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 ╬╗, 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

Publ.-Id: 10622