Competing orders in one-dimensional spin-3/2 fermionic systems

被引：150
作者：
Wu, CJ [1 ]
机构：
[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[2] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 26期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.95.266404
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Novel competing orders are found in spin-3/2 cold atomic systems in one-dimensional optical traps and lattices. In particular, the quartetting phase, a four-fermion counterpart of Cooper pairing, exists in a large portion of the phase diagram. The transition between the quartetting and singlet Cooper pairing phases is controlled by an Ising symmetry breaking in one of the spin channels. The singlet Cooper pairing phase also survives in the purely repulsive interaction regime. In addition, various charge and bond ordered phases are identified at commensurate fillings in lattice systems.
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共 30 条
[1]   One-dimensional SU(4) spin-orbital model: A low-energy effective theory [J].
Azaria, P ;
Gogolin, AO ;
Lecheminant, P ;
Nersesyan, AA .
PHYSICAL REVIEW LETTERS, 1999, 83 (03) :624-627
[2]   Effect of symmetry-breaking perturbations in the one-dimensional SU(4) spin-orbital model [J].
Azaria, P ;
Boulat, E ;
Lecheminant, P .
PHYSICAL REVIEW B, 2000, 61 (18) :12112-12125
[3]  
Azaria P., COMMUNICATION
[4]   Weak-coupling phase diagram of the two-chain Hubbard model [J].
Balents, L ;
Fisher, MPA .
PHYSICAL REVIEW B, 1996, 53 (18) :12133-12141
[5]  
BARTENSTEIN M, CONDMAT0412712
[6]  
BRAATEN E, CONDMAT0410417
[7]  
CHEN S, IN PRESS PHYS REV B
[8]   Spinor bosonic atoms in optical lattices: Symmetry breaking and fractionalization [J].
Demler, E ;
Zhou, F .
PHYSICAL REVIEW LETTERS, 2002, 88 (16) :4
[9]   Staggered orbital currents in the half-filled two-leg ladder -: art. no. 125106 [J].
Fjærestad, JO ;
Marston, JB .
PHYSICAL REVIEW B, 2002, 65 (12) :1-8
[10]   Fragmented and single condensate ground states of spin-1 Bose gas [J].
Ho, TL ;
Yip, SK .
PHYSICAL REVIEW LETTERS, 2000, 84 (18) :4031-4034
123