FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases

被引：24

作者：

Zheng, Zhen ^{[1
,5
]}

Gong, Ming ^{[2
,3
]}

Zhang, Yichao ^{[1
,5
]}

Zou, Xubo ^{[1
,5
]}

Zhang, Chuanwei ^{[4
]}

Guo, Guangcan ^{[1
,5
]}

机构：

[1] Univ Sci & Technol China, Key Lab Quantum Informat, Anhua 230026, Peoples R China

[2] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

[3] Chinese Univ Hong Kong, Ctr Quantum Coherence, Shatin, Hong Kong, Peoples R China

[4] Univ Texas Dallas, Dept Phys, Dallas, TX 75080 USA

[5] USTC, Synerget Innovat Ctr Quantum Informat & Quantum, Hefei 230026, Anhui, Peoples R China

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

SUPERCONDUCTIVITY;

D O I：

10.1038/srep06535

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We show that the combination of spin-orbit coupling and in-plane Zeeman field in a two-dimensional degenerate Fermi gas can lead to a larger parameter region for Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phases than that using spin-imbalanced Fermi gases. The resulting FFLO superfluids are also more stable due to the enhanced energy difference between FFLO and conventional Bardeen-Cooper-Schrieffer (BCS) excited states. We clarify the crucial role of the symmetry of Fermi surface on the formation of finite momentum pairing. The phase diagram for FFLO superfluids is obtained in the BCS-BEC crossover region and possible experimental observations of FFLO phases are discussed.

引用

页数：7

共 51 条

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