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Transport through a vibrating quantum dot: Polaronic effects
- We present a Green's function based treatment of the effects of electron-phonon coupling on transport through a molecular quantum dot in the quantum limit. Thereby we combine an incomplete variational Lang-Firsov approach with a perturbative calculation of the electron-phonon self energy in the framework of generalised Matsubara Green functions and a Landauer-type transport description. Calculating the ground-state energy, the dot single-particle spectral function and the linear conductance at finite carrier density, we study the low-temperature transport properties of the vibrating quantum dot sandwiched between metallic leads in the whole electron-phonon coupling strength regime. We discuss corrections to the concept of an anti-adiabatic dot polaron and show how a deformable quantum dot can act as a molecular switch.
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| Author: | T Koch, J Loos, A Alvermann, A R Bishop, H Fehske |
|---|---|
| URN: | urn:nbn:de:gbv:9-opus-59787 |
| DOI: | https://doi.org/10.1088/1742-6596/220/1/012014 |
| ISSN: | 1742-6596 |
| Parent Title (English): | Journal of Physics: Conference Series |
| Publisher: | IOP Publishing |
| Place of publication: | Bristol |
| Document Type: | Conference Proceeding |
| Language: | English |
| Date of first Publication: | 2010/04/01 |
| Release Date: | 2022/12/01 |
| GND Keyword: | - |
| Volume: | 220 |
| Article Number: | 012014 |
| Page Number: | 9 |
| Faculties: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik |
| Licence (German): |  Creative Commons - Namensnennung |