Three new superconducting members of the family of tetramethyltetraselenafulvalene (TMTSF) salts: TMTSF2CIO4, TMTSF2SbF6, TMTSF2TaF6

Abstract

Reports resistivity against temperature measurements along the high-conductivity a axis of TMTSF₂CIO₄, TMTSF₂SbF₆ and TMTSF₂TaF₆, under pressure and as a function of applied magnetic field, that show that all three compounds exhibit superconducting phase transitions near 1K, when sufficient pressure is applied. TMTSF₂SbF₆ and TMTSF₂TaF₆ become superconducting above critical pressures of approximately 10 and 11 kbar respectively whereas the authors observe a superconducting phase transition in TMTSF₂ClO₄ at much lower pressures (<3 kbar) they find that the critical pressure above which the SC phase is stabilised can be correlated with the separation between the sheets of TMTSF molecules and anions.