Thermoelectric transport in torsional strained Weyl semimetals*

We recently¹ studied the electronic transport properties in Weyl semimetals submitted to the combined eects of torsional mechanical strain and magnetic field, showing that this conguration induces a node-polarization eect on the current that can be used to measure the torsion angle from transmission experiments. In this talk, we extend our previous work to study thermoelectric transport in Weyl
semimetals² (WSM) under torsional strain and an external magnetic field. We provide exact analytical expressions for the transmitted heat current, in order to calculate the thermal conductance and the Seebeck coefficient under this conguration. Our results suggest that thermoelectric transport coefficients in these materials can be engineered by appropriately tuning the magnitude of the magnetic field, torsional strain and the applied bias or thermal gradient, leading to a potentially very high figure of merit.

References
[1] R. Soto-Garrido and E. Muñoz, J. Phys.: Condens. Matter 30, 195302 (2018).
[2] E. Muñoz and R. Soto-Garrido, J. Appl. Phys. (submitted) (2018). arXiv:1809.10291