Quantum transport in three-dimensional Weyl electron system in the presence of charged impurity scattering

Yuya Ominato, Mikito Koshino

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

We theoretically study the quantum transport in a three-dimensional Weyl electron system in the presence of the charged impurity scattering using a self-consistent Born approximation. The scattering strength is characterized by the effective fine-structure constant α, which depends on the dielectric constant and the Fermi velocity of the linear band. We find that the Boltzmann theory fails at the band touching point, where the conductivity takes a nearly constant value almost independent of α, even though the density of states linearly increases with α. There the magnitude of the conductivity only depends on the impurity density. The qualitative behavior is quite different from the case of the Gaussian impurities, where the minimum conductivity vanishes below a certain critical impurity strength.

Original languageEnglish
Article number035202
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number3
DOIs
Publication statusPublished - 2015 Jan 26

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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