Fractional quantum Hall effect in topological flat bands with Chern number two
Fractional quantum Hall effect in topological flat bands with Chern number two
复制标题
陈二数拓扑平带中的分数量子霍尔效应
DOI:
10.1103/physrevb.86.201101
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发表时间:
2012-04
影响因子:
3.7
通讯作者:
Sheng, D. N.
中科院分区:
文献类型:
--
作者:
Wang, Yi-Fei;Yao, Hong;Gong, Chang-De;Sheng, D. N.
Recent theoretical works have demonstrated various robust Abelian and non-Abelian fractional topological phases in lattice models with topological flat bands carrying Chern number C = 1. Here we study hard-core bosons and interacting fermions in a three-band triangular-lattice model with the lowest topological flat band of Chern number C = 2. We find convincing numerical evidence of bosonic fractional quantum Hall effect at the � = 1/3 filling characterized by three-fold quasidegeneracy of ground states on a torus, a fractional Chern number for each ground state, a robust spectrum gap, and a gap in quasihole excitation spectrum. We also observe numerical evidence of a robust fermionic fractional quantum Hall effect for spinless fermions at the � = 1/5 filling with short-range interactions.
DOI:
10.1017/cbo9781139207249.009
发表时间:
2012
期刊:
--
影响因子:
--
作者:
W. Marsden
通讯作者:
W. Marsden
影响因子:
1.7
作者:
X. Wen
通讯作者:
X. Wen
影响因子:
3.5
作者:
M. Fisher
通讯作者:
M. Fisher