material sheath which has to provide,
among other things, a suitable electrical and thermal stabilization. A way to
... | cond-mat_supr-con |
Temperature, RF Field, and Frequency Dependence Performance Evaluation
of Superconducting Niobium Half-Wave Cavity: Recent advancement in superconducting radio frequency cavity processing
techniques, with diffusion of impurities within the RF penetration depth,
resulted in high quality factor with increase in quality... | cond-mat_supr-con |
Electronic structure of CaFe2As2: Contribution of itinerant Fe 3d-states
to the Fermi Level: We present density functional theory (DFT) calculations and a full set of
X-ray spectra (resonant inelastic X-ray scattering and X-ray photoelectron
spectra) measurements of single crystal CaFe2As2. The experimental valence b... | cond-mat_supr-con |
ARPES experiment in fermiology of quasi-2D metals (Review Article): Angle resolved photoemission spectroscopy (ARPES) enables direct observation
of the Fermi surface and underlying electronic structure of crystals---the
basic concepts to describe all the electronic properties of solids and to
understand the key electro... | cond-mat_supr-con |
Electronic theory for the normal state spin dynamics in Sr$_2$RuO$_4$:
anisotropy due to spin-orbit coupling: Using a three-band Hubbard Hamiltonian we calculate within the
random-phase-approximation the spin susceptibility, $\chi({\bf q},\omega)$, and
NMR spin-lattice relaxation rate, 1/T$_1$, in the normal state of... | cond-mat_supr-con |
DFT+U study of magnetic order in doped La$_2$CuO$_4$ crystals: This article presents the results of several magnetic phases of doped
La$_{2-x}$Sr$_x$CuO$_4$ using density-functional theory with an added Hubbard
term (DFT+U). Doping factors from $x=0$ to 0.25 were examined. We found that a
bond centered stripe is the ma... | cond-mat_supr-con |
Onset of Superfluidity in 4He Films Adsorbed on Disordered Substrates: We have studied 4He films adsorbed in two porous glasses, aerogel and Vycor,
using high precision torsional oscillator and DC calorimetry techniques. Our
investigation focused on the onset of superfluidity at low temperatures as the
4He coverage is ... | cond-mat_supr-con |
Controlling the Intrinsic Josephson Junction Number in a
$\mathbf{Bi_2Sr_2CaCu_2O_{8+δ}}$ Mesa: In fabricating $\mathrm{Bi_2Sr_2CaCu_2O_{8+\delta}}$ intrinsic Josephson
junctions in 4-terminal mesa structures, we modify the conventional fabrication
process by markedly reducing the etching rates of argon ion milling. ... | 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 |
Optical Conductivity Anisotropy in the Undoped Three-Orbital Hubbard
Model for the Pnictides: The resistivity anisotropy unveiled in the study of detwinned single crystals
of the undoped 122 pnictides is here studied using the two-dimensional
three-orbital Hubbard model in the mean-field approximation. Calculating th... | cond-mat_supr-con |
Probing d-wave pairing correlations in the pseudogap regime of the
cuprate superconductors via low-energy states near impurities: The issue of probing the pseudogap regime of the cuprate superconductors,
specifically with regard to the existence and nature of superconducting pairing
correlations of d-wave symmetry, i... | cond-mat_supr-con |
Hund's coupling stabilized superconductivity in the presence of
spin-orbit interactions: The intraorbital repulsive Hubbard interaction cannot lead to attractive
superconducting pairing states, except through the Kohn-Luttinger mechanism.
This situation may change when we include additional local interactions such as... | cond-mat_supr-con |
Pairing, Pseudogap and Fermi Arcs in Cuprates: We use Angle Resolved Photoemission Spectroscopy (ARPES) to study the
relationship between the pseudogap, pairing and Fermi arcs in cuprates. High
quality data measured over a wide range of dopings reveals a consistent picture
of Fermiology and pairing in these materials. ... | cond-mat_supr-con |
Theoretical study on the correlation between the spin fluctuation and
$T_c$ in the isovalent-doped 1111 iron-based superconductors: Motivated by recent experiments on isovalent-doped 1111 iron-based
superconductors LaFeAs$_{1-{x}}$P$_{x}$O$_{1-{y}}$F$_{y}$ and the theoretical
study that followed, we investigate, with... | cond-mat_supr-con |
First order $0$ - $π$ phase transitions in
superconductor/ferromagnet/superconductor trilayers: We study the thermodynamics of the diffusive SFS trilayer composed of thin
superconductor (S) and ferromagnet (F) layers. On the basis the self-consistent
solutions of nonlinear Usadel equations in the F and S layers we ob... | cond-mat_supr-con |
Constrain relations for superfluid weight and pairings in a chiral flat
band superconductor: Within ten years, flat band (FB) superconductivity has gained a huge interest
for its remarkable features and connection to quantum geometry. We investigate
the superconductivity in a FB system whose orbitals are inequivalent... | cond-mat_supr-con |
Non-London electrodynamics in a multiband London model:
anisotropy-induced non-localities and multiple magnetic field penetration
lengths: The London model describes strongly type-2 superconductors as massive vector
field theories, where the magnetic field decays exponentially at the length
scale of the London pene... | cond-mat_supr-con |
Ferromagnetic-superconducting hybrid films and their possible
applications: A direct study in a model combinatorial film: Model combinatorial films (CFs) which host a pure superconductor adjacent to
a ferromagneticsuperconducting hybrid film (HF) are manufactured for the study
of the influence of ferromagnetic nanopa... | cond-mat_supr-con |
