Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 21: Transport: Molecular Electronics (joint session TT/CPP/HL/MA)

CPP 21.1: Vortrag

Mittwoch, 13. März 2013, 09:30–09:45, H2

Inelastic scattering effects and electronic shot noise — •Amin Karimi, Markus Herz, and Elke Scheer — Department of Physics, University of Konstanz, 78457 Konstanz, Germany

The study of shot noise for junctions formed by single molecules offers interesting new information that cannot be easily obtained by other means. At low bias it allows determining the transmission probability and the number of current carrying conductance channels [1]. We investigate the effects of phonon scattering on the electronic current noise through nano junctions with mechanically controllable break junction (MCBJ). Equivalent measurements have recently been reported to be able to reveal inelastic transport contributions to the current through gold atomic contacts [2]. We developed a new and versatile measurement system enabling measurements of the noise in a rather broad range of conductance values from 0.01 G₀ to 1 G₀ without the necessity of double wiring. First results on gold atomic contacts and benzendithiol will be presented.
[1] D. Djukic and J. M. van Ruitenbeek, Nano Lett. 6, 789-793 (2006)
M. Kumar, R. Avriller and J. M. van Ruitenbeek, Phys. Rev. Lett. 108, 146602 (2012)