Magneto-conductivity of tilted type-I Weyl semimetals with different types of impurities

We theoretically study the longitudinal magneto-conductivity of tilted type-I Weyl semimetals with three different types of impurities via a two-node model with opposite chirality and tilt vector. The Landau level solutions suggest that the Fermi velocity of the zeroth Landau level is dressed by the...

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Bibliographic Details
Main Authors: Jianmei Shao, Lijuan Yan
Format: Article
Language:English
Published: AIP Publishing LLC 2019-04-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5091852
Description
Summary:We theoretically study the longitudinal magneto-conductivity of tilted type-I Weyl semimetals with three different types of impurities via a two-node model with opposite chirality and tilt vector. The Landau level solutions suggest that the Fermi velocity of the zeroth Landau level is dressed by the tilt and the angle between the magnetic field and the tilt direction. At low temperature and only considering the zeroth Landau level, we find that the magneto-conductivity σzz depends strongly on the tilt-dressed Fermi velocity and thus shows a strong angle dependence. This angle dependence of conductivity will be enhanced by the increase of the degree of tilt. Besides, the conductivity is very sensitive to impurities. σzz decreases with increasing impurity density and scattering strength, and it has different magnetic field dependence for different scattering potentials. For short-range delta scattering, it is independent of B. But for long-range random Gaussian potential and screened Coulomb potential, it may show a linear and quasi-quadratic dependence on B, respectively. These findings help us have a better understanding of the magneto-transport properties of the tilted type-I Weyl semimetals.
ISSN:2158-3226