Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 63: Posters: Scanning Probe Methods

O 63.27: Poster

Mittwoch, 2. April 2014, 17:30–21:00, P2

Shot noise measurements at atomic contacts — •Andreas Burtzlaff, Alexander Weismann, and Richard Berndt — IEAP, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany

Transport in atomic contacts is commonly characterized by measuring the conductance, which is the sum of the contributions of a set of quantum states, the so called transport channels. From the conductance alone, those contributions cannot be disentangled. By measuring the current dependent noise of an atomic contact it is possible to gain information on the number of channels contributing to the transport process and their transmission probabilities. Previously this approach has been successfully applied to semiconductor heterostructures as well as molecules and atomic contacts in MCBJ experiments. We perform such noise measurements using an STM at 4K and under UHV conditions. Preliminary results for single atom contacts will be shown.