Chiral magnetic effect in the absence of Weyl node

Ming Che Chang, Min Fong Yang

研究成果: 雜誌貢獻文章

22 引文 斯高帕斯(Scopus)

摘要

The nodal points in a Weyl semimetal are generally considered as the causes of the chiral anomaly and the chiral magnetic effect (CME). Employing a linear-response analysis of a two-band lattice model, we show that the Weyl nodes and thus the chirality are not required for the CME, while they remain crucial for the chiral anomaly. Similar to the anomalous Hall effect, the CME results directly from the Berry curvature of energy bands, even when there is no monopole source from the Weyl nodes. Therefore, the phenomenon of the CME could be observed in a wider class of materials. Motivated by this result, we suggest that the nodeless CME may appear in three-dimensional quantum anomalous Hall insulators, but after they become metallic due to the band deformation caused by inversion symmetry breaking.

原文英語
文章編號205201
期刊Physical Review B - Condensed Matter and Materials Physics
92
發行號20
DOIs
出版狀態已發佈 - 2015 十一月 4

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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