InSe Intralayer Sliding Ferroelectric

Picometer-level reversible control

Direct observation of ~6° intralayer sliding within InSe quadrilayers, with reversible polarization switching controlled by electric field direction, revealing the structural origin of ferroelectricity in 2D vdW materials.

Gao, Hanbin · Liu, Ziyuan · Gong, Yue · Ke, Changming · Guo, Ning · Wu, Juanxia · Zeng, Xin · Guo, Jianfeng · Cheng, Zhihai · Li, Jiawei · Zhang, Zhi · Liu, Xinfeng · Liu, Shi · Xie, Liming · Zheng, Qiang

Advanced Materials 2024

Specifications

Direct observation
{'zh': '约6', 'en': '~6'} °

Advantages

Reversal of intralayer sliding achieved by altering electric field direction

DFT calculations reveal reversible picometer-level intralayer sliding responsible for switchable out-of-plane polarization