Huber, Robin and Liu, Ming-Hao and Chen, Szu-Chao and Drienovsky, Martin and Sandner, Andreas and Watanabe, Kenji and Taniguchi, Takashi and Richter, Klaus and Weiss, Dieter and Eroms, Jonathan (2020) Gate-Tunable Two-Dimensional Superlattices in Graphene. NANO LETTERS, 20 (11). pp. 8046-8052. ISSN 1530-6984, 1530-6992
Full text not available from this repository. (Request a copy)Abstract
We report an efficient technique to induce gatetunable two-dimensional superlattices in graphene by the combined action of a back gate and a few-layer graphene patterned bottom gate complementary to existing methods. The patterned gates in our approach can be easily fabricated and implemented in van der Waals stacking procedures, allowing flexible use of superlattices with arbitrary geometry. In transport measurements on a superlattice with a lattice constant a = 40 nm, well-pronounced satellite Dirac points and signatures of the Hofstadter butterfly including a nonmonotonic quantum Hall response are observed. Furthermore, the experimental results are accurately reproduced in transport simulations and show good agreement with features in the calculated band structure. Overall, we present a comprehensive picture of graphene-based superlattices, featuring a broad range of miniband effects, both in experiment and in theoretical modeling. The presented technique is suitable for studying more advanced geometries which are not accessible by other methods.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; graphene; gate-tunable; superlattice; satellite Dirac points; Hofstadter butterfly |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Mar 2021 08:25 |
| Last Modified: | 08 Mar 2021 08:25 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43386 |
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