Transport through a vibrating quantum dot: Polaronic effects
| Autor: | Koch, T., Loos, J., Alvermann, A., Bishop, A. R., Fehske, H. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | J. Phys. Conf. Series 220, 012023 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1742-6596/220/1/012014 |
| Popis: | 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. Comment: 10 pages, 8 figures, Proceedings of "Progress in Nonequilibrium Green's Function IV" Conference, Glasgow 2009 |
| Databáze: | arXiv |
| Externí odkaz: |
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