Thermopower in an anisotropic two-dimensional Weyl semimetal
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Original versionMandal, I., Saha, K. (2020) Thermopower in an anisotropic two-dimensional Weyl semimetal. Physical Review B, 101(4) https://doi.org/10.1103/PhysRevB.101.045101
We investigate the generation of an electric current from a temperature gradient in a two-dimensional Weyl semimetal with anisotropy in both the presence and absence of a quantizing magnetic ﬁeld. We show that the anisotropy leads to doping dependences of thermopower and thermal conductivities which are different from those in isotropic Dirac materials. Additionally, we ﬁnd that a quantizing magnetic ﬁeld in such systems leads to an interesting magnetic ﬁeld dependence of the longitudinal thermopower, resulting in unsaturated thermoelectric coefﬁcients. Thus, the results presented here will serve as a guide to achieving high thermopower and a thermoelectric ﬁgure of merit in graphene-based materials, as well as organic conductors such as α-BEDT-TTF2I3.