Kagome晶格中的拓扑平带和量子霍尔效应

徐雷; 张蓓; 孔维新; 陈楚; 张军

doi:10.13568/j.cnki.651094.2018.02.001

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Kagome晶格中的拓扑平带和量子霍尔效应

研究精粹 | 更新时间：2026-01-21

- Kagome晶格中的拓扑平带和量子霍尔效应
- Kagome晶格中的拓扑平带和量子霍尔效应
- 新疆大学学报（自然科学版中英文） 2018年35卷第2期页码：127-130
- 作者机构：
  
  新疆大学物理科学与技术学院
- 作者简介：
- 基金信息：
  
  新疆维吾尔自治区自然科学基金面上项目(2014211A003)
- DOI：10.13568/j.cnki.651094.2018.02.001
  中图分类号： O469
- 纸质出版：2018
- 稿件说明：
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[1]徐雷,张蓓,孔维新,等.Kagome晶格中的拓扑平带和量子霍尔效应[J],2018,35(02):127-130+136.
[1]徐雷,张蓓,孔维新,等.Kagome晶格中的拓扑平带和量子霍尔效应[J],2018,35(02):127-130+136. DOI： 10.13568/j.cnki.651094.2018.02.001.

DOI：10.13568/j.cnki.651094.2018.02.001.

摘要

本文采用紧束缚模型研究Kagome晶格中的拓扑平带.通过调控交错磁通和次近邻跃迁强度可以得到具有大带隙且Chern数为非零的近平带结构.由于拓扑平带与二维Landau能级的相似性

所以此拓扑非平庸的平带可以产生整数量子霍尔态

再加上相互作用还可能产生分数量子霍尔态.

Abstract

We study the topological flat band via tight-binding model in the Kagome lattice. A suitable combination of staggered flux and next nearest neighbor hopping can result in nearly flatband with a large band gap and nonzero Chern number. Because of the similarity with two-dimensional Landau levels

this topologically nontrivial nearly flatband can give rise to integer quantum Hall states and also may lead to fractional quantum Hall states by adding interactions.

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references

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