Directional shift current in mirror-symmetric BC$_2$N
Mesoscale and Nanoscale Physics
2020-09-04 v2
Abstract
We present a theoretical study of the shift current in a noncentrosymmetric polytype of graphitic BCN. We find that the photoconductivity near the fundamental gap is strongly anisotropic due to the vanishing of particular tensor components not foretold by point-group symmetry arguments; this is a consequence of dipole selection rules imposed by mirror symmetry, which imply that the relative parities between valence and conduction bands are key for determining the directionality of the band-edge response. In addition, the band-edge photoconductivity turns out to be rather large, with the peak value occurring in an energy range suitable for optical manipulation
Cite
@article{arxiv.1906.07627,
title = {Directional shift current in mirror-symmetric BC$_2$N},
author = {J. Ibañez-Azpiroz and I. Souza and F. de Juan},
journal= {arXiv preprint arXiv:1906.07627},
year = {2020}
}
Comments
7 pages, 4 figures