The resonance peak in the electron-doped cuprate superconductors: We study the emergence of a magnetic resonance in the superconducting state
of the electron-doped cuprate superconductors. We show that the recently
observed resonance peak in the electron-doped superconductor
Pr$_{0.88}$LaCe$_{0.12}$CuO$_{4-\delta}$ is ... | cond-mat_supr-con |
Comment on "Large energy gaps in CaC6 from tunneling spectroscopy:
possible evidence of strong-coupling superconductivity": Comment on "Large energy gaps in CaC6 from tunneling spectroscopy: possible
evidence of strong-coupling superconductivity" | cond-mat_supr-con |
In-gap states of magnetic impurity in quantum spin Hall insulator
proximitized to a superconductor: We study in-gap states of a single magnetic impurity embedded in a honeycomb
monolayer which is deposited on superconducting substrate. The intrinsic
spin-orbit coupling induces the quantum spin Hall insulating (QSHI) ... | cond-mat_supr-con |
Nonlinear features of the superconductor--ferromagnet--superconductor
$\varphi_0$ Josephson junction in ferromagnetic resonance region: We demonstrate the manifestations of the nonlinear features in magnetic
dynamics and IV-characteristics of the $\varphi_0$ Josephson junction in the
ferromagnetic resonance region. W... | cond-mat_supr-con |
Diamagnetic susceptibility obtained from the six-vertex model and its
implications for the high-temperature diamagnetic state of cuprate
superconductors: We study the diamagnetism of the 6-vertex model with the arrows as directed
bond currents. To our knowledge, this is the first study of the diamagnetism of
this m... | cond-mat_supr-con |
Evidence of zero point fluctuation of vortices in a very weakly pinned
a-MoGe thin film: In a Type II superconductor, the vortex core behaves like a normal metal.
Consequently, the single-particle density of states in the vortex core of a
conventional Type II superconductor remains either flat or (for very clean
sing... | cond-mat_supr-con |
Persistent electrical doping of Bi2Sr2CaCu2O8+x mesa structures: Application of a significantly large bias voltage to small Bi2Sr2CaCu2O8+x
mesa structures leads to persistent doping of the mesas. Here we employ this
effect for analysis of the doping dependence of the electronic spectra of
Bi-2212 single crystals by me... | cond-mat_supr-con |
The Topological Relation Between Bulk Gap Nodes and Surface Bound States
: Application to Iron-based Superconductors: In the past few years materials with protected gapless surface (edge) states
have risen to the central stage of condensed matter physics. Almost all
discussions centered around topological insulators ... | cond-mat_supr-con |
Unconventional superconductivity induced in Nb films by adsorbed chiral
molecules: Motivated by recent observations of chiral-induced magnetization and
spin-selective transport we studied the effect of chiral molecules on
conventional BCS superconductors. By applying scanning tunneling spectroscopy,
we demonstrate th... | cond-mat_supr-con |
Comment on "Microwave vortex dissipation of superconducting Nd-Ce-Cu-O
epitaxial films in high magnetic fields": While the electrodynamic treatment of a superconducting thin film by Yeh et
al. [Phys. Rev. B 48, 9861 (1993)] ostensibly has application for the
"thin-film limit," their work is shown to employ bulk-like ... | cond-mat_supr-con |
Cooper-pair size and binding energy for unconventional superconducting
systems: The main proposal of this paper is to analyze the size of the Cooper pairs
composed by unbalanced mass fermions from different electronic bands along the
BCS-BEC crossover and study the binding energy of the pairs. We are considering
an i... | cond-mat_supr-con |
Upper limit on spontaneous supercurrents in Sr$_2$RuO$_4$: It is widely believed that the perovskite Sr$_2$RuO$_4$ is an unconventional
superconductor with broken time reversal symmetry. It has been predicted that
superconductors with broken time reversal symmetry should have spontaneously
generated supercurrents at ed... | cond-mat_supr-con |
Magnetism and Superconductivity in Ferromagnetic Heavy Fermion System
UCoGe under In-plane Magnetic Fields: We study the ferromagnetic superconductor UCoGe at ambient pressure under
$ab$-plane magnetic fields $\vec{H}$ which are perpendicular to the
ferromagnetic easy axis. It is shown that, by taking into account th... | cond-mat_supr-con |
Mössbauer spectroscopy study of magnetic fluctuations in
superconducting RbGd$_2$Fe$_4$As$_4$O$_2$: $^{57}$Fe M\"ossbauer spectra were measured at different temperatures between
5.9 K and 300 K on the recently discovered self-doped superconducting
RbGd$_2$Fe$_4$As$_4$O$_2$ with T$_c$ as high as 35 K. Singlet pattern ... | cond-mat_supr-con |
Three-band superconductivity and the order parameter that breaks
time-reversal symmetry: We consider a model of multiband superconductivity, inspired by iron
pnictides, in which three bands are connected via repulsive pair-scattering
terms. Generically, three distinct superconducting states arise within such a
model.... | cond-mat_supr-con |
Pressure Driven Fractionalization of Ionic Spins Results in Cupratelike
High-$T_c$ Superconductivity in La$_3$Ni$_2$O$_7$: Beyond 14GPa of pressure, bi-layered La$_3$Ni$_2$O$_7$ was recently found to
develop strong superconductivity above the liquid nitrogen boiling temperature.
An immediate essential question is the... | cond-mat_supr-con |
Observation of Higher-Order Sideband Transitions and First-Order
Sideband Rabi Oscillations in a Superconducting Flux Qubit Coupled to a SQUID
Plasma Mode: We report results of spectroscopic measurements and time-domain measurements
of a superconducting flux qubit. The dc superconducting quantum interference
device... | cond-mat_supr-con |
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