Condensate Fraction and Pair Coherence Lengths of Two-Dimension Fermi Gases with Spin-Orbit Coupling
Beibing Huang, Shaolong Wan
TL;DR
This paper investigates how Rashba spin-orbit coupling influences the BCS-BEC crossover, condensate fraction, and pair coherence lengths in a two-dimensional Fermi gas, revealing that strong SOC alters the crossover and affects pairing properties.
Contribution
It provides new insights into the effects of strong spin-orbit coupling on pairing phenomena in two-dimensional Fermi gases at zero temperature.
Findings
SOC beyond a critical value prevents conventional BCS-BEC crossover
SOC increases condensate fraction
SOC decreases pair coherence lengths
Abstract
The effects of Rashba spin-orbit coupling on BCS-BEC crossover, the condensate fraction and pair coherence lengths for a two-component attractive Fermi gas in two dimension are studied. The results at indicate that (1) when the strength of SOC is beyond a critical value, BCS-BEC crossover does not happen in a conventional sense; (2) SOC enhances the condensate fraction, but suppresses pair coherence lengths.
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Taxonomy
TopicsCold Atom Physics and Bose-Einstein Condensates · Atomic and Subatomic Physics Research · Physics of Superconductivity and Magnetism