Pressure-induced superconductivity in (MDT-TS) (AuI2) 0.441 [MDT-TS = 5H-2-(1,3-diselenol-2-ylidene)-1,3,4,6- tetrathiapentalene]: A new organic superconductor possessing an incommensurate anion lattice

Kazuo Takimiya, Mie Kodani, Naoto Niihara, Yoshio Aso, Tetsuo Otsubo, Yoshimasa Bando, Tadashi Kawamoto, Takehiko Mori

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20 Citations (Scopus)

Abstract

A selenium-containing TTF-type electron donor, MDT-TS [5H-2-(1,3-diselenol- 2-ylidene)-1,3,4,6-tetrathiapentalene] was effectively synthesized by a two-step reaction and utilized for electrocrystallization with an AuI2 - anion. The resulting salt, (MDT-TS)(AuI2) 0.441, has a unique crystal packing, in which the donor subcell and the anion lattice are incommensurate. Although the salt has relatively high conductivity at room temperature (600 S cm-1), it showed a metal-insulator (MI) transition at TMI = 50 K. Application of hydrostatic pressure suppressed the MI transition, and at 11.4 kbar (MDT-TS)(AuI2)0.441 showed a superconducting transition at Tc = 4.7 K.

Original languageEnglish
Pages (from-to)5120-5123
Number of pages4
JournalChemistry of Materials
Volume16
Issue number24
Publication statusPublished - 2004 Nov 30
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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