The interplay of ferroelectricity and magneto-transport in non-magnetic moiré superlattices

Siqi Jiang, Renjun Du, Jiawei Jiang, Gan Liu, Jiabei Huang, Yu Du, Yaqing Han, Jingkuan Xiao, Di Zhang, Fuzhuo Lian, Wanting Xu, Siqin Wang, Lei Qiao, Kenji Watanabe, Takashi Taniguchi, Xiaoxiang Xi, Wei Ren, Baigeng Wang, Alexander S. Mayorov (), Kai Chang, Hongxin Yang (), Lei Wang () and Geliang Yu ()
Additional contact information
Siqi Jiang: Nanjing University
Renjun Du: Nanjing University
Jiawei Jiang: Nanjing University
Gan Liu: Nanjing University
Jiabei Huang: Nanjing University
Yu Du: Nanjing University
Yaqing Han: Nanjing University
Jingkuan Xiao: Nanjing University
Di Zhang: Nanjing University
Fuzhuo Lian: Nanjing University
Wanting Xu: Nanjing University
Siqin Wang: Nanjing University
Lei Qiao: Shanghai University
Kenji Watanabe: National Institute for Materials Science
Takashi Taniguchi: National Institute for Materials Science
Xiaoxiang Xi: Nanjing University
Wei Ren: Shanghai University
Baigeng Wang: Nanjing University
Alexander S. Mayorov: Nanjing University
Kai Chang: School of Physics, Zhejiang University
Hongxin Yang: School of Physics, Zhejiang University
Lei Wang: Nanjing University
Geliang Yu: Nanjing University

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract The coupling of ferroelectricity and magnetic order provides rich tunability for engineering material properties and demonstrates great potential for uncovering novel quantum phenomena and multifunctional devices. Here, we report interfacial ferroelectricity in moiré superlattices constructed from graphene and hexagonal boron nitride. We observe ferroelectric polarization in an across-layer moiré superlattice with an intercalated layer, demonstrating a remnant polarization comparable to its non-intercalated counterpart. Remarkably, we reveal a magnetic-field enhancement of ferroelectric polarization that persists up to room temperature, showcasing an unconventional amplification of ferroelectricity in materials lacking magnetic elements. This phenomenon, consistent across devices with varying layer configurations, arises purely from electronic rather than ionic contributions. Furthermore, the ferroelectric polarization in turn modulates quantum transport characteristics, suppressing Shubnikov-de Haas oscillations and altering quantum Hall states in polarized phases. This interplay between ferroelectricity and magneto-transport in non-magnetic materials is crucial for exploring magnetoelectric effects and advancing two-dimensional memory and logic applications.

Date: 2025
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DOI: 10.1038/s41467-025-60783-5

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