Superfluid weight and Berezinskii-Kosterlitz-Thouless transition temperature of strained graphene
Sign Up to like & getrecommendations! Published in 2021 at "Chinese Journal of Physics"
DOI: 10.1016/j.cjph.2021.01.009
Abstract: Abstract We obtain the superfluid weight and Berezinskii-Kosterlitz-Thouless (BKT) transition temperature for highly unconventional superconducting states with the coexistence of chiral d-wave superconductivity, charge density waves and pair density waves in the strained graphene. Our… read more here.
Keywords: transition temperature; strained graphene; temperature; weight berezinskii ... See more keywords
Superfluid weight cross-over and critical temperature enhancement in singular flat bands
Sign Up to like & getrecommendations! Published in 2024 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2416726122
Abstract: Significance The threshold for free vortex formation in a two-dimensional superconductor limits the temperatures below which the supercurrent flows without dissipation. Here, it is shown that an essential singularity in an electron’s wave function results… read more here.
Keywords: temperature enhancement; weight cross; superfluid weight; geometry ... See more keywords
Superfluid weight and polarization amplitude in the one-dimensional bosonic Hubbard model
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.174517
Abstract: We calculate the superfluid weight and the polarization amplitude for the one-dimensional bosonic Hubbard model focusing on the strong-coupling regime. Other than analytic calculations we apply two methods: variational Monte Carlo based on the Baeriswyl… read more here.
Keywords: model; superfluid; superfluid weight; polarization amplitude ... See more keywords
Band geometry, Berry curvature and superfluid weight
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.95.024515
Abstract: We present a theory of the superfluid weight in multiband attractive Hubbard models within the Bardeen-Cooper-Schrieffer (BCS) mean-field framework. We show how to separate the geometric contribution to the superfluid weight from the conventional one,… read more here.
Keywords: berry curvature; geometry; superfluid weight;