Data for: Correlated states in doubly-aligned hBN/graphene/hBN heterostructures
- 1. 1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 2.School of Material Science and Engineering, University of Science and Technology of China, Anhui 230026, China
- 2. 3.School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China 4.ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 200031, China
- 3. 5.Collaborative Innovation Center of Quantum Matter, Beijing 100871, China 6.State Key Lab for Mesoscopic Physics and School of Physics, Peking University, Beijing, China5Collaborative Innovation Center of Quantum Matter, Beijing 100871, China 6State Key Lab for Mesoscopic Physics and School of Physics, Peking University, Beijing, China
- 4. 7.Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
- 5. 8.International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
- 6. 1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 2.School of Material Science and Engineering, University of Science and Technology of China, Anhui 230026, China 12.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, P.R.China 13.State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, P. R. China
- 7. 9.College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China
- 8. 10.School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, China
- 9. 11.Beijing Computational Science Research Center, Beijing 100193, China
- 10. 5.Collaborative Innovation Center of Quantum Matter, Beijing 100871, China 6.State Key Lab for Mesoscopic Physics and School of Physics, Peking University, Beijing, China
- 11. 12.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, P.R.China 13.State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, P. R. China
Description
Interfacial moiré superlattice in van der Waals vertical assemblies effectively reconstructs the crystal symmetry, leading to opportunities for investigating exotic quantum states. Notably, a two-dimensional nanosheet has top and bottom open surfaces, allowing the specific case of doubly aligned super-moiré lattice to serve as a toy model for studying the tunable lattice symmetry and the complexity of related electronic structures. Here, we show that by doubly aligning a monolayered graphene to both top and bottom encapsulating hexagonal boron nitride (h-BN), multiple conductivity minima are observed away from the main Dirac point, which are sensitively tunable with respect to the small twist angles. Moreover, our experimental evidences together with theoretical calculations suggest correlated insulating states at integer fillings of -5, -6, -7 electrons per moiré unit cell, possibly due to inter-valley coherence. Our results provide a way to construct intriguing strong correlations in 2D electronic systems, in the weak interaction regime.
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Hofstadter raw data.zip
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- Is supplement to
- 10.5281/zenodo.5078093 (DOI)