Year: 2020
Type: article
Abstract: Torsional strain in Weyl semimetals excites a unidirectional chiral density wave propagating in the direction of the torsional vector. This gapless excitation, named the chiral sound wave, is generated by a particular realization of the axial anomaly via the triple-axial (AAA) anomalous diagram. We show that the presence of the torsion-generated chiral sound leads to a linear behavior of the specific heat of a Weyl semimetal and to an enhancement of the thermal conductivty at experimentally accessible temperatures. We also demonstrate that such an elastic twist lowers the temperature of the sample, thus generating a new, anomalous type of elasto-calorific effect. Measurements of these thermodynamical effects will provide experimental verification of the exotic triple-axial anomaly as well as the reality of the elastic pseudomagnetic fields in Weyl semimetals.
Source: SciPost Physics Core
Authors: matteo Baggioli, Maxim N. Chernodub, Karl Landsteiner, Maria Vozmediano
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: Comunidad de Madrid, Ministerio de Ciencia, Innovación y Universidades, Ministerio de Educación, Cultura y Deporte, Secretaría de Estado de Investigacion, Desarrollo e Innovacion, Ministry of Education and Science of the Russian Federation, Conseil National de la Recherche Scientifique, Ministerio de Educación y Cultura, Agencia Estatal de Investigación
OpenAlex ID: W3014596056