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.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Aug 1 2005|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics