Intrinsic dissipative Floquet superconductors beyond mean-field theory

Q Yang, Z Yang, DE Liu - Physical Review B, 2021 - APS
Physical Review B, 2021APS
We study the intrinsic superconductivity in a dissipative Floquet electronic system in the
presence of attractive interactions. Based on the functional Keldysh theory beyond the mean-
field treatment, we find that the system shows a time-periodic bosonic condensation and
reaches an intrinsic dissipative Floquet superconducting (SC) phase. Due to the interplay
between dissipations and periodic modulations, the Floquet SC gap becomes “soft” and
contains the diffusive fermionic modes with finite lifetimes. However, bosonic modes of the …
We study the intrinsic superconductivity in a dissipative Floquet electronic system in the presence of attractive interactions. Based on the functional Keldysh theory beyond the mean-field treatment, we find that the system shows a time-periodic bosonic condensation and reaches an intrinsic dissipative Floquet superconducting (SC) phase. Due to the interplay between dissipations and periodic modulations, the Floquet SC gap becomes “soft” and contains the diffusive fermionic modes with finite lifetimes. However, bosonic modes of the bosonic condensation are still propagating even in the presence of dissipations.
American Physical Society
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