Chiral current induced by torsional Weyl anomaly

Autor:	Chu, Chong-Sun, Miao, Rong-Xin
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics High Energy Physics - Theory
Zdroj:	Phys.Rev.B 107 (2023) 20, 205410
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.107.205410
Popis:	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. Comment: 15 pages, 1 figure, revision published in PRB
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2210.01382 Zobrazit plný text záznamu View this record from Arxiv