Chiral Wave-packet Scattering in Weyl Semimetals
Abstract
In quantum mechanics, a particle is best described by the wave packet instead of the plane wave. Here, we study the wave-packet scattering problem in Weyl semimetals with the low-energy Weyl fermions of different chiralities. Our results show that the wave packet acquires a chirality-protected shift in the single impurity scattering process. More importantly, the chirality-protected shift can lead to an anomalous scattering probability, thus, affects the transport properties in Weyl semimetals. We find that the ratio between the transport lifetime and the quantum lifetime increases sharply when the Fermi energy approaches to the Weyl nodes, providing an explanation on the experimentally observed the ultrahigh mobility in topological (Weyl or Dirac) semimetals.
Keywords
Cite
@article{arxiv.1601.07297,
title = {Chiral Wave-packet Scattering in Weyl Semimetals},
author = {Qing-Dong Jiang and Hua Jiang and Haiwen Liu and Qing-Feng Sun and X. C. Xie},
journal= {arXiv preprint arXiv:1601.07297},
year = {2016}
}