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TT: Tiefe Temperaturen

TT 8: Correlated Electrons: Heavy Fermions

TT 8.1: Vortrag

Montag, 27. März 2006, 14:30–14:45, HSZ 301

Tunneling spectroscopy experiments on epitaxial UNi₂Al₃ thin films — •Andrey Zakharov, Martin Jourdan, and Hermann Adrian — Johannes Gutenberg-University, Institute of Physics, Staudinger Weg 7, 55128 Mainz, Germany

We are presenting the results of tunneling spectroscopy experiments performed on the heavy fermion superconductor UNi₂Al₃. Planar junctions consisting of an a*-axis oriented UNi₂Al₃ thin film as a base electrode, AlOx insulating layer and a metal counter electrode were prepared employing an in vacuo process. The MESA structures made by photolitography were investigated as well as simple cross-junctions. The observation of the well-known superconducting density of states of the counter electrode (Pb) allows the evaluation of the junction quality. The tunneling conductivity will be discussed in the framework of density of states and barrier effects.