期刊
PHYSICAL REVIEW A
卷 87, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.87.043633
关键词
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资金
- NKBRSFC [2009CB930701, 2010CB922904, 2011CB921502, 2012CB821300]
- NSFC [10934010]
- NSFC-RGC [11061160490, 1386-N-HKU748/10]
We investigate normal-state properties of spin-orbit-coupled Fermi gases with repulsive s-wave interaction, in the absence of molecule formation, i.e., in the so-called upper branch. Within the framework of random-phase approximation, we derive analytical expressions for the quasiparticle lifetime tau(s), the effective mass m*(s), and the Green's function renormalization factor Z(s) in the presence of Rashba spin-orbit coupling. In contrast to spin-orbit-coupled electron gas with Coulomb interaction, we show that the modifications are dependent on the Rashba band index s and occur in the first order of the spin-orbit-coupling strength. We also calculate experimental observables such as spectral weight, density of state, and specific heat, which exhibit significant differences from their counterparts without spin-orbit coupling. We expect our microscopic calculations of these Fermi-liquid parameters would have immediate applications to the spin-orbit-coupled Fermi gases in the upper branch of the energy spectrum.
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