Mechanism for fluctuating pair density wave.

ABSTRACT: In weakly coupled BCS superconductors, only electrons within a tiny energy window around the Fermi energy, E_F, form Cooper pairs. This may not be the case in strong coupling superconductors such as cuprates, FeSe, SrTiO₃ or cold atom condensates where the pairing scale, E_B, becomes comparable or even larger than E_F. In cuprates, for example, a plausible candidate for the pseudogap state at low doping is a fluctuating pair density wave, but no microscopic model has yet been found which supports such a state. In this work, we write an analytically solvable model to examine pairing phases in the strongly coupled regime and in the presence of anisotropic interactions. Already for moderate coupling we find an unusual finite temperature phase, below an

SUBMITTER: Setty C 

PROVIDER: S-EPMC10235120 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature