Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 32: Transport: Nanoelectronics III - Molecular Electronics 1
TT 32.8: Vortrag
Mittwoch, 28. März 2012, 17:00–17:15, BH 334
Optical response of a single-molecule junction: current switching, negative differential resistance and plasmon induced conductance enhancement — •Yaroslav Zelinskyy1,2 and Volkhard May1 — 1Institut für Physik, Humboldt Universität zu Berlin, Newtonstrasse 15, D-12489 Berlin, Germany — 2Bogolubov Institute for theoretical physics National Academy of Science of Ukraine, Metrologichna str. 14b, UA-03683, Kiev, Ukraine
Based on a generalized master equation approach the conductive properties of a current-carrying molecular junction driven by an external optical excitation are studied [1]. The description incorporates vibrational states of the molecule and related relaxation processes with the latter being crucial for the strength of the actual current. A photoinduced switch of the current, the
appearance of a negative differential resistance and its
photoinduced suppression are predicted [2]. The nano-electrode plasmon control of the single molecule conductivity appearing at the simultaneous optical excitation of the molecule and the electrodes is also considered [3]. A remarkable enhancement of the current is
achieved in this case.
L. Wang, V. May, Phys.Chem.Chem.Phys., 13, 8755 (2011).
Ya.R. Zelinskyy, E.G. Petrov, Ukr.J.Phys. 54, 707 (2009).
Y. Zelinskyy, V. May, Nano Lett. (submitted).