Chiral Anomaly in Non-Relativistic Systems: Berry Curvature and Chiral Kinetic Theory

被引:8
|
作者
Gao, Lan-Lan [1 ,2 ]
Huang, Xu-Guang [1 ,2 ,3 ]
机构
[1] Fudan Univ, Phys Dept, Shanghai 200438, Peoples R China
[2] Fudan Univ, Ctr Particle Phys & Field Theory, Shanghai 200438, Peoples R China
[3] Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China
基金
中国国家自然科学基金;
关键词
TRANSPORT; COLLISIONS;
D O I
10.1088/0256-307X/39/2/021101
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Chiral anomaly and the novel quantum phenomena it induces have been widely studied for Dirac and Weyl fermions. In most typical cases, the Lorentz covariance is assumed and thus the linear dispersion relations are maintained. However, in realistic materials, such as Dirac and Weyl semimetals, the nonlinear dispersion relations appear naturally. We develop a kinetic framework to study the chiral anomaly for Weyl fermions with nonlinear dispersions using the methods of Wigner function and semi-classical equations of motion. In this framework, the chiral anomaly is sourced by Berry monopoles in momentum space and could be enhanced or suppressed due to the windings around the Berry monopoles. Our results can help understand the chiral anomaly-induced transport phenomena in non-relativistic systems.
引用
收藏
页数:7
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