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题名: Mott insulating phases and quantum phase transitions of interacting spin-3/2 fermionic cold atoms in optical lattices at half filling
作者: Tu, Hong-Hao ;  Zhang, Guang-Ming ;  Yu, Lu
刊名: PHYSICAL REVIEW B
出版日期: 2007
卷号: 76, 期号:1, 页码:-
关键词: LARGE-N LIMIT ;  GAUGE STRUCTURE ;  SUPERCONDUCTORS ;  SYSTEMS ;  MODEL
学科分类: Physics
通讯作者: Zhang, GM , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
部门归属: Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We study various Mott insulating phases of interacting spin-3/3 fermionic ultracold atoms in two-dimensional square optical lattices at half filling. Using a generalized one-band Hubbard model with hidden SO(5) symmetry, we identify two distinct symmetry breaking phases: the degenerate antiferromagnetic spin-dipole-spin-octupole ordering and spin-quadrupole ordering, depending on the sign of the spin-dependent interaction. These two competing orders exhibit very different symmetry properties, low energy excitations, and topological characterizations. Near the SU(4) symmetric point, a quantum critical state with a pi-flux phase may emerge due to strong quantum fluctuations, leading to spin algebraic correlations and gapless excitations.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000248487900095
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5702
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Tu, Hong-Hao,Zhang, Guang-Ming,Yu, Lu. Mott insulating phases and quantum phase transitions of interacting spin-3/2 fermionic cold atoms in optical lattices at half filling[J]. PHYSICAL REVIEW B,2007,76(1):-.
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