| Summary: | 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.
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