Vibrationally dependent electron-electron interactions in resonant electron transport through single-molecule junctions

Erpenbeck A, Haertle R, Bockstedte MG, Thoss M (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Physical Review B American Physical Society

Publisher: American Physical Society

Book Volume: 93

Pages Range: 115421

Journal Issue: 11

URI: http://link.aps.org/doi/10.1103/PhysRevB.93.115421

DOI: 10.1103/PhysRevB.93.115421

Abstract

We investigate the role of electronic-vibrational coupling in resonant electron transport through single-molecule junctions, taking into account that the corresponding coupling strengths may depend on the charge and excitation state of the molecular bridge. Within an effective-model Hamiltonian approach for a molecule with multiple electronic states, this requires to extend the commonly used model and include vibrationally dependent electron-electron interaction. We use Born-Markov master equation methods and consider selected models to exemplify the effect of the additional interaction on the transport characteristics of a single-molecule junction. In particular, we show that it has a significant influence on local cooling and heating mechanisms, it may result in negative differential resistance, and it may cause pronounced asymmetries in the conductance map of a single-molecule junction.

Authors with CRIS profile

André Erpenbeck Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien Michel Georg Bockstedte Lehrstuhl für Theoretische Festkörperphysik Michael Thoss Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope

Involved external institutions

Georg-August-Universität Göttingen DE Germany (DE)

How to cite

APA:

Erpenbeck, A., Haertle, R., Bockstedte, M.G., & Thoss, M. (2016). Vibrationally dependent electron-electron interactions in resonant electron transport through single-molecule junctions. Physical Review B, 93(11), 115421. https://dx.doi.org/10.1103/PhysRevB.93.115421

MLA:

Erpenbeck, André, et al. "Vibrationally dependent electron-electron interactions in resonant electron transport through single-molecule junctions." Physical Review B 93.11 (2016): 115421.

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