Inhaltszusammenfassung

The preparation and superconducting and transport properties of thin films of the heavy fermion superconductor CeCu2Si2 are reported. Superconductivity with onset temperatures above 600 mK was observed. The resistively measured temperature dependence of the upper critical field could be self-consistently fitted by Werthamer-Helfand-Hohenberg-theory with a Maki parameter ? ? 20 and a spin-orbit scattering parameter ?SO ? 6. The electrical resistivity was measured up to 300 K revealing characte...The preparation and superconducting and transport properties of thin films of the heavy fermion superconductor CeCu2Si2 are reported. Superconductivity with onset temperatures above 600 mK was observed. The resistively measured temperature dependence of the upper critical field could be self-consistently fitted by Werthamer-Helfand-Hohenberg-theory with a Maki parameter ? ? 20 and a spin-orbit scattering parameter ?SO ? 6. The electrical resistivity was measured up to 300 K revealing characteristic structures slightly more pronounced than is known from bulk material and a clear T2 behavior below 2 K. The formation of heavy quasiparticles at low temperature appears to be also the origin of the measured unusual temperature dependences of the Hall-effect and magnetoresistance. » weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik