Nonlinear optical responses of crystalline systems: Results from a velocity gauge analysis
Other Condensed Matter
2018-07-04 v2
Abstract
In this work, the difficulties inherent to perturbative calculations in the velocity gauge are addressed. In particular, it is shown how calculations of nonlinear optical responses in the independent particle approximation can be done to any order and for any finite band model. The procedure and advantages of the velocity gauge in such calculations are described. The addition of a phenomenological relaxation parameter is also discussed. As an illustration, the nonlinear optical response of monolayer graphene is numerically calculated using the velocity gauge.
Keywords
Cite
@article{arxiv.1712.04924,
title = {Nonlinear optical responses of crystalline systems: Results from a velocity gauge analysis},
author = {D. J. Passos and G. B. Ventura and J. M. Viana Parente Lopes and J. M. B. Lopes dos Santos and N. M. R. Peres},
journal= {arXiv preprint arXiv:1712.04924},
year = {2018}
}