Topological Invariants of Metals and Related Physical Effects
Mesoscale and Nanoscale Physics
2013-05-06 v1 Strongly Correlated Electrons
Abstract
The total reciprocal space magnetic flux threading through a closed Fermi surface is a topological invariant for a three-dimensional metal. For a Weyl metal, the invariant is non-zero for each of its Fermi surfaces. We show that such an invariant can be related to magneto-valley-transport effect, in which an external magnetic field can induce a valley current. We further show that a strain field can drive an electric current, and the effect is dictated by a second class Chern invariant. These connections open the pathway to observe the hidden topological invariants in metallic systems.
Keywords
Cite
@article{arxiv.1211.0772,
title = {Topological Invariants of Metals and Related Physical Effects},
author = {Jianhui Zhou and Hua Jiang and Qian Niu and Junren Shi},
journal= {arXiv preprint arXiv:1211.0772},
year = {2013}
}
Comments
4 pages,2 figures