Yar, Abdullah and Donarini, Andrea and Koller, Sonja and Grifoni, Milena (2011) Dynamical symmetry breaking in vibration-assisted transport through nanostructures. PHYSICAL REVIEW B, 84 (11): 115432. ISSN 1098-0121,
Full text not available from this repository.Abstract
A theoretical model of a single molecule coupled to many vibronic modes is presented. At low energies, transport is dominated by electron-vibron processes where transfer of an electron through the dot is accompanied by the excitation or emission of quanta (vibrons). Because the frequency of the nth mode is taken as an nth multiple of the frequency of the fundamental mode, several energetically degenerate or quasidegenerate vibronic configurations can contribute to transport. We investigate the consequences of strong electron-vibron coupling in a fully symmetric setup. Several striking features are predicted. In particular, a gate asymmetry and pronounced negative differential conductance features are observed. We attribute these features to the presence of slow channels originating from the interplay of Franck-Condon suppression of transport channels with spin and/or orbital degeneracies.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NANOTUBE QUANTUM DOTS; TRANSISTORS; MOLECULE; BLOCKADE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 May 2020 12:03 |
| Last Modified: | 29 May 2020 12:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20164 |
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