ITP OpenIR  > SCI期刊论文
Dai, JH; Feng, XY; Xiang, T; Yu, Y; Dai, JH , Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China.
Gapped spin-liquid states in a one-dimensional Hubbard model with antiferromagnetic exchange interaction
Source PublicationPHYSICAL REVIEW B
KeywordMatrix Renormalization-group T-j Model Phase-diagram Superconductivity Transition Systems Lattice Waves Chain
AbstractWe study the phase diagram of a one-dimensional extended Hubbard model with antiferromagnetic exchange interaction analytically and numerically. The bosonization and transfer-matrix renormalization group methods are used in the corresponding coupling regimes. At half-filling, the system is a Mott insulator with a finite spin excitation gap if the on-site Coulomb repulsion is fairly smaller than the antiferromagnetic exchange J. This Mott insulator is characterized by the bond-charge-density-wave order or spontaneously dimerization. In the weak-coupling regime where the spin-charge separation holds approximately, the critical point separating the gapless and gapped spin liquid phases is U(c)similar toJ/2. However, as J increases, the spin-charge couplings become important and the critical point U(c) is significantly suppressed and eventually tends to zero as J-->infinity. Away from half-filling, the charge gap completely collapses but the spin gap persists.
2004
ISSN1098-0121
Volume70Issue:6Pages:-
Subject AreaPhysics
Indexed BySCI
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14033
CollectionSCI期刊论文
Corresponding AuthorDai, JH , Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China.
Recommended Citation
GB/T 7714
Dai, JH,Feng, XY,Xiang, T,et al. Gapped spin-liquid states in a one-dimensional Hubbard model with antiferromagnetic exchange interaction[J]. PHYSICAL REVIEW B,2004,70(6):-.
APA Dai, JH,Feng, XY,Xiang, T,Yu, Y,&Dai, JH , Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China..(2004).Gapped spin-liquid states in a one-dimensional Hubbard model with antiferromagnetic exchange interaction.PHYSICAL REVIEW B,70(6),-.
MLA Dai, JH,et al."Gapped spin-liquid states in a one-dimensional Hubbard model with antiferromagnetic exchange interaction".PHYSICAL REVIEW B 70.6(2004):-.
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