The electrodynamic response of the organic linear chain Bechgaard salts (TMTSF)2X (X=PF6 and ClO4) has been investigated over a very broad spectral range by applying a variety of optical spectroscopic tools. We focus our attention on the spin-density-wave ground state and, in particular, on its manifestation in the optical properties, with polarization perpendicular to the chains. Along this direction, we have clearly identified the spin-density-wave gap in the optical spectra of both compounds. We discuss the single particle excitation across the gap within a formalism similar to the one worked out for the superconducting state, but with Bardeen-Cooper-Schrieffer case I coherence factors, as well as an approach based on the two-dimensional Hubbard model.
|Number of pages||9|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Jan 1 1999|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics