Liu, Ming-Hao and Gorini, Cosimo and Richter, Klaus (2017) Creating and Steering Highly Directional Electron Beams in Graphene. PHYSICAL REVIEW LETTERS, 118 (6): 066801. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We put forward a concept to create highly collimated, nondispersive electron beams in pseudorelativistic Dirac materials such as graphene or topological insulator surfaces. Combining negative refraction and Klein collimation at a parabolic pn junction, the proposed lens generates beams, as narrow as the focal length, that stay focused over scales of several microns and can be steered by a magnetic field without losing collimation. We demonstrate the lens capabilities by applying it to two paradigmatic settings of graphene electron optics: We propose a setup for observing high-resolution angle-dependent Klein tunneling, and, exploiting the intimate quantum-to-classical correspondence of these focused electron waves, we consider high-fidelity transverse magnetic focusing accompanied by simulations for current mapping through scanning gate microscopy. Our proposal opens up new perspectives for next-generation graphene electron optics experiments.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | P-N-JUNCTIONS; BALLISTIC GRAPHENE; DIRAC FERMIONS; SUPERLATTICES; TRANSPORT; STATES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:01 |
| Last Modified: | 26 Feb 2019 14:58 |
| URI: | https://pred.uni-regensburg.de/id/eprint/398 |
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