Magnetic control of Weyl nodes and wave packets in three-dimensional warped semimetals
Abstract
We investigate the topological phase transitions driven by band warping and a transverse magnetic field, for three-dimensional Weyl semimetals. First, we use the Chern number as a mathematical tool to derive the topological phase diagram. Next, we associate each of the topological sectors to a given angular momentum state of a rotating wave packet. Then we show how the position of the Weyl nodes can be manipulated by a transverse external magnetic field that ultimately quenches the wave packet rotation, first partially and then completely, thus resulting in a sequence of field-induced topological phase transitions. Finally, we calculate the current-induced magnetization and the anomalous Hall conductivity of a prototypical warped Weyl material. Both observables reflect the topological transitions associated with the wave packet rotation and can help to identify the elusive 3D quantum anomalous Hall effect in three-dimensional, warped Weyl materials.
Keywords
Cite
@article{arxiv.2401.06282,
title = {Magnetic control of Weyl nodes and wave packets in three-dimensional warped semimetals},
author = {Bruno Focassio and Gabriel R. Schleder and Adalberto Fazzio and Rodrigo B. Capaz and Pedro V. Lopes and Jaime Ferreira and Carsten Enderlein and Marcello B. Silva Neto},
journal= {arXiv preprint arXiv:2401.06282},
year = {2024}
}
Comments
6 pages, 5 figures