Probing mirror anomaly and classes of Dirac semimetals with circular dichroism
Mesoscale and Nanoscale Physics
2021-03-16 v2
Abstract
We theoretically investigate the optical activity of three dimensional Dirac semimetals (DSMs) using circular dichroism (CD). We show that DSMs in the presence of a magnetic field in any one of the mirror-symmetric planes of the materials exhibit a notable dichroic behavior. In particular, for different orientations of the light field with respect to the mirror-symmetric plane, the CD in type-II DSMs can detect the presence of mirror anomaly by showing sharply distinct patterns at the mirror-symmetric angle. Interestingly, CD can also distinguish type-II DSMs having only one Dirac point at a time-reversal invariant momentum from type-I DSMs with a pair of Dirac points on the rotation axis of the crystals.
Keywords
Cite
@article{arxiv.2004.14412,
title = {Probing mirror anomaly and classes of Dirac semimetals with circular dichroism},
author = {Abhirup Roy Karmakar and S. Nandy and G. P. Das and Kush Saha},
journal= {arXiv preprint arXiv:2004.14412},
year = {2021}
}
Comments
8 pages, 5 figures