Thermoelectric Hall conductivity and figure of merit in Dirac/Weyl materials

The authors study theoretically thermoelectric transport of three-dimensional Dirac/Weyl materials under a magnetic field. They find that at large field the thermoelectric Hall conductivity acquires a constant, quantized value that is independent of magnetic field, carrier density, or disorder. This quantization results from chiral Landau levels of Dirac/Weyl electrons and enables an unprecedented growth in the thermopower and the thermoelectric figure of merit.