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Chiral current induced by torsional Weyl anomaly
- Source :
- Phys.Rev.B 107 (2023) 20, 205410
- Publication Year :
- 2022
-
Abstract
- Torsion can be realized as dislocation in the crystal lattice of material. It is particularly interesting if the material has fermions in the spectrum, such as graphene, topological insulators, Dirac and Weyl semimetals, as it's transport properties can be affected by the torsion. In this paper, we find that, due to Weyl anomaly, torsion in Dirac and Weyl semimetals can induce novel chiral currents, either near a boundary or in a ``conformally flat space''. We briefly discuss how to measure this interesting effect in experiment. It is remarkable that these experiments can help to clarify the theoretical controversy of whether an imaginary Pontryagin density could appear in the Weyl anomaly.<br />Comment: 15 pages, 1 figure, revision published in PRB
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
High Energy Physics - Theory
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys.Rev.B 107 (2023) 20, 205410
- Publication Type :
- Report
- Accession number :
- edsarx.2210.01382
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.107.205410