| Interaction and spin–orbit effects on a kagome lattice at 1/3 filling |
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| 引用本文： | 刘海迪,陈耀桦,林恒福,陶红帅,武建华. Interaction and spin–orbit effects on a kagome lattice at 1/3 filling[J]. 中国物理 B, 2014, 0(7): 622-626 |
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| 作者姓名： | 刘海迪 陈耀桦 林恒福 陶红帅 武建华 |
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| 基金项目： | supported by the National Basic Research Program of China(Grant Nos.2011CB921502 and 2012CB821305);the National Natural ScienceFoundation of China(Grant Nos.61227902,61378017,and 11311120053) |
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| 摘 要： | We investigate the competing effects of spin-orbit coupling and electron--electron interaction on a kagome lattice at 1/3 filling. We apply the cellular dynamical mean-field theory and its real-space extension combined with the continuous time quantum Monte Carlo method, and obtain a phase diagram including the effects of the interaction and the spin-orbit coupling at T = 0. 1t, where T is the temperature and t is the hopping energy. We find that without the spin-orbit coupling, the system is in a semi-metal phase stable against the electron--electron interaction. The presence of the spin-orbit coupling can induce a topological non-trivial gap and drive the system to a topological insulator, and as the interaction increases, a larger spin--orbit coupling is required to reach the topological insulating phase.
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| 关 键 词： | 自旋轨道 晶格效应 电子相互作用 轨道耦合 填充 蒙特卡洛方法 驱动系统 平均场理论 |
Interaction and spin-orbit effects on a kagome lattice at 1/3 filling |
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| Liu Hai-Di Chen Yao-Hua Lin Heng-Fu Tao Hong-Shuai Wu Jian-Hua. Interaction and spin-orbit effects on a kagome lattice at 1/3 filling[J]. Chinese Physics B, 2014, 0(7): 622-626 |
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| Authors: | Liu Hai-Di Chen Yao-Hua Lin Heng-Fu Tao Hong-Shuai Wu Jian-Hua |
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| Abstract: | kagome lattice, spin-orbit coupling, Hubbard interaction |
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| Keywords: | kagome lattice spin-orbit coupling Hubbard interaction |
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