This review focuses on the most important features of the 40 K superconductor MgB 2—the
weakly interacting multiple bands (the σ and π bands) and the distinct multiple …

This article summarizes some of the relevant features exhibited by binary mixtures of Bose–
Einstein condensates in the presence of coherent coupling at zero temperature. The …

Quasiclassic Usadel equations for two-band superconductors in the dirty limit are derived
with the account of both intraband and interband scattering by nonmagnetic impurities. From …

We study the superconducting pairing symmetry in twisted bilayer graphene by solving the
Bogoliubov-de Gennes equation for all electrons in moiré supercells. With increasing the …

Dense quantum chromodynamic matter accommodates various kind of topological solitons
such as vortices, domain walls, monopoles, kinks, boojums, and so on. In this review, we …

High-temperature superconductivity (HTSC) in copper oxides emerges on a layered CuO 2
plane when an antiferromagnetic Mott insulator is doped with mobile hole carriers. We …

Magnesium diboride, MgB2, which was discovered to be a superconductor with a transition
temperature c of 39 K in 2YY1 [1], shows a unique property of being a clear example of a …

The Leggett mode associated with out-of-phase oscillations of the superconducting phase in
multiband superconductors usually is heavy due to interband coupling, which makes its …

Multicomponent superconductivity is realized in multiband superconductors when an
interband pairing interaction is considerably weaker than the intraband interactions. There is …

The effects of the coupling between two electronic condensates in two-gap mesoscopic
superconductors are studied within the Ginzburg-Landau theory using a finite difference …