Optical, spin-resonance, and magnetoresistance studies of (tetrathiatetracene)2(iodide)3. the nature of the ground state

R. B. Somoano, S. P.S. Yen, V. Hadek, S. K. Khanna, M. Novotny, T. Datta, A. M. Hermann, John A. Woollam

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Abstract

Optical, spin resonance, and high-field magnetoresistance studies of the organic charge-transfer salt (tetrathiatetracene)2(iodide)3 [(TTT)2I3] have been carried out. This material is a single-carrier system consisting of segregated linear chains of TTT cation radicals and tri-iodide ions which are incommensurate with respect to each other. The I3- chains exhibit considerable disorder perpendicular to the chain axis. (TTT)2I3 has a high room-temperature conductivity (300°K)1000 -1cm-1 along the chain axis and is metallic down to 100°K where a possible phase transition occurs. The nature of this transition is discussed. Below 30°K, (TTT)2I3 exhibits semiconducting properties indicating that the low-temperature ground state is nonmetallic.

Original languageEnglish (US)
Pages (from-to)2853-2857
Number of pages5
JournalPhysical Review B
Volume17
Issue number7
DOIs
StatePublished - Jan 1 1978

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ASJC Scopus subject areas

  • Condensed Matter Physics

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