Spontaneous quantum Hall effect in quarter-doped Hubbard model on honeycomb lattice and its possible realization in doped graphene system

Spontaneous quantum Hall effect in quarter-doped Hubbard model on honeycomb lattice and its possible realization in doped graphene system
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蜂窝晶格四分之一掺杂哈伯德模型中的自发量子霍尔效应及其在掺杂石墨烯系统中的可能实现

DOI:
10.1209/0295-5075/97/37001
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发表时间:
2011-03
期刊:
EPL
影响因子:
1.8
通讯作者:
Li, Tao
Li, Tao
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Li, Tao

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结果表明,由于费米面的嵌套性质,在蜂窝晶格上四分之一掺杂的Hubbard模型中实现了具有非零自旋手征的磁绝缘态。这种状态是拓扑非平凡的,具有量子化霍尔效应。
We show that a magnetic insulating state with nonzero spin chirality is realized in a quarter-doped Hubbard model on honeycomb lattice as a result of the nesting property of the Fermi surface. This state is topological nontrivial and has a quantized Hall
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