Hierarchical quantum master equation approach to electronic-vibrational coupling in nonequilibrium transport through nanosystems

Schinabeck C, Erpenbeck A, Haertle R, Thoss M (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Physical Review B American Physical Society

Book Volume: 94

Article Number: 201407

Journal Issue: 20

DOI: 10.1103/PhysRevB.94.201407

Abstract

Within the hierarchical quantum master equation (HQME) framework, an approach is presented, which allows a numerically exact description of nonequilibrium charge transport in nanosystems with strong electronic-vibrational coupling. The method is applied to a generic model of vibrationally coupled transport considering a broad spectrum of parameters ranging from the nonadiabatic to the adiabatic regime and including both resonant and off-resonant transport. We show that nonequilibrium effects are important in all these regimes. In particular, in the off-resonant transport regime, the inelastic cotunneling signal is analyzed for a vibrational mode in full nonequilibrium, revealing a complex interplay of different transport processes and deviations from the commonly used G0/2 rule of thumb. In addition, the HQME approach is used to benchmark approximate master equation and nonequilibrium Green's function methods.

Authors with CRIS profile

Christian Schinabeck Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien André Erpenbeck Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien Michael Thoss Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

Georg-August-Universität Göttingen DE Germany (DE)

How to cite

APA:

Schinabeck, C., Erpenbeck, A., Haertle, R., & Thoss, M. (2016). Hierarchical quantum master equation approach to electronic-vibrational coupling in nonequilibrium transport through nanosystems. Physical Review B, 94(20). https://doi.org/10.1103/PhysRevB.94.201407

MLA:

Schinabeck, Christian, et al. "Hierarchical quantum master equation approach to electronic-vibrational coupling in nonequilibrium transport through nanosystems." Physical Review B 94.20 (2016).

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