外尔半金属中的手征涡旋效应

doi:10.7523/j.issn.2095-6134.2019.05.004

中国科学院大学学报 ›› 2019, Vol. 36 ›› Issue (5): 598-604.DOI: 10.7523/j.issn.2095-6134.2019.05.004

外尔半金属中的手征涡旋效应

吉轩廷¹, 朱振刚²

1. 中国科学院大学物理科学学院, 北京 100049;
2. 中国科学院大学电子电气与通信工程学院, 北京 100049

收稿日期:2018-04-28 修回日期:2018-05-15 发布日期:2019-09-15
通讯作者: 吉轩廷
基金资助:
国家自然科学基金面上项目（11674317）资助

Chiral vortical effect in Weyl semimetals

JI Xuanting¹, ZHU Zhen²

1. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
2. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2018-04-28 Revised:2018-05-15 Published:2019-09-15

摘要/Abstract

摘要： 实验表明，外尔半金属中不仅存在手征反常，也存在引力反常。引力反常会导致手征涡旋效应。因此，在外尔半金属中研究手征涡旋效应是必要的。作为石墨烯的三维类似物，外尔半金属也有可能出现强耦合。基于此，通过规范/引力对偶的方法研究强耦合下外尔半金属中的手征涡旋效应。在只考虑引力反常引起的手征涡旋效应的情形下，得到如下结论：1）手征涡旋效应可以由引力反常引起，在具有手征费米子的外尔半金属中存在，且与耦合强度成正比；2）手征涡旋效应与温度平方成正比。

关键词: 外尔半金属, 手征反常, 引力反常, 手征涡旋效应

Abstract: As the experiments indicate, not only the chiral anomaly but also the gravitational anomaly exist in Weyl semimetal. Gravitational anomaly induces the chiral vortical effect. Hence it is necessary to study the chiral vortical effect in Weyl semimetal. Furthermore, due to the analogy to the graphene, Weyl semimetal may also suffer strong coupling. Based on this, we study the chiral vortical conductivity in a strong coupling Weyl semimetal by AdS/CFT. Under the circumstance where only gravitational anomaly is considered, we obtain the conclusions as follows. 1)Gravitational anomaly induces the chiral vortical effect, which exists in the Weyl semimetal equipped with the chiral fermions, and it is proportional to the coupling strength. 2)Chiral vortical conductivity is proportional to square of temperature.

Key words: Weyl semimetal, chiral anomaly, gravitational anomaly, chiral vortical effect

中图分类号:

O412
O469

吉轩廷, 朱振刚. 外尔半金属中的手征涡旋效应[J]. 中国科学院大学学报, 2019, 36(5): 598-604.

JI Xuanting, ZHU Zhen. Chiral vortical effect in Weyl semimetals[J]. , 2019, 36(5): 598-604.

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外尔半金属中的手征涡旋效应

Chiral vortical effect in Weyl semimetals

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