General formula of chiral anomaly for type-I and type-II Weyl semimetals

Morishima, Kazuki; Kondo, Kenji

Applied physics letters, 2021, 119(13), 131907

Permalink : https://hdl.handle.net/2115/86821

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アクセス権
open access
URI
https://hdl.handle.net/2115/86821
タイトル
General formula of chiral anomaly for type-I and type-II Weyl semimetals
著者
著者名
Morishima, Kazuki
e-Rad_Researcher
50360946
著者名
Kondo, Kenji
言語
英語
発行日
2021-09-27
出版者
AIP Publishing
収録物名
Applied physics letters
巻(号)
119(13)
ページ
131907
抄録
Weyl semimetals (WSMs) are classified into type-I and type-II, depending on the magnitudes of the inclination of Weyl cones. It is known that these WSMs show negative longitudinal magnetoresistance originating from chiral anomaly. Moreover, we have recently revealed that type-II WSMs show positive longitudinal magnetoresistance originating from chiral anomaly. The negative longitudinal magnetoresistance in type-I WSMs can be explained utilizing the conventional formula of the chiral anomaly, which does not have the term related to the inclination of the Weyl cones. However, we cannot explain both the positive and the negative longitudinal magnetoresistance in type-II WSMs utilizing it. Therefore, in this paper, we derive the general formula including the term related to the inclination of the Weyl cones in order to explain straightforwardly the positive and the negative longitudinal magnetoresistance in type-II WSMs. Also, we consider both cases where a pair of the Weyl cones are tilted in the same direction (positive tilt chirality) and toward (or against) each other (negative tilt chirality) in order to investigate the influence of the direction to which the Weyl cones are tilted. As a result, we find that in the negative tilt chirality, the general formula is strongly affected by the inclination. These results suggest that we can estimate whether the WSMs show the positive or the negative longitudinal magnetoresistance using the general formula from the information of their tilt chirality and the magnitudes of the inclination of the Weyl cones.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in K. Morishima and K. Kondo , "General formula of chiral anomaly for type-I and type-II Weyl semimetals", Appl. Phys. Lett. 119, 131907 (2021) https://doi.org/10.1063/5.0059547 and may be found at https://doi.org/10.1063/5.0059547
PISSN
0003-6951
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出版社版DOI
https://doi.org/10.1063/5.0059547