2022/05/27 by A. Moradpouri, Moradpouri, A., Mahdi Torabian +3
Physics and Astronomy · Materials Science · #Topological Materials and Phenomena #Graphene research and applications #Quantum Mechanics and Non-Hermitian Physics
paper · pdf · doi:10.48550/arxiv.2205.14175
We formulate the Boltzmann kinetic equations for interacting tilted Dirac fermions in two space dimensions characterized by a tilt parameter 0≤ζ<1. Solving the linearized Boltzmann equation, we find that the broadening of the Drude pole is enhanced by κ(ζ)×(1-ζ2)-1/2, where the κ is interaction-induced enhancement factor. The intensity of the Drude pole is also anisotropically enhanced by (1-ζ2)-1. The ubiquitous "redshift" factors (1-ζ2)1/2 can be regarded as a manifestation of an underlying spacetime structure in such solids. The additional broadening κ indicates that interaction effects are more pronounced for electrons in a ζ-deformed Minkowski spacetime of tilted Dirac fermions.