Intrinsic Nonlinear Hall Effect and Gate-Switchable Berry Curvature Sliding in Twisted Bilayer Graphene

Huang, Meizhen1,2; Wu, Zefei1,2,7,8; Zhang, Xu3,4; Feng, Xuemeng1,2; Zhou, Zishu1,2; Wang, Shi1,2; Chen, Yong1,2,5; Cheng, Chun5; Sun, Kai6; Meng, Zi Yang3,4; Wang, Ning1,2

2023-08-11

10.1103/PhysRevLett.131.066301

PHYSICAL REVIEW LETTERS   影响因子和分区

0031-9007

1079-7114

Though the observation of the quantum anomalous Hall effect and nonlocal transport response reveals nontrivial band topology governed by the Berry curvature in twisted bilayer graphene, some recent works reported nonlinear Hall signals in graphene superlattices that are caused by the extrinsic disorder scattering rather than the intrinsic Berry curvature dipole moment. In this Letter, we report a Berry curvature dipole induced intrinsic nonlinear Hall effect in high-quality twisted bilayer graphene devices. We also find that the application of the displacement field substantially changes the direction and amplitude of the nonlinear Hall voltages, as a result of a field-induced sliding of the Berry curvature hotspots. Our Letter not only proves that the Berry curvature dipole could play a dominant role in generating the intrinsic nonlinear Hall signal in graphene superlattices with low disorder densities, but also demonstrates twisted bilayer graphene to be a sensitive and fine-tunable platform for second harmonic generation and rectification.

SCI ; EI

英语

NI论文

其他

National Key Ramp;D Program of China[2020YFA0309600] ; Research Grants Council (RGC) of Hong Kong["AoE/P701/20","16303720","C6025 -19G","17301420"] ; RGC of Hong Kong["17301721","17309822"] ; French National Research Agency[GJTD-2020-01] ; K. C. Wong Education Foundation[C7037 -22G] ; null[A_HKU703/22]

Physics

Physics, Multidisciplinary

WOS:001052950800005

AMER PHYSICAL SOC

20233514644676

Fruits ; Graphene devices ; Nonlinear optics ; Quantum chemistry ; Quantum Hall effect

Nonlinear Optics:741.1.1 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Agricultural Products:821.4 ; Classical Physics; Quantum Theory; Relativity:931

PHYSICS

Web of Science

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, Dept Phys, Hong Kong, Peoples R China
4.Univ Hong Kong, HKU UCAS Joint Inst Theoret & Computat Phys, Hong Kong, Peoples R China
5.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen, Peoples R China
6.Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
7.Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, England
8.Univ Manchester, Natl Graphene Inst, Mancheser M13 9PL, England

Huang, Meizhen,Wu, Zefei,Zhang, Xu,et al. Intrinsic Nonlinear Hall Effect and Gate-Switchable Berry Curvature Sliding in Twisted Bilayer Graphene[J]. PHYSICAL REVIEW LETTERS,2023,131(6).

Huang, Meizhen.,Wu, Zefei.,Zhang, Xu.,Feng, Xuemeng.,Zhou, Zishu.,...&Wang, Ning.(2023).Intrinsic Nonlinear Hall Effect and Gate-Switchable Berry Curvature Sliding in Twisted Bilayer Graphene.PHYSICAL REVIEW LETTERS,131(6).

Huang, Meizhen,et al."Intrinsic Nonlinear Hall Effect and Gate-Switchable Berry Curvature Sliding in Twisted Bilayer Graphene".PHYSICAL REVIEW LETTERS 131.6(2023).