Universal Features of Terahertz Absorption in Disordered Materials
Disordered Systems and Neural Networks
2009-11-11 v1
Abstract
Using an analytical theory, experimental terahertz time-domain spectroscopy data and numerical evidence, we demonstrate that the frequency dependence of the absorption coupling coefficient between far-infrared photons and atomic vibrations in disordered materials has the universal functional form, C(omega) = A + B*omega^2, where the material-specific constants A and B are related to the distributions of fluctuating charges obeying global and local charge neutrality, respectively.
Cite
@article{arxiv.cond-mat/0604205,
title = {Universal Features of Terahertz Absorption in Disordered Materials},
author = {S. N. Taraskin and S. I. Simdyankin and S. R. Elliott and J. R. Neilson and T. Lo},
journal= {arXiv preprint arXiv:cond-mat/0604205},
year = {2009}
}
Comments
5 pages, 3 figs