Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures
Polshyn H, Zhu J, Kumar M, Taniguchi T, Watanabe K, MacDonald A, Young A. 2020. Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures. APS March Meeting 2020. APS: American Physical Society, Bulletin of the American Physical Society, vol. 65, B51.00005.
Download (ext.)
https://meetings.aps.org/Meeting/MAR20/Session/B51.5
[Published Version]
Conference Paper
| Published
| English
Author
Polshyn, HryhoriyISTA ;
Zhu, Jihang;
Kumar, Manish;
Taniguchi, Takashi;
Watanabe, Kenji;
MacDonald, Allan;
Young, Andrea
Series Title
Bulletin of the American Physical Society
Abstract
We experimentally investigate twisted van der Waals heterostructures of monolayer graphene rotated with respect to a bernal stacked graphene bilayer. We report transport measurements for devices with twist angles between 0.9 and 1.4°. The electric field allows efficient tuning of the width, isolation and the topology of the moiré bands in this system. By comparing magnetoresistance measurements to numerical simulations, we develop an understanding of the band structure. Finally, we observe correlated states at half- and quarter-fillings, which arise when narrow moire sublattice band is isolated by energy gaps from dispersive bands. We investigate the effects of in-plane and out-of-plane magnetic field on these states and discuss the implication for their spin- and valley- polarization.
Publishing Year
Date Published
2020-03-01
Proceedings Title
APS March Meeting 2020
Volume
65
Issue
1
Article Number
B51.00005
Conference
APS: American Physical Society
Conference Location
Denver, CO, United States
Conference Date
2020-03-02 – 2020-03-06
ISSN
IST-REx-ID
Cite this
Polshyn H, Zhu J, Kumar M, et al. Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures. In: APS March Meeting 2020. Vol 65. American Physical Society; 2020.
Polshyn, H., Zhu, J., Kumar, M., Taniguchi, T., Watanabe, K., MacDonald, A., & Young, A. (2020). Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures. In APS March Meeting 2020 (Vol. 65). Denver, CO, United States: American Physical Society.
Polshyn, Hryhoriy, Jihang Zhu, Manish Kumar, Takashi Taniguchi, Kenji Watanabe, Allan MacDonald, and Andrea Young. “Correlated States and Tunable Topological Bands in Twisted Monolayer-Bilayer Graphene Heterostructures.” In APS March Meeting 2020, Vol. 65. American Physical Society, 2020.
H. Polshyn et al., “Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures,” in APS March Meeting 2020, Denver, CO, United States, 2020, vol. 65, no. 1.
Polshyn H, Zhu J, Kumar M, Taniguchi T, Watanabe K, MacDonald A, Young A. 2020. Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures. APS March Meeting 2020. APS: American Physical Society, Bulletin of the American Physical Society, vol. 65, B51.00005.
Polshyn, Hryhoriy, et al. “Correlated States and Tunable Topological Bands in Twisted Monolayer-Bilayer Graphene Heterostructures.” APS March Meeting 2020, vol. 65, no. 1, B51.00005, American Physical Society, 2020.
All files available under the following license(s):
Copyright Statement:
This Item is protected by copyright and/or related rights. [...]
Link(s) to Main File(s)
Access Level
Open Access