Berlin 2008 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 15: Superconductivity: Poster Session

TT 15.41: Poster

Dienstag, 26. Februar 2008, 14:00–18:00, Poster B

Different transport mechanisms across semiconductor junctions — •Barbara Sandow¹, Dirk Brossell¹, and Walter Schirmacher² — ¹Institut für Experimentalphysik, Freie Universität Berlin, Germany — ²Physik-Department E13, Technische Universität München, Germany

We used break-junction tunnelling spectroscopy to investigate the Coulomb correlation in n-type Germanium. The Charge transport across break-junctions of n-type Germanium has been investigated. The low-T spectra of our Ge break junctions vary systematically with contact size. However, it is not always clear what kind of processes dominate the spectra of those contacts. We show how to identify and separate the different transport mechanisms across the junctions, necessary to derive the Density of states.