Pseudomagnetic helicons
Abstract
The existence of pseudomagnetic helicons is predicted for strained Dirac and Weyl materials. The corresponding collective modes are reminiscent of the usual helicons in metals in strong magnetic fields but can exist even without a magnetic field due to a strain-induced background pseudomagnetic field. The properties of both pseudomagnetic and magnetic helicons are investigated in Weyl matter using the formalism of the consistent chiral kinetic theory. It is argued that the helicon dispersion relations are affected by the electric and chiral chemical potentials, the chiral shift, and the energy separation between the Weyl nodes. The effects of multiple pairs of Weyl nodes are also discussed. A simple setup for experimental detection of pseudomagnetic helicons is proposed.
Cite
@article{arxiv.1612.06397,
title = {Pseudomagnetic helicons},
author = {E. V. Gorbar and V. A. Miransky and I. A. Shovkovy and P. O. Sukhachov},
journal= {arXiv preprint arXiv:1612.06397},
year = {2017}
}
Comments
19 pages, 6 multipanel figures; published version with new section IV on Weyl/Dirac materials with multiple pairs of Weyl nodes