Magnetic Bloch States at Integer Flux Quanta Induced by Super-moirÃ© Potential in Graphene Aligned with Twisted Boron Nitride

doi:arXiv:2502.07283

	Magnetic Bloch States at Integer Flux Quanta Induced by Super-moirÃ© Potential in Graphene Aligned with Twisted Boron Nitride
	Ma, Yaqi 1,2; Huang, Meizhen 1,2; Zhang, Xu 1,3,4; Hu, Weixiong5 ; Zhou, Zishu 1,2; Feng, Kai 1; Li, Wenhui5,6 ; Chen, Yong 1,2; Lou, Chenxuan 1,2; Zhang, Weikang 1,2; Ji, Haoxi 1,2; Wang, Yibo 1,2; Wu, Zefei 1,2; Cui, Xiaodong 1,3; Yao, Wang 1,3; Yan, Shichao5 ; Meng, Zi Yang 1,3; Wang, Ning 1,2
	2025-02-11
状态	已发表
摘要	Two-dimensional electron systems in both magnetic fields and periodic potentials are described by Hofstadter butterfly, a fundamental problem of solid-state physics.While moirÃ© systems provide a powerful method to realize this spectrum, previous experiments, however, have been limited to fractional flux quanta regime due to the difficulty of building ~ 50 nm periodic modulations.Here, we demonstrate a super-moirÃ© strategy to overcome this challenge. By aligning monolayer graphene (G) with 1.0{deg} twisted hexagonal boron nitride (t-hBN), a 63.2 nm bichromatic G/t-hBN super-moirÃ© is constructed, made possible by exploiting the electrostatic nature of t-hBN potential.Under magnetic field B, magnetic Bloch states at integer flux quanta (1-9) are achieved and observed as integer Brown-Zak oscillations, expanding the flux quanta from factions to integers.Theoretical analysis reproduces these experimental findings. This work opens new avenues to study unexplored Hofstadter butterfly, explore emergent topological order at integer flux quanta and engineer long-wavelength periodic modulations.
语种	英语
DOI	arXiv:2502.07283
相关网址	查看原文
出处	Arxiv
收录类别	PPRN.PPRN
WOS记录号	PPRN:121373380
WOS类目	Physics, Condensed Matter
资助项目	Research Grants Council (RGC) of Hong Kong Special Administrative Region of China["17301721","AoE/P-701/20","17309822","HKU C7037-22GF","17302223"] ; Research Grants Council (RGC) of Hong Kong["AoE/P701/20","16303720","C7037-22GF"] ; National Key R&D Program of China[2020YFA0309600] ; ANR/RGC Joint Research Scheme by French National Research Agency[A HKU703/22]
文献类型	预印本
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/507023
专题	物质科学与技术学院物质科学与技术学院_PI研究组_颜世超组物质科学与技术学院_博士生
通讯作者	Huang, Meizhen; Meng, Zi Yang; Wang, Ning
作者单位	1.Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Peoples R China 2.Hong Kong Univ Sci & Technol, Ctr Quantum Mat, Hong Kong, Peoples R China 3.Univ Hong Kong, HK Inst Quantum Sci & Technol, Hong Kong, Peoples R China 4.Univ Ghent, Dept Phys & Astron, B-9000 Ghent, Belgium 5.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai, Peoples R China 6.ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Ma, Yaqi,Huang, Meizhen,Zhang, Xu,et al. Magnetic Bloch States at Integer Flux Quanta Induced by Super-moirÃ© Potential in Graphene Aligned with Twisted Boron Nitride. 2025.