Spectral signatures of the Fulde-Ferrell-Larkin-Ovchinnikov order parameter in one-dimensional optical lattices

被引：46

作者：

Bakhtiari, M. Reza ^{[1
]}

Leskinen, M. J. ^{[1
]}

Torma, P. ^{[1
]}

机构：

[1] Helsinki Univ Technol, Dept Engn Phys, Helsinki 02015, Finland

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.101.120404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We address an imbalanced two-component atomic Fermi gas restricted by a one-dimensional (1D) optical lattice and an external harmonic potential, within the mean-field Bogoliubov-de Gennes formalism. We show that characteristic features of the Fulde-Ferrell-Larkin-Ovchinnikov state are visible in the rf spectra and in the momentum-resolved photoemission spectra of the gas. Specially, Andreev states or midgap states can be clearly resolved, which gives a direct experimentally observable signature of the oscillating order parameter.

引用

页数：4

共 36 条

[1]

ALFORD MG, ARXIV07094635

[2] Exact numerical study of pair formation with imbalanced fermion populations [J].

Batrouni, G. G. ;

Huntley, M. H. ;

Rousseau, V. G. ;

Scalettar, R. T. .

PHYSICAL REVIEW LETTERS, 2008, 100 (11)

[3] Possible Fulde-Ferrell-Larkin-Ovchinnikov superconducting state in CeCoIn5 -: art. no. 187004 [J].

Bianchi, A ;

Movshovich, R ;

Capan, C ;

Pagliuso, PG ;

Sarrao, JL .

PHYSICAL REVIEW LETTERS, 2003, 91 (18)

[4] Observation of the pairing gap in a strongly interacting Fermi gas [J].

Chin, C ;

Bartenstein, M ;

Altmeyer, A ;

Riedl, S ;

Jochim, S ;

Denschlag, JH ;

Grimm, R .

SCIENCE, 2004, 305 (5687) :1128-1130

[5] Evidence for superfluidity of ultracold fermions in an optical lattice [J].

Chin, J. K. ;

Miller, D. E. ;

Liu, Y. ;

Stan, C. ;

Setiawan, W. ;

Sanner, C. ;

Xu, K. ;

Ketterle, W. .

NATURE, 2006, 443 (7114) :961-964

[6] Magnetic-field-induced lattice anomaly inside the superconducting state of CeCoIn5:: Anisotropic evidence of the possible Fulde-Ferrell-Larkin-Ovchinnikov state [J].

Correa, V. F. ;

Murphy, T. P. ;

Martin, C. ;

Purcell, K. M. ;

Palm, E. C. ;

Schmiedeshoff, G. M. ;

Cooley, J. C. ;

Tozer, S. W. .

PHYSICAL REVIEW LETTERS, 2007, 98 (08)

[7] Andreev-Saint-James reflections: A probe of cuprate superconductors [J].

Deutscher, G .

REVIEWS OF MODERN PHYSICS, 2005, 77 (01) :109-135

[8] Pairing states of a polarized Fermi gas trapped in a one-dimensional optical lattice [J].

Feiguin, A. E. ;

Heidrich-Meisner, F. .

PHYSICAL REVIEW B, 2007, 76 (22)

[9] SUPERCONDUCTIVITY IN STRONG SPIN-EXCHANGE FIELD [J].

FULDE, P ;

FERRELL, RA .

PHYSICAL REVIEW, 1964, 135 (3A) :A550-+

[10]

GIORGINI S, ARXIV07063360, P23405

← 1 2 3 4 →