Donarini, A. and Yar, A. and Grifoni, M. (2012) Vibration induced memory effects and switching in ac-driven molecular nanojunctions. EUROPEAN PHYSICAL JOURNAL B, 85 (9): 316. ISSN 1434-6028, 1434-6036
Full text not available from this repository. (Request a copy)Abstract
We investigate bistability and memory effects in a molecular junction weakly coupled to metallic leads with the latter being subject to an adiabatic periodic change of the bias voltage. The system is described by a simple Anderson-Holstein model and its dynamics is calculated via a master equation approach. The controlled electrical switching between the many-body states of the system is achieved due to polaron shift and Franck-Condon blockade in the presence of strong electron-vibron interaction. Particular emphasis is given to the role played by the excited vibronic states in the bistability and hysteretic switching dynamics as a function of the voltage sweeping rates. In general, both the occupation probabilities of the vibronic states and the associated vibron energy show hysteretic behaviour for driving frequencies in a range set by the minimum and maximum lifetimes of the system. The consequences on the transport properties for various driving frequencies and in the limit of DC-bias are also investigated.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CONDUCTANCE; TRANSPORT; HYSTERESIS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 May 2020 08:21 |
| Last Modified: | 06 May 2020 08:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/18156 |
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