TY - JOUR

T1 - Quantum transport in three-dimensional Weyl electron system in the presence of charged impurity scattering

AU - Ominato, Yuya

AU - Koshino, Mikito

N1 - Publisher Copyright:
© 2015 American Physical Society.

PY - 2015/1/26

Y1 - 2015/1/26

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevB.91.035202

DO - 10.1103/PhysRevB.91.035202

M3 - Article

AN - SCOPUS:84921779122

VL - 91

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

SN - 0163-1829

IS - 3

M1 - 035202

ER -