I review theoretical ideas and implications of experiments for the gap structure and symmetry
of the Fe-based superconductors. Unlike any other class of unconventional …

In the pursuit of higher critical temperature of superconductivity, quasiflat electronic bands
and Van Hove singularities in two dimensions (2D) have emerged as a potential approach …

Multicomponent superconductivity is a novel quantum phenomenon in many different
superconducting materials, such as multiband ones in which different superconducting gaps …

We report the experimental formation of a fractional vortex generated by using a thin
superconducting bi-layer in the form of a niobium bi-layer, observed as a magnetic flux …

We derive microscopically the Ginzburg-Landau free-energy functional for a superconductor
in which the Cooper pairs are formed not only by quasiparticles from the same band, but …

A recent Little-Parks experiment in Kagome-structured superconductor CsV3Sb5
demonstrated resistance oscillations with period ϕ 0/3= hc/6 e. Here, we perform analysis …

This study explores transitions between states with different winding number in two-band
superconducting rings. From the time-dependent Ginzburg-Landau equations for two …

Emerging in the 1950s, the multiband superconductivity has been considered for a long time
as an approximate model in the form of a generalization of the BCS theory to the case of two …

We investigate the Bardeen-Cooper-Schrieffer–Bose-Einstein condensation crossover in a
two-band superfluid Fermi gas with an energy shift between the bands. When the intraband …

The Josephson equations predict remarkable effects concerning the phase state of a
superconducting junction with an oscillating current induced by a static voltage. Whether the …