Charge ordering and pressure-induced superconductivity in β″ - (DODHT)2 P F6

H. Nishikawa, Y. Sato, K. Kikuchi, T. Kodama, I. Ikemoto, J. Yamada, H. Oshio, R. Kondo, S. Kagoshima

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32 Citations (Scopus)

Abstract

Transport measurements of a pressure-induced organic superconductor, β″ - (DODHT)2 P F6 [DODHT= (1,4-dioxane-2,3-diyldithio) dihydrotetrathiafulvalene], were performed under various pressures to obtain a pressure-temperature phase diagram. The pressure application of 13.2 kbar induced superconductivity at 2.3 K. Due to a fractional existence of superconductivity, a resistive state was observed with decreasing temperature in a narrow pressure range above 13.2 kbar. X-ray and magnetic measurements at ambient pressure revealed that the insulating state has a charge disproportionation, or a charge ordering (CO) state, with stripes along the molecular side-by-side direction. These results suggest that the charge fluctuation may play a crucial role in the superconductivity in β″ - (DODHT)2 P F6.

Original languageEnglish
Article number052510
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number5
DOIs
Publication statusPublished - Aug 1 2005
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Nishikawa, H., Sato, Y., Kikuchi, K., Kodama, T., Ikemoto, I., Yamada, J., Oshio, H., Kondo, R., & Kagoshima, S. (2005). Charge ordering and pressure-induced superconductivity in β″ - (DODHT)2 P F6. Physical Review B - Condensed Matter and Materials Physics, 72(5), [052510]. https://doi.org/10.1103/PhysRevB.72.052510