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SYMMETRIES OF THE LARGE-U HUBBARD-MODEL AT HALF FILLING
CHAU, LL; HUANG, DW; YU, Y; CHAU, LL , UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA.
1992
发表期刊PHYSICAL REVIEW LETTERS
ISSN0031-9007
卷号68期号:16页码:2539-2542
摘要Symmetries of the Hubbard model in the large-U limit are discussed. We show that the global SU(2) symmetry of the full even-lattice Hubbard model generated by Yang's eta-pairing operators becomes a local symmetry in the large-U limit and is applicable to even-odd mixed lattices. This extends the well-known SU(2) local symmetry of Anderson, for which we construct the generators. The associated local gauge theory of the extended symmetry can be similarly formulated and has interesting physical implications: new mean-field theories with parity-changed pairings. We point out the importance of searching for the parity-dependent Aharonov-Bohm-type of effects related to these local gauge symmetries.
部门归属UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545; ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA
关键词High-tc Superconductivity Mean-field-theory Valence Bond State Antiferromagnet Mechanism Limit
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12170
专题理论物理所1978-2010年知识产出
通讯作者CHAU, LL , UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA.
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CHAU, LL,HUANG, DW,YU, Y,et al. SYMMETRIES OF THE LARGE-U HUBBARD-MODEL AT HALF FILLING[J]. PHYSICAL REVIEW LETTERS,1992,68(16):2539-2542.
APA CHAU, LL,HUANG, DW,YU, Y,&CHAU, LL , UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA..(1992).SYMMETRIES OF THE LARGE-U HUBBARD-MODEL AT HALF FILLING.PHYSICAL REVIEW LETTERS,68(16),2539-2542.
MLA CHAU, LL,et al."SYMMETRIES OF THE LARGE-U HUBBARD-MODEL AT HALF FILLING".PHYSICAL REVIEW LETTERS 68.16(1992):2539-2542.
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