Krueckl, Viktor and Richter, Klaus (2012) Bloch-Zener oscillations in graphene and topological insulators. PHYSICAL REVIEW B, 85 (11): 115433. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We show that superlattices based on zero-gap semiconductors such as graphene and mercury telluride exhibit characteristic Bloch-Zener oscillations that emerge from the coherent superposition of Bloch oscillations and multiple Zener tunneling between the electron and hole branch. We demonstrate this mechanism by means of wave-packet dynamics in various spatially periodically modulated nanoribbons subject to an external bias field. The associated Bloch frequencies exhibit a peculiar periodic bias dependence, which we explain within a two-band model. Supported by extensive numerical transport calculations, we show that this effect gives rise to distinct current oscillations observable in the I-V characteristics of graphene and mercury telluride superlattices.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | WANNIER-STARK LADDERS; HGTE QUANTUM-WELLS; SEMICONDUCTOR SUPERLATTICE; ELECTRIC-FIELD; STATE; EMISSION; LATTICES; PHASE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 18 May 2020 08:45 |
| Last Modified: | 18 May 2020 08:45 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19043 |
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