Universality in low-dimensional BCS theory

J Henheik, AB Lauritsen, B Roos - Reviews in Mathematical …, 2024 - World Scientific
It is a remarkable property of BCS theory that the ratio of the energy gap at zero temperature
Ξ and the critical temperature T c is (approximately) given by a universal constant …

Degeneracy between even- and odd-parity superconductivity in the quasi-one-dimensional Hubbard model and implications for

T Scaffidi - Physical Review B, 2023 - APS
Based on a weak coupling calculation, we show that an accidental degeneracy appears
between even-and odd-parity superconductivity in the quasi-one-dimensional (1D) limit of …

Universal behavior of the BCS energy gap

J Henheik, AB kgaard Lauritsen - Journal of Spectral Theory, 2025 - ems.press
the BCS order parameter) at all temperatures 0 Ä T Ä Tc up to the critical one, Tc, and show
that, in the limit of weak coupling, the ratio „. T/= Tc is given by a universal function of the …

Type-1.5 superconductivity in multicomponent systems

E Babaev, J Carlström, M Silaev, JM Speight - Physica C: Superconductivity …, 2017 - Elsevier
In general a superconducting state breaks multiple symmetries and, therefore, is
characterized by several different coherence lengths ξ i, i= 1,…, N. Moreover in multiband …

Microscopic Ginzburg-Landau theory and singlet ordering in

G Wagner, HS Røising, F Flicker, SH Simon - Physical Review B, 2021 - APS
The long-standing quest to determine the superconducting order of Sr 2 RuO 4 (SRO) has
received renewed attention after recent nuclear magnetic resonance (NMR) Knight shift …

Almost flat angles in surface superconductivity

M Correggi, EL Giacomelli - Nonlinearity, 2021 - iopscience.iop.org
Type-II superconductivity is known to persist close to the sample surface in presence of a
strong magnetic field. As a consequence, the ground state energy in the Ginzburg–Landau …

Ubiquity of superconducting domes in the bardeen-cooper-schrieffer theory with finite-range potentials

E Langmann, C Triola, AV Balatsky - Physical review letters, 2019 - APS
Based on recent progress in mathematical physics, we present a reliable method to
analytically solve the linearized Bardeen-Cooper-Schrieffer (BCS) gap equation for a large …

Effects of corners in surface superconductivity

M Correggi, EL Giacomelli - Calculus of Variations and Partial Differential …, 2021 - Springer
Abstract We study the Ginzburg–Landau functional describing an extreme type-II
superconductor wire with cross section with finitely many corners at the boundary. We derive …

Microscopic derivation of Ginzburg-Landau theory and the BCS critical temperature shift in a weak homogeneous magnetic field

A Deuchert, C Hainzl, M Oliver Maier - Probability and mathematical …, 2023 - msp.org
Abstract Starting from the Bardeen–Cooper–Schrieffer (BCS) free energy functional, we
derive the Ginzburg–Landau functional in the presence of a weak homogeneous magnetic …

Degeneracy between even-and odd-parity superconductivity in the quasi-1D Hubbard model and implications for Sr2RuO4

T Scaffidi - arxiv preprint arxiv:2007.13769, 2020 - arxiv.org
Based on a weak coupling calculation, we show that an accidental degeneracy appears
between even-and odd-parity superconductivity in the quasi-1D limit of the repulsive …