Far-Infrared Studies of Di-Tetramethyltetr Aselenafulvalium Salts

1 March 1985

journal article
research article
Published by Taylor & Francis in Molecular Crystals and Liquid Crystals

Vol. 119 (1) , 191-200
https://doi.org/10.1080/00268948508075157

Abstract

A detailed far-infrared study of two TMTSF compounds, CIO₄ and SbF₆ is presented. In the metallic state, the overall conductivity σ₁(ω) can be characterized by two relaxation times, a very long lifetime T_C.(>10⁻¹¹ _s) associated with the dc conductivity and a frequency dependent scattering time Tp due to phonons. The first lifetime is associated with the ‘zero frequency mode’ which has an effective mass M* of 250-650 m* while the second is due to Holstein volume process. In the spin density wave state, gaps of 20 cm⁻¹ and 180 cm^−Iwere observed for the C1O₄ and SbFg compounds respectively.

Keywords

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