Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Poster 2
MA 35.76: Poster
Donnerstag, 8. September 2022, 16:00–18:00, P4
Effects of the chiral anomaly on charge and heat transport in Weyl semimetals — •Alina Wenzel1,2, Annika Johansson1, and Ingrid Mertig2 — 1Max Planck Institute of Microstructure Physics, Halle, Germany — 2Martin Luther University Halle-Wittenberg, Halle, Germany
The chiral anomaly in Weyl semimetals, which corresponds to nonconservation of chiral charge if a magnetic field is applied nonorthogonal to an electric field or a temperature gradient, leads to unconventional contributions to longitudinal charge and thermal transport, strongly depending on the external magnetic field [1-3]. We calculate the thermoelectric transport properties for Weyl systems by solving the semiclassical Boltzmann equation including a temperature gradient. To analytically calculate the transport coefficients the Sommerfeld expansion is used. The isotropic Weyl Hamiltonian [2] and an anisotropic, more realistic model to describe pairs of Weyl points [4,5] are discussed. Using the latter, Weyl semimetals with either broken time reversal or inversion symmetry are simulated and the influence of symmetry on the electric and thermal transport properties is discussed.
[1] H. B. Nielsen and M. Ninomiya, Phys. Lett. B 130, 389 (1983)
[2] D. T. Son and B. Z. Spivak, Phys. Rev. B 88, 104412 (2013)
[3] K. Kim, Phys. Rev. B 90, 121108(R) (2014)
[4] S. Murakami et al., Phys. Rev. B 78, 165313 (2008)
[5] R. Okugawa et al., Phys. Rev. B 89, 235315 (2014)