Donarini, Andrea and Niklas, Michael and Grifoni, Milena (2020) Interference and shot noise in a degenerate Anderson-Holstein model. PHYSICAL REVIEW B, 102 (12): 125422. ISSN 2469-9950, 2469-9969
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We study the transport properties of an Anderson-Holstein model with orbital degeneracies and a tunneling phase that allows for the formation of dark states. The resulting destructive interference yields a characteristic pattern of positive and negative differential conductance features with enhanced shot noise, without further asymmetry requirements in the coupling to the leads. The transport characteristics are strongly influenced by the Lamb-shift renormalization of the system Hamiltonian. Thus, the electron-vibron coupling cannot be extracted by a simple fit of the current steps to a Poisson distribution. For strong vibronic relaxation, a simpler effective model with analytical solution allows for a better understanding and moreover demonstrates the robustness of the described effects.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FRANCK-CONDON BLOCKADE; NANOTUBE; VIBRATIONS; TRANSPORT; JUNCTIONS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 11 Mar 2021 11:26 |
| Last Modified: | 11 Mar 2021 11:26 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43776 |
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