Berlin 2008 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 17: Poster I
DY 17.24: Poster
Dienstag, 26. Februar 2008, 16:00–18:00, Poster C
Nonlinear hopping conduction in open channels — •Martin Körner1, Mario Einax1, Philipp Maass1, and Abraham Nitzan2 — 1Institut für Physik, Technische Universität Ilmenau, 98684 Ilmenau, Germany — 2School of Chemistry, The Sackler University of Science, Tel Aviv University, Tel Aviv 69978, Israel
The nonlinear conduction under the influence of strong static and oscillating electric fields is investigated based on an open channel model. In the model thermally activated hopping is considered on a linear chain connected to two particle reservoirs with different electrochemical potentials. An analytical expression for the stationary current is derived and tested against numerical calculations. In particular we discuss the behaviour of the nonlinear dc-current in the thermodynamic limit. A systematic scheme for analyzing the response to strong oscillating fields is presented and numerical results for frequency-dependent nonlinear conductivities are compared to measurements on thin-film glassy electrolytes.