Raith, Martin and Ertler, Christian and Stano, Peter and Wimmer, Michael and Fabian, Jaroslav (2014) Electric control of tunneling energy in graphene double dots. PHYSICAL REVIEW B, 89 (8): 085414. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We theoretically investigate the spectrum of a single electron double quantum dot, defined by top gates in a graphene with a substrate-induced gap. We examine the effects of electric and magnetic fields on the spectrum of localized states, focusing on the tunability of the interdot coupling. We find that the substrate-induced gap allows for electrostatic control, with some limitations that for a fixed interdot distance, the interdot coupling cannot be made arbitrarily small due to the Klein tunneling. On the other hand, the proximity of the valence band in graphene allows for new regimes, such as an npn double dot, which have no counterparts in GaAs.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM DOTS; EPITAXIAL GRAPHENE; CARBON; COMPUTATION; ELECTRONICS; TRANSISTORS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Nov 2019 14:51 |
| Last Modified: | 26 Nov 2019 14:51 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10662 |
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