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arXiv 1111.1172cond-mat.str-el
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分数阶陈式绝缘子的生态学

Zoology of Fractional Chern Insulators

Yang-Le Wu, B. Andrei Bernevig, N. Regnault

摘要:

我们研究了部分填充物存在强电子排斥作用的四种不同的陈绝缘体模型。我们观察到,所有的情况下表现出一个劳克林样相填充分数1/3。我们通过研究能量和纠缠谱提供了这种强相关拓扑相的证据。为了确定在这些系统中出现的劳克林物理的关键成分,我们展示了他们是如何受到影响时,调整的能带结构。我们还解决了这个问题的相关性的Berry曲率平坦度。使用三体相互作用,我们表明,一些模型也可以主机的拓扑相,让人想起nu=1/2 PfweanMoore-Read状态。此外,我们确定的结构表明集群相关的纠缠谱。

英文摘要:

We study four different models of Chern insulators in the presence of strong electronic repulsion at partial fillings. We observe that all cases exhibit a Laughlin-like phase at filling fraction 1/3. We provide evidence of such a strongly correlated topological phase by studying both the energy and the entanglement spectra. In order to identify the key ingredients of the emergence of Laughlin physics in these systems, we show how they are affected when tuning the band structure. We also address the question of the relevance of the Berry curvature flatness in this problem. Using three-body interactions, we show that some models can also host a topological phase reminiscent of the nu=1/2 Pfaffian Moore-Read state. Additionally, we identify the structures indicating cluster correlations in the entanglement spectra.

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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