Li Wang, Jiajie Qi, Wenya Wei, Mengqi Wu, Zhibin Zhang, Xiaomin Li, Huacong