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arXiv 1203.1124cond-mat.str-el
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Bernevig-Hughes-Zhang模型中相互作用诱导的拓扑相变

Interaction induced topological phase transition in Bernevig-Hughes-Zhang model

Lei Wang, Xi Dai, X. C. Xie

摘要:

研究了Bernevig-Hughes-Zhang模型中相互作用诱导的拓扑相变。由单粒子格林函数直接计算相互作用系统的Z2指数,揭示了相变的拓扑性质。相互作用的Z2指数也一致地通过边缘谱检查。与从头算方法相结合,该方法是从第一性原理角度寻找相关拓扑绝缘材料的一种有效工具。

英文摘要:

We study interaction induced topological phase transition in Bernevig-Hughes-Zhang model. Topological nature of the phase transition is revealed by directly calculating the Z2 index of the interacting system from the single-particle Green's function. The interacting Z2 index is also consistently checked through the edge spectra. Combined with ab initio methods, present approach is a useful tool searching for correlated topological insulating materials from the first-principle point of view.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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