Correlated states in doubly-aligned hBN/graphene/hBN heterostructures

doi:10.1038/s41467-021-27514-y

CORC > 金属研究所 > 中国科学院金属研究所

	Correlated states in doubly-aligned hBN/graphene/hBN heterostructures
	Sun, Xingdan 1,2; Zhang, Shihao 3,4; Liu, Zhiyong 1,2; Zhu, Honglei 1,2; Huang, Jinqiang 1,2; Yuan, Kai 5,6; Wang, Zhenhua 1,2; Watanabe, Kenji 7; Taniguchi, Takashi 8; Li, Xiaoxi 1,2,9,10
刊名	NATURE COMMUNICATIONS
	2021-12-10
卷号	12 期号:1 页码:8
DOI	10.1038/s41467-021-27514-y
通讯作者	Wang, Zhenhua(zhwang@imr.ac.cn) ; Kang, Jun(jkang@csrc.ac.cn) ; Liu, Jianpeng(liujp@shanghaitech.edu.cn) ; Ye, Yu(ye_yu@pku.edu.cn) ; Han, Zheng Vitto(vitto.han@gmail.com)
英文摘要	Interfacial moire superlattices in van der Waals vertical assemblies effectively reconstruct 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-moire 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 graphene monolayer 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 moire unit cell, possibly due to inter-valley coherence. Our results provide a way to construct intriguing correlations in 2D electronic systems in the weak interaction regime. The alignment of three 2D nanosheets leads to the formation of super-moire atomic lattices, which can influence the electronic properties of van der Waals structures. Here, the authors report evidence of possible correlated insulating states in doubly-aligned hBN/graphene/hBN heterostructures, in a weak-interaction regime.
资助项目	National Key R&D Program of China[2017YFA0206302] ; National Key R&D Program of China[2019YFA0307800] ; National Key R&D Program of China[2020YFA0309601] ; National Key R&D Program of China[2018YFA0306900] ; National Natural Science Foundation of China (NSFC)[11974357] ; National Natural Science Foundation of China (NSFC)[U1932151] ; National Natural Science Foundation of China (NSFC)[51627801] ; National Natural Science Foundation of China (NSFC)[12074029] ; National Natural Science Foundation of China (NSFC)[U1930402] ; National Natural Science Foundation of China (NSFC)[52031014] ; National Natural Science Foundation of China (NSFC)[11991060] ; ShanghaiTech University ; Joint Research Fund of Liaoning-Shenyang National Laboratory for Materials Science[2019JH3/30100031] ; Liaoning Provincial Natural Science Fund[2021-MS-006] ; Elemental Strategy Initiative by MEXT, Japan[JPMXP0112101001] ; JSPS KAKENHI[19H05790] ; JSPS KAKENHI[JP20H00354] ; A3 Foresight by JSPS
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:000729179400015
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; ShanghaiTech University ; Joint Research Fund of Liaoning-Shenyang National Laboratory for Materials Science ; Liaoning Provincial Natural Science Fund ; Elemental Strategy Initiative by MEXT, Japan ; JSPS KAKENHI ; A3 Foresight by JSPS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/167340]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Zhenhua; Kang, Jun; Liu, Jianpeng; Ye, Yu; Han, Zheng Vitto
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China 4.ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 200031, Peoples R China 5.Peking Univ, Nanooptoelect Frontier Ctr, Sch Phys, State Key Lab Mesoscop Phys,Minist Educ, Beijing 100871, Peoples R China 6.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China 7.Natl Inst Mat Sci, Res Ctr Funct Mat, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan 8.Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan 9.Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China 10.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China
推荐引用方式 GB/T 7714	Sun, Xingdan,Zhang, Shihao,Liu, Zhiyong,et al. Correlated states in doubly-aligned hBN/graphene/hBN heterostructures[J]. NATURE COMMUNICATIONS,2021,12(1):8.
APA	Sun, Xingdan.,Zhang, Shihao.,Liu, Zhiyong.,Zhu, Honglei.,Huang, Jinqiang.,...&Zhang, Zhidong.(2021).Correlated states in doubly-aligned hBN/graphene/hBN heterostructures.NATURE COMMUNICATIONS,12(1),8.
MLA	Sun, Xingdan,et al."Correlated states in doubly-aligned hBN/graphene/hBN heterostructures".NATURE COMMUNICATIONS 12.1(2021):8.