Phase Separation and Pair Condensation in a Spin-Imbalanced 2D Fermi Gas

Debayan Mitra, Peter T. Brown, Peter Schauß, Stanimir S. Kondov, Waseem S. Bakr

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

We study a two-component quasi-two-dimensional Fermi gas with imbalanced spin populations. We probe the gas at different interaction strengths and polarizations by measuring the density of each spin component in the trap and the pair momentum distribution after time of flight. For a wide range of experimental parameters, we observe in-trap phase separation characterized by the appearance of a spin-balanced core surrounded by a polarized gas. Our momentum space measurements indicate pair condensation in the imbalanced gas even for large polarizations where phase separation vanishes, pointing to the presence of a polarized pair condensate. Our observation of zero momentum pair condensates in 2D spin-imbalanced gases opens the way to explorations of more exotic superfluid phases that occupy a large part of the phase diagram in lower dimensions.

Original languageEnglish (US)
Article number093601
JournalPhysical review letters
Volume117
Issue number9
DOIs
StatePublished - Aug 24 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Phase Separation and Pair Condensation in a Spin-Imbalanced 2D Fermi Gas'. Together they form a unique fingerprint.

  • Cite this