Berlin 2005 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 23: Posters Superconductivity, Solids at Low Temperature
TT 23.49: Poster
Montag, 7. März 2005, 14:00–18:00, Poster TU D
A LT-STM for spectroscopy on finite superconducting proximity structures — •Christian Debuschewitz, Frank Münstermann, Vojko Kunej, and Elke Scheer — Department of Physics, University of Konstanz, 78457 Konstanz
We present a low temperature STM for spectroscopy on finite superconducting proximity structures. The nonmagnetic STM head is based on a slip-stick coarse approach and works in a conventional 3He cryostat at T=240 mK and a magnetic field up to 1 T. All electrical lines are radio-frequency filtered at low temperature in order to achieve the required energy resolution. For the determination of the energy resolution we measure the superconducting gap of aluminium at 240 mK. The proximity sturcture is fabricated by e-beam lithography and consists of normal metal islands (Au) on top of a superconducting plane (Al).