Nonlinear hopping transport in ring systems and open channels
| Autor: | Mario Einax, Martin Koerner, Philipp Maass, Abraham Nitzan |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Physics
Coupling Ring (mathematics) Fourier Analysis Condensed Matter - Mesoscale and Nanoscale Physics Statistical Mechanics (cond-mat.stat-mech) Electric Conductivity FOS: Physical sciences General Physics and Astronomy Open-channel flow Computational physics Electron Transport Kinetics Nonlinear system Models Chemical Nonlinear Dynamics Rectification Simple ring Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Thermodynamic limit Jump Thermodynamics Physical and Theoretical Chemistry Condensed Matter - Statistical Mechanics |
| Zdroj: | Phys. Chem. Chem. Phys.. 12:645-654 |
| ISSN: | 1463-9084 1463-9076 |
| DOI: | 10.1039/b916827c |
| Popis: | We study the nonlinear hopping transport in one-dimensional rings and open channels. Analytical results are derived for the stationary current response to a constant bias without assuming any specific coupling to the external fields. It is shown that anomalous large effective jump lengths, as observed in recent experiments by taking the ratio of the third order nonlinear and the linear conductivity, can occur already in ordered systems. Rectification effects due to site energy disorder in ring systems are expected to become irrelevant for large system sizes. In open channels in contrast, rectification effects occur already for disorder in the jump barriers and do not vanish in the thermodynamic limit. Numerical solutions for a sinusoidal bias show that the ring system provides a good description for the transport behavior in the open channel for intermediate and high frequencies. For low frequencies temporal variations in the mean particle number have to be taken into account in the open channel, which cannot be captured in the more simple ring model. Comment: 25 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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