6533b7d3fe1ef96bd12612ea
RESEARCH PRODUCT
Probing the superconducting state of UPd2Al3 thin films by tunneling spectroscopy
S. MouloudMichael HuthMartin JourdanH. Adriansubject
SuperconductivityMaterials scienceCondensed matter physicsOxideEnergy Engineering and Power TechnologyConductivityHeavy fermion superconductorCondensed Matter PhysicsElectronic Optical and Magnetic Materialschemistry.chemical_compoundchemistryDensity of statesElectrical and Electronic EngineeringThin filmSpectroscopyQuantum tunnellingdescription
Abstract Giaever-type planar cross junctions of thin films of the heavy fermion superconductor UPd2Al3 and counter-electrodes of Au, Ag and Al were prepared. Tunneling barriers consisting of the native oxide layer of UPd2Al3 and artificial barriers of AlOx and UOx were investigated. The junctions without artificial barrier show a lack of reproducebility. On some junctions a BCS-like tunneling conductivity with a ratio of 2Δ 0 /k B T c ⋍ 3.8 was observed. Using oxidized Al deposited at room temperature as a barrier no substantial increase of the junction resistance occured. With Uraniumoxide a much higher resistance was obtained, but an association of the bias dependent junction conductivity with density of states effects was not possible up to now.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-08-01 | Physica C: Superconductivity |