Article Dans Une Revue Physical Review B: Condensed Matter (1978-1997) Année : 1985

Far-infrared spectrum of di-tetramethyltetraselenafulvalene hexafluoroarsenate [(TMTSF)2AsF6]

H.K. Ng
  • Fonction : Auteur
T. Timusk
  • Fonction : Auteur
D. Jérome
K. Bechgaard
  • Fonction : Auteur

Résumé

New results are presented on the far-infrared properties of the quasi-one-dimensional compound di-tetramethyltetraselenafulvalene hexafluoroarsenate [(TMTSF)2AsF6] below the spin-density-wave (SDW) transition temperature. The infrared conductivity is reduced at frequencies below 60 cm-1 but we do not observe a well-developed energy gap. A 5-cm-1-wide mode centered at zero frequency can be observed with a strength that is consistent with the freezing out of carriers below the SDW transition as observed by dc conductivity. There is no evidence of high metallic single-particle conductivity in our measurements above the transition temperature in the conducting state. A strong continuous absorption in the 50500-cm-1 region can be seen and we associate it with a Holstein absorption with a tr of 0.6, a value that is consistent with the temperature dependence of the dc conductivity.

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hal-04944347 , version 1 (20-03-2025)

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H.K. Ng, T. Timusk, D. Jérome, K. Bechgaard. Far-infrared spectrum of di-tetramethyltetraselenafulvalene hexafluoroarsenate [(TMTSF)2AsF6]. Physical Review B: Condensed Matter (1978-1997), 1985, 32 (12), pp.8041-8045. ⟨10.1103/PhysRevB.32.8041⟩. ⟨hal-04944347⟩
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