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Diffusion Monte Carlo study of a spin-imbalanced two-dimensional Fermi gas with attractive interactions

Published version
Peer-reviewed

Type

Article

Change log

Authors

Foo, DCW 
Conduit, GJ 

Abstract

We probe the superconducting gap in the zero temperature ground state of an attractively interacting spin-imbalanced two-dimensional Fermi gas with Diffusion Monte Carlo. A condensate fraction at nonzero pair momentum evidences a spatially non-uniform superconducting order parameter. Comparison with exact diagonalisation studies confirms that the nonzero condensate fraction across a range of nonzero fermion pair momenta is consistent with non-exclusive pairing between majority and minority fermions, an extension beyond FFLO theory.

Description

Keywords

cond-mat.str-el, cond-mat.str-el, cond-mat.quant-gas, cond-mat.supr-con

Journal Title

Physical Review A

Conference Name

Journal ISSN

2469-9926
2469-9934

Volume Title

100

Publisher

American Physical Society (APS)

Rights

All rights reserved
Sponsorship
The Royal Society (uf130122)
Royal Society (RGF/EA/180034)