Optical absorption edge in one-dimensional conductors
Condensed Matter
2007-05-23 v1
Abstract
The frequency-dependent conductivity is studied for both the one-dimensional Hubbard model and a model of spinless fermions, using a selection rule, the Bethe ansatz energy eigenstates, and conformal invariance. For densities where the system is metallic the absorption spectrum has two contributions, a Drude peak at \omega = 0 separated by a pseudo-gap from a broad absorption band whose lower edge is characterized by a non-classical critical exponent. Our findings are expected to shed new light on the ``far infrared puzzle'' of metallic organic chain compounds.
Cite
@article{arxiv.cond-mat/9805043,
title = {Optical absorption edge in one-dimensional conductors},
author = {J. M. P. Carmelo and P. D. Sacramento and N. M. R. Peres and D. Baeriswyl},
journal= {arXiv preprint arXiv:cond-mat/9805043},
year = {2007}
}
Comments
4 pages, 2 columns, 2 figs