Inhaltszusammenfassung

Ramp-type YBa2Cu3O7/PrBa2Cu3O7/YBa2Cu3O7 tunneling junctions have been prepared by laser ablation. The voltage dependence of one differential conductance is measured at different temperatures and magnetic fields. The junctions are thermally stable and can be cooled down to liquid-helium temperature and warmed up again to room temperature several times without quality loss. At temperatures below 35 K they show clear indications of an energy gap and in the same temperature range a very sharp ze...Ramp-type YBa2Cu3O7/PrBa2Cu3O7/YBa2Cu3O7 tunneling junctions have been prepared by laser ablation. The voltage dependence of one differential conductance is measured at different temperatures and magnetic fields. The junctions are thermally stable and can be cooled down to liquid-helium temperature and warmed up again to room temperature several times without quality loss. At temperatures below 35 K they show clear indications of an energy gap and in the same temperature range a very sharp zero-bias anomaly. » weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
Physik der kondensierten Materie

DDC Sachgruppe:
Physik