Regensburg 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 34: Transport: Molecular Electronics (jointly with CPP, HL, MA)
TT 34.3: Vortrag
Mittwoch, 13. März 2013, 10:00–10:15, H2
Charge transmission through a molecular junction driven by a time–dependent voltage — •Yaroslav Zelinskyy1,2, Yoram Selzer3, 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, 14-b Metrologichna str., UA-03683, Kiev, Ukraine — 3School of Chemistry, Tel Aviv University, Ramat Aviv, 69978 Tel Aviv, Israel
Time-dependent electron transport through a molecular junction driven by voltage
pulses with a duration even in the sub-ps region is investigated theoretically.
The transient behavior of the current is analyzed in focusing on the sequential transport regime
and in utilizing a density matrix approach. As a quantity detectable in the experiment
the averaged dc-current resulting from a sequence of voltage pulses is also calculated.
The obtained data are analyzed with respect to their dependence on the voltage pulse shape, the
magnitude and asymmetry of the lead-molecule coupling, and the mechanism and strength of
intramolecular relaxation. All the findings are confronted with recent computations on transient
currents due to optical excitation of the junction [1,2].
[1] L. Wang and V. May, Phys.Chem.Chem.Phys. 13,
8755 (2011)
Y. Zelinskyy and V. May, Nano Lett. 12, 446 (2012)).