Drienovsky, Martin and Schrettenbrunner, Franz-Xaver and Sandner, Andreas and Weiss, Dieter and Eroms, Jonathan and Liu, Ming-Hao and Tkatschenko, Fedor and Richter, Klaus (2014) Towards superlattices: Lateral bipolar multibarriers in graphene. PHYSICAL REVIEW B, 89 (11): 115421. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We report on transport properties of monolayer graphene with a laterally modulated potential profile, employing striped top gate electrodes with spacings of 100 to 200 nm. Tuning of top and back gate voltages gives rise to local charge carrier density disparities, enabling the investigation of transport properties either in the unipolar (nn') or the bipolar (np') regime. In the latter, pronounced single-and multibarrier Fabry-Perot (FP) resonances occur. We present measurements of different devices with different numbers of top gate stripes and spacings. The data are highly consistent with a phase coherent ballistic tight-binding calculation and quantum capacitance model, whereas a superlattice effect and modification of band structure can be excluded.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MASSLESS DIRAC FERMIONS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Nov 2019 14:17 |
| Last Modified: | 15 Nov 2019 14:17 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10464 |
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