Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 58: Transport: Poster Session

TT 58.54: Poster

Mittwoch, 9. März 2016, 15:00–18:30, Poster D

Effect of the electromagnetic environment on ac driven tunnel junctions — •Moritz Frey and Hermann Grabert — Physikalisches Institut, Universität Freiburg

We analyze the effect of the lead impedance on a tunnel junction driven by a time-dependent voltage source. The external drive excites the modes of the electromagnetic environment and modifies the dynamical Coulomb blockade effect familiar from dc driven junctions. In particular, we consider the electrical current flowing in the leads of the junction when it is driven by a superposition of a constant and a sinusoidal voltage source. The electromagnetic environment gives rise to a suppression of higher harmonics of the average current. We also investigate the current noise and the validity of fluctuation-dissipation relations. Specific predictions are made for a tunnel junction driven through an LC-circuit as studied recently experimentally [1,2].
C. Altimiras et al., PRL 112, 236803 (2014)
O. Parlavecchio et al., PRL 114, 126801 (2015)].