402 citations · 2.3k across the 85 of their papers we have counts for
17 papers · 1 filter
Superconductivity in SrTiO: dielectric function method for non-parabolic bands
S. N. Klimin, J. Tempere, J. T. Devreese +3
The dielectric function method for superconductivity has been applied to SrTiO accounting for the non-parabolic dispersion of charge carriers in the conduction band and for t…
Nanoscale assembly of superconducting vortices with scanning tunnelling microscope tip
Jun-Yi Ge, Vladimir N. Gladilin, Jacques Tempere +5
Vortices play a crucial role in determining the properties of superconductors as well as their applications. Therefore, characterization and manipulation of vortices, especially at…
Multiband superconductivity due to the electron - LO-phonon interaction in strontium titanate and on a SrTiO3/LaAlO3 interface
S. N. Klimin, J. Tempere, J. T. Devreese +1
In strontium titanate, the Froehlich electron - LO-phonon interaction dominates the electron response and can also provide superconductivity. Because of high LO-phonon frequencies…
Magnetic Dipoles at Topological Defects in the Meissner State of a Nanostructured Superconductor
Jun-Yi Ge, Vladimir N. Gladioli, Cun Xue +5
In a magnetic field, superconductivity is manifested by total magnetic field expulsion (Meissner effect) or by the penetration of integer multiples of the flux quantum Φ_0. Here we…
Interface superconductivity in LaAlO-SrTiO heterostructures
S. N. Klimin, J. Tempere, J. T. Devreese +1
The interface superconductivity in LaAlO-SrTiO heterostructures reveals a non-monotonic behavior of the critical temperature as a function of the two-dimensional densit…
Aharonov-Bohm oscillations in the vortex dynamics in superconducting hollow cylinders
V. N. Gladilin, J. Tempere, J. T. Devreese +1
Using time-dependent Ginzburg-Landau theory we demonstrate that the Aharonov-Bohm (AB) effect, resulting from a Berry phase shift of the (macroscopic) wavefunction, is revealed thr…
Stable "antiferromagnetic" vortex lattice imprinted into a type-II superconductor
V. N. Gladilin, J. Tempere, J. T. Devreese +1
In type-II superconductors, where vortices and antivortices tend to annihilate, only a "ferromagnetic" vortex lattice, with the same orientation of vortex magnetic moments, is usua…
Negative-μ regime in the ac magnetic response of superconductor nanoshells
V. N. Gladilin, J. Tempere, J. T. Devreese +1
The time-dependent Ginzburg-Landau formalism is applied to analyze the vortex states and vortex dynamics in superconducting spherical nanoshells, subjected to mutually perpendicula…
Vortex core deformation and stepper motor behavior in a superconducting ratchet
J. Van de Vondel, V. N. Gladilin, A. V. Silhanek +4
We investigated experimentally the frequency dependence of a superconducting vortex ratchet effect by means of electrical transport measurements and modeled it theoretically using…
Froehlich Polaron and Bipolaron: Recent Developments
Jozef Devreese, Sasha Alexandrov
It is remarkable how the Froehlich polaron, one of the simplest examples of a Quantum Field Theoretical problem, as it basically consists of a single fermion interacting with a sca…
Co-existence of the Meissner and vortex-state on a superconducting spherical shell
J. Tempere, V. N. Gladilin, I. F. Silvera +2
We show that on superconducting spherical nanoshells, the co-existence of the Meissner state with a variety of vortex patterns drives the phase transition to higher magnetic fields…
Imbalanced d-wave superfluids in the BCS-BEC crossover regime at finite temperatures
J. Tempere, S. N. Klimin, J. T. Devreese +1
Singlet pairing in a Fermi superfluid is frustrated when the amounts of fermions of each pairing partner are unequal. The resulting `imbalanced superfluid' has been realized experi…
Vortices on a superconducting nanoshell: phase diagram and dynamics
V. N. Gladilin, J. Tempere, I. F. Silvera +2
In superconductors, the search for special vortex states such as giant vortices focuses on laterally confined or nanopatterned thin superconducting films, disks, rings, or polygons…
Evidence for nonmonotonic magnetic field penetration in a type-I superconductor
V. F. Kozhevnikov, C. V. Giuraniuc, M. J. Van Bael +12
Polarized neutron reflectometry (PNR) provides evidence that nonlocal electrodynamics governs the magnetic field penetration in an extreme low-k superconductor. The sample is an in…
Critical temperature and specific heat for Cooper pairing on a spherical surface
V. N. Gladilin, J. Tempere, I. F. Silvera +1
Based on an exact solution of the Bardeen-Cooper-Schrieffer type Hamiltonian on a spherical surface, we calculate the specific heat for the electron system with pair correlations o…
Imbalanced Fermi superfluid in a one-dimensional optical potential
J. Tempere, M. Wouters, J. T. Devreese
The superfluid properties of a two-state Fermi mixture in an optical lattice are profoundly modified when an imbalance in the population of the two states is present.We present ana…
Cooper pairing and superconductivity on a spherical surface
J. Tempere, V. N. Gladilin, I. F. Silvera +1
Electrons in a multielectron bubble in helium form a spherical, two-dimensional system coupled to the ripplons at the bubble surface. The electron-ripplon coupling, known to lead t…