This article reviews theoretical and experimental work on the novel physics in multiband
superconductors. Multiband superconductors are characterized by multiple superconducting …

Discussing changes over the last two decades, this book represents an up-to-date treatment
of superfluidity. It covers new superfluid materials such as high-temperature and …

We show that continuous and spin-lattice models of chiral ferro-and antiferromagnets
provide the existence of an infinite number of stable soliton solutions of any integer …

We study a mixture of two superfluids with density–density and current–current (Andreev–
Bashkin) interspecies interactions. The Andreev–Bashkin coupling gives rise to a …

We report the discovery of attractive magnetic skyrmions and their clusters in
noncentrosymmetric ferromagnets. These three-dimensional solitons have been predicted to …

We study topological excitations in two-component nematic superconductors, with a
particular focus on Cu x Bi 2 Se 3 as a candidate material. We find that the lowest-energy …

We study the effects of quantum fluctuations in the two-component Bose-Hubbard model
generalizing to mixtures the quantum Gutzwiller approach introduced recently in [Phys. Rev …

Recent experiments [Grinenko et al. Nat. Phys. 17, 1254 (2021) NPAHAX 1745-2473
10.1038/s41567-021-01350-9] reported the observation of a condensate of four-fermion …

In multicomponent superfluids and superconductors, co-and counterflows of components
have, in general, different properties. AF Andreev and EP Bashkin [Sov. Phys. JETP 42, 164 …

When an in-plane field is applied to a clean interface superconductor, a Fulde-Ferrell-Larkin-
Ovchinnikov (FFLO)-like phase is stabilized. This phase has a U (1)× U (1) symmetry and, in …