Spin-quadrupole ordering of spin-3/2 ultracold fermionic atoms in optical lattices in the one-band Hubbard model
文献类型：期刊论文
| 作者 | Yu, Lu ; Tu, Hong-Hao; Zhang, Guang-Ming; Zhang, GM , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
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| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2006 |
| 卷号 | 74期号:17页码:- |
| 关键词 | Path-integral Approach Arbitrary Spin Systems Condensate Symmetry Gases |
| ISSN号 | 1098-0121 |
| 英文摘要 | Based on a generalized one-band Hubbard model, we study magnetic properties of Mott insulating states for ultracold spin-3/2 fermionic atoms in optical lattices. When the s-wave scattering lengths for the total spin S=2,0 satisfy conditions a(2)> a(0)> 0, we apply a functional integral approach to the half filled case, where the spin-quadrupole fluctuations dominate. On a two-dimensional square lattice, the saddle-point solution yields a staggered spin-quadrupole ordering at zero temperature with symmetry breaking from SO(5) to SO(4). Both spin and spin-quadrupole static structure factors are calculated, displaying highly anisotropic spin antiferromagnetic fluctuations and antiferroquadrupole long-range correlations, respectively. When Gaussian fluctuations around the saddle point are taken into account, spin-quadrupole density waves with a linear dispersion are derived. Compared with the spin-density waves in the half filled spin-1/2 Hubbard model, the quadrupole density wave velocity is saturated in the strong-coupling limit, and there are no transverse spin-quadrupole mode couplings, as required by the SO(4) invariance of the effective action. Finally, in the strong-coupling limit of the model Hamiltonian, we derive the effective hyperfine spin-exchange interactions for the Mott insulating phases in the quarter filled and half filled cases, respectively. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000242409000075 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5862]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Zhang, GM , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Lu,Tu, Hong-Hao,Zhang, Guang-Ming,et al. Spin-quadrupole ordering of spin-3/2 ultracold fermionic atoms in optical lattices in the one-band Hubbard model[J]. PHYSICAL REVIEW B,2006,74(17):-. |
| APA | Yu, Lu,Tu, Hong-Hao,Zhang, Guang-Ming,&Zhang, GM , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.(2006).Spin-quadrupole ordering of spin-3/2 ultracold fermionic atoms in optical lattices in the one-band Hubbard model.PHYSICAL REVIEW B,74(17),-. |
| MLA | Yu, Lu,et al."Spin-quadrupole ordering of spin-3/2 ultracold fermionic atoms in optical lattices in the one-band Hubbard model".PHYSICAL REVIEW B 74.17(2006):-. |
入库方式： OAI收割
来源：理论物理研究所
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