Physical Review Letters
We present here direct calorimetric evidence for a new transition at T*=22.25 K in the metallic state of quasi-2D organic superconductor -(BEDT-TTF)2I3 at ambient pressure, as suggested by our previous measurement of the temperature-dependent Hall coefficient RH(T). The apparent reduction in the effective electronic density of states at T* quantitatively explains for the first time the suppression of Tc from the pressure-stabilized eehigh-Tcee value of 8 K to the ambient-pressure cooled eelow-Tcee value of 1.5 K.
© 1992 The American Physical Society.
Fortune, Nathanael A.; Murata, K.; Ikeda, K.; and Takahashi, T., "Competition Between Superconductivity and a New 20 K Phase in -(BEDT-TTF)2I3: Specific Heat Measurements" (1992). Physics: Faculty Publications, Smith College, Northampton, MA.