Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
Pressure dependence of the electronic properties of the quasi-two-dimensional organic superconductor beta"-(ET)2SF5CH2CF2SO3
Hagel, J.; Ignatchik, O.; Wosnitza, J.; Pfleiderer, C.; Schlueter, J. A.; Davis, H.; Winter, R.; Gard, G. L.
We report on pressure-dependent superconducting and transport properties of the quasi-two-dimensional organic superconductor b"-(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 λ, the pressure dependence of Tc can be well described by the modified McMillan equation. For all pressures in the metallic state the resistance follows q = q0 + AT2 at low temperatures. The coefficient A, however, is found to be not proportional to m2
c as expected for a purely electronic origin of the T2 behavior.
- Physica C 460-462(2007), 639-640