Effective Manipulation of a Colossal Second-Order Transverse Response in an Electric-Field-Tunable Graphene Moiré System

Jinrui Zhong, Shihao Zhang, Junxi Duan*, Huimin Peng, Qi Feng, Yuqing Hu, Qinsheng Wang, Jinhai Mao*, Jianpeng Liu*, Yugui Yao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The second-order nonlinear transport illuminates a frequency-doubling response emerging in quantum materials with a broken inversion symmetry. The two principal driving mechanisms, the Berry curvature dipole and the skew scattering, reflect various information including ground-state symmetries, band dispersions, and topology of electronic wave functions. However, effective manipulation of them in a single system has been lacking, hindering the pursuit of strong responses. Here, we report on the effective manipulation of the two mechanisms in a single graphene moiré superlattice, AB-BA stacked twisted double bilayer graphene. Most saliently, by virtue of the high tunability of moiré band structures and scattering rates, a record-high second-order transverse conductivity ∼ 510 μm S V-1 is observed, which is orders of magnitude higher than any reported values in the literature. Our findings establish the potential of electrically tunable graphene moiré systems for nonlinear transport manipulations and applications.

Original languageEnglish
Pages (from-to)5791-5798
Number of pages8
JournalNano Letters
Volume24
Issue number19
DOIs
Publication statusPublished - 15 May 2024

Keywords

  • Berry curvature dipole
  • moiré materials
  • second-order transverse response
  • skew scattering
  • twisted graphene

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