Spin-density-wave gap in the Bechgaard salts (TMTSF)2X

V. Vescoli, L. Degiorgi, M. Dressel, A. Schwartz, W. Henderson, B. Alavi, G. Grüner, J. Brinckmann, A. Virosztek

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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.

Original languageEnglish
Pages (from-to)8019-8027
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number11
Publication statusPublished - Jan 1 1999


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Vescoli, V., Degiorgi, L., Dressel, M., Schwartz, A., Henderson, W., Alavi, B., Grüner, G., Brinckmann, J., & Virosztek, A. (1999). Spin-density-wave gap in the Bechgaard salts (TMTSF)2X. Physical Review B - Condensed Matter and Materials Physics, 60(11), 8019-8027. https://doi.org/10.1103/PhysRevB.60.8019