A new nonlocal phenomenological theory of superconductivity is discussed based on
extension of the quantum momentum operator which is one of the main consequences of …

The peculiar superconducting properties of granular aluminum, which consists of nanometer-
sized aluminum grains separated by aluminum oxide, are attractive for applications in …

In crystalline solids, the acoustic phonon can be described either as a Goldstone or as a non‐
Abelian gauge boson. However, the non‐Abelianity of the related gauge group apparently …

Complex oxide interfaces are an intriguing and highly up-to-date field of research in solid
state physics driven forward by the recent progresses in oxide thin-film growth technology …

It has recently been indicated that optical and acoustic phonons can be identified with Higgs
and Goldstone excitations of the crystal lattice arising from the spontaneous breaking of a …