Regensburg 2025 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 27: Transport in Materials: Diffusion, Charge or Heat Conduction

MM 27.10: Talk

Thursday, March 20, 2025, 12:45–13:00, H22

Transport coefficients of Weyl semimetals: the contribution of plasmons — •Kitinan Pongsangangan — Mahidol University, Bangkok, Thailand

This work investigates the contribution of plasmon, a collective mode arising from the dynamical screening of the long-range coulomb interaction, to thermo-electric responses as well as shear viscosity of Weyl semimetals using Boltzmann-equation approach. We find that plasmons make a noticeable contribution to the thermal conductivity and shear viscosity in an appropriate temperature window. We propose that this effect could be potentially observed in, for example, TaAs and NbAs.

Keywords: Weyl semimetals; heat transport; shear viscosity; Boltzmann equation; plasmons