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arXiv · 1509.06120

Transient currents of a single molecular junction with a vibrational mode

Guo-Hui Ding·Bo Xiong·Bing Dong
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Abstract

By using a propagation scheme for current matrices and an auxiliary mode expansion method, we investigate the transient dynamics of a single molecular junction coupled with a vibrational mode. Our approach is based on the Anderson-Holstein model and the dressed tunneling approximation for the electronic self-energy in the polaronic regime. The time-dependent currents after a sudden switching on the tunneling to leads and an abrupt upward step bias pulse are calculated. We show that the strong electron-phonon interaction greatly influences the nonlinear response properties of the system, and gives rise to interesting characteristics on the time traces of transient currents.

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Guo-Hui Ding, Bo Xiong, Bing Dong. 2015-09-21. Transient currents of a single molecular junction with a vibrational mode. https://doi.org/10.1088/0953-8984/28/6/065301

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