Table of Contents
ISRN Condensed Matter Physics
Volume 2012, Article ID 732973, 21 pages
http://dx.doi.org/10.5402/2012/732973
Review Article

Electrodynamics of Bechgaard Salts: Optical Properties of One-Dimensional Metals

1. Physikaliisches Insitut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany

Received 21 June 2012; Accepted 10 July 2012

Academic Editors: H. Eisaki, I. Galanakis, H. D. Hochheimer, C. Homes, Y. Ohta, and J. Tempere

Copyright © 2012 Martin Dressel. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The electrodynamic properties of the quasi-one-dimensional organic conductors (TMTSF)2X are discussed, with particular emphasis on important deviations from the simple Drude model, the transition from a Luttinger-liquid to a Fermi-liquid behavior at the dimensional crossover when pressure is applied or temperature reduced, indications of a pseudogap as well as a low-frequency collective mode. Superconductivity and spin-density-wave ground states breaking the symmetry and gaps should occur in the excitation spectra. The previous literature is summarized and the current status of our understanding presented. Novel THz experiments on (TMTSF)2PF6 and (TMTSF)2ClO4 not only shine light into some of the open questions, but also pose new ones.