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Autor(en): Dressel, Martin
Eldridge, John E.
Wang, H. Hau
Geiser, Urs
Williams, Jack M.
Titel: Analysis of the infrared conductivity of the organic superconductor α-(BEDT-TTF)2(NH4)Hg(NCS)4
Erscheinungsdatum: 1992
Dokumentart: Zeitschriftenartikel
Erschienen in: Synthetic Metals 52 (1992), S. 201-211
URI: http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-46053
http://elib.uni-stuttgart.de/handle/11682/7034
http://dx.doi.org/10.18419/opus-7017
Zusammenfassung: An optical study of the α phase superconducting compound, α-(ET)2(NH4)Hg(NCS)4 has been performed. The absolute reflectivity of a deuterated crystal has been measured as a function of temperature and polarization, from which the conductivity was obtained. The overall shapes of these spectra are discussed and compared with those obtained from compounds of different phases. In particular we were able to perform a Drude fit of the low-temperature conductivity for one polarization, rather than of the reflectivity dip. The plasma frequency and damping were extracted and these yielded a reasonable effective mass and mean free path. The isotopic vibrational frequency shifts were obtained by repeating the measurements on a protonated sample, which was, however, too small to provide absolute data. The vibrational features are assigned and discussed.
Enthalten in den Sammlungen:15 Fakultätsübergreifend / Sonstige Einrichtung

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