...
首页> 外文期刊>Journal of the Physical Society of Japan >Streda Formula for the Hofstadter-Wilson-Dirac Model in Two and Four Dimensions
【24h】

Streda Formula for the Hofstadter-Wilson-Dirac Model in Two and Four Dimensions

机译:二维和四个维度的Hofstadter-Wilson-Dirac模型的Streda公式

获取原文
获取原文并翻译 | 示例
           

摘要

We rederive the spectral asymmetry of the Wilson - Dirac model in external fields, paying attention to the Chern number due to the Berry connection. We interpret the smooth part of the spectral asymmetry as the Streda formula that is originally derived for the two-dimensional quantum Hall effect (QHE). We show by numerical calculations that the Streda formula reproduces the known first and second Chern numbers in a weak magnetic field limit. We conjecture that the Streda formula is valid even for stronger fields and for more generic systems in higher dimensions.
机译:我们在外部场中重新引入了Wilson-Dirac模型的光谱不对称性,并注意由于Berry连接而产生的Chern数。我们将频谱不对称的平滑部分解释为最初为二维量子霍尔效应(QHE)导出的Streda公式。我们通过数值计算表明,Streda公式可在弱磁场极限下重现已知的第一和第二Chern数。我们推测,即使对于更强的字段和更高维度的更通用系统,Streda公式也是有效的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号