Exotic superfluid of trapped Fermi gases with spin-orbit coupling in dimensional crossover

被引：0

作者：

Zhou, Jing ^{[1
,2
]}

Shi, Cheng ^{[1
]}

Zhou, Xiang-Fa ^{[3
]}

Wen, Lin ^{[4
]}

Chen, Peng ^{[1
]}

Li, Deng-Feng ^{[1
]}

机构：

[1] Chongqing Univ Posts & Telecommun, Dept Sci, Chongqing 400065, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Univ Sci & Technol China, CAS, Key Lab Quantum Informat, Hefei 230026, Anhui, Peoples R China

[4] Chongqing Normal Univ, Coll Phys & Elect Engn, Chongqing 401331, Peoples R China

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2016年 / 49卷 / 12期

关键词：

exotic superfluid; spin-orbit coupling; dimensional crossover; topological superfluid; nodal superfluid; TOPOLOGICAL INSULATORS; SUPERCONDUCTIVITY; FIELD;

D O I：

10.1088/0953-4075/49/12/125306

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the ground state properties of Fermi gases in a planar array of one-dimensional potential tubes with spin-orbit coupling where the motion of atoms is free in the (x) over cap -direction and the tunneling between nearest tubes in the (y) over cap -direction is permitted. By using the mean-field method, the phase diagrams of the system at the dimensional crossover from quasi-one dimension to quasi-two dimensions is obtained. We find the existence of the topological state and Majorana mode in the weak tunneling case, and a rich phase diagram including two kinds of nodal superfluid phase and gapped superfluid phase, in the opposite case. The results show that topological pairing is favored in quasi-one dimension while nodal pairing state is favored in quasi-two dimensions.

引用

页数：9

共 36 条

[11] BCS-BEC Crossover and Topological Phase Transition in 3D Spin-Orbit Coupled Degenerate Fermi Gases [J].

Gong, Ming ;

Tewari, Sumanta ;

Zhang, Chuanwei .

PHYSICAL REVIEW LETTERS, 2011, 107 (19)

[12] Colloquium: Topological insulators [J].

Hasan, M. Z. ;

Kane, C. L. .

REVIEWS OF MODERN PHYSICS, 2010, 82 (04) :3045-3067

[13] Selective Probing of Photoinduced Charge and Spin Dynamics in the Bulk and Surface of a Topological Insulator [J].

Hsieh, D. ;

Mahmood, F. ;

McIver, J. W. ;

Gardner, D. R. ;

Lee, Y. S. ;

Gedik, N. .

PHYSICAL REVIEW LETTERS, 2011, 107 (07)

[14] Texture in the superconducting order parameter of CeCoIn5 revealed by nuclear magnetic resonance -: art. no. 047602 [J].

Kakuyanagi, K ;

Saitoh, M ;

Kumagai, K ;

Takashima, S ;

Nohara, M ;

Takagi, H ;

Matsuda, Y .

PHYSICAL REVIEW LETTERS, 2005, 94 (04)

[15] Z2 topological order and the quantum spin Hall effect -: art. no. 146802 [J].

Kane, CL ;

Mele, EJ .

PHYSICAL REVIEW LETTERS, 2005, 95 (14)

[16]

Ketterle W, 2008, ARXIV08012500

[17]

Kitaev A Y, 2003, ANN PHYS, V321, P2111

[18] Spin-imbalance in a one-dimensional Fermi gas [J].

Liao, Yean-an ;

Rittner, Ann Sophie C. ;

Paprotta, Tobias ;

Li, Wenhui ;

Partridge, Guthrie B. ;

Hulet, Randall G. ;

Baur, Stefan K. ;

Mueller, Erich J. .

NATURE, 2010, 467 (7315) :567-U86

[19] Topological Fulde-Ferrell superfluid in spin-orbit-coupled atomic Fermi gases [J].

Liu, Xia-Ji ;

Hu, Hui .

PHYSICAL REVIEW A, 2013, 88 (02)

[20] Topological superfluid in one-dimensional spin-orbit-coupled atomic Fermi gases [J].

Liu, Xia-Ji ;

Hu, Hui .

PHYSICAL REVIEW A, 2012, 85 (03)

← 1 2 3 4 →