Basis-Independent Spectral Methods for Non-linear Optical Response in Arbitrary Tight-binding Models
Other Condensed Matter
2021-02-04 v4
Abstract
In this paper, we developed a basis-independent perturbative method for calculating the non-linear optical response of arbitrary non-interacting tight-binding models. Our method is based on the non-equilibrium Keldysh formalism and allows an efficient numerical implementation within the framework of the Kernel Polynomial Method for systems which are not required to be translation-invariant. Some proof-of-concept results of the second-order optical conductivity are presented for the special case of gapped graphene with vacancies and an on-site Anderson disordered potential.
Cite
@article{arxiv.1810.03732,
title = {Basis-Independent Spectral Methods for Non-linear Optical Response in Arbitrary Tight-binding Models},
author = {S. M. João and J. M. V. P. Lopes},
journal= {arXiv preprint arXiv:1810.03732},
year = {2021}
}
Comments
13 pages, 13 figures