Pressure Dependence of the Electronic Properties of the Quasi-Two-Dimensional Organic Superconductor $B″$-({{ET}}){{2SF5CH2CF2SO3}}

We report on pressure-dependent superconducting and transport properties of the quasi-two-dimensional organic superconductor $\beta″$-(ET)2SF5CH2CF2SO3. With increasing pressure both the superconducting transition temperature, Tc, as well as the effective mass, mc, decrease monotonously. By assuming a direct relationship between mc and the superconducting coupling parameter $\lambda$, the pressure dependence of Tc can be well described by the modified McMillan equation. For all pressures in the metallic state the resistance follows $̊ho$=$̊ho$0+AT2 at low temperatures. The coefficient A, however, is found to be not proportional to mc2 as expected for a purely electronic origin of the T2 behavior.     «

We report on pressure-dependent superconducting and transport properties of the quasi-two-dimensional organic superconductor $\beta″$-(ET)2SF5CH2CF2SO3. With increasing pressure both the superconducting transition temperature, Tc, as well as the effective mass, mc, decrease monotonously. By assuming a direct relationship between mc and the superconducting coupling parameter $\lambda$, the pressure dependence of Tc can be well described by the modified McMillan equation. For all pressures in the...     »