Optical Susceptibilities of Polymers: Current-Current versus Dipole-Dipole Correlation
Strongly Correlated Electrons
2007-05-23 v1 Optics
Abstract
The static current operator leads to definitional zero frequency divergence and unphysical results in studying nonlinear optical susceptibilities of polymers. A well-defined dipole-dipole correlation is superior to the complicated current-current correlation to solve this problem. As illustrative examples, optical susceptibilities under both SSH and TLM models of trans-(CH)_x are studied. New analytical results are obtained. The reasons of previous improper results are analyzed.
Keywords
Cite
@article{arxiv.cond-mat/9905406,
title = {Optical Susceptibilities of Polymers: Current-Current versus Dipole-Dipole Correlation},
author = {Minzhong Xu and Xin Sun},
journal= {arXiv preprint arXiv:cond-mat/9905406},
year = {2007}
}