Magnetic control of Weyl nodes and wave packets in three-dimensional warped semimetals
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arXiv
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| Format: | Preprint |
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2024
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| author | Focassio, Bruno Schleder, Gabriel R. Fazzio, Adalberto Capaz, Rodrigo B. Lopes, Pedro V. Ferreira, Jaime Enderlein, Carsten Neto, Marcello B. Silva |
| author_facet | Focassio, Bruno Schleder, Gabriel R. Fazzio, Adalberto Capaz, Rodrigo B. Lopes, Pedro V. Ferreira, Jaime Enderlein, Carsten Neto, Marcello B. Silva |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_06282 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Magnetic control of Weyl nodes and wave packets in three-dimensional warped semimetals Focassio, Bruno Schleder, Gabriel R. Fazzio, Adalberto Capaz, Rodrigo B. Lopes, Pedro V. Ferreira, Jaime Enderlein, Carsten Neto, Marcello B. Silva Mesoscale and Nanoscale Physics Strongly Correlated Electrons High Energy Physics - Theory 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. |
| title | Magnetic control of Weyl nodes and wave packets in three-dimensional warped semimetals |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons High Energy Physics - Theory |
| url | https://arxiv.org/abs/2401.06282 |