Change of Hall conductance induced by band crossing

Ming Yi Lee, Ming Che Chang, Tzay Ming Hong

研究成果: 雜誌貢獻期刊論文同行評審

6 引文 斯高帕斯(Scopus)

摘要

We investigate the change of Hall conductance induced by band crossing in the Hofstadter spectrum. Numerical study shows that, if the magnetic flux is (Formula presented) flux quanta per plaquette, then the change of the Hall conductance is (Formula presented) or 0, depending on whether the energy dispersion near degenerate points is linear or quadratic. This is consistent with an earlier study by Bellissard (cond-mat/9504030, unpublished). We also find that the change of the Hall conductance is accompanied by the “transport” of a daughter subband between the degenerate parent bands. A semiclassical explanation of this subtle effect is offered.

原文英語
頁(從 - 到)11895-11898
頁數4
期刊Physical Review B - Condensed Matter and Materials Physics
57
發行號19
DOIs
出版狀態已發佈 - 1998

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學

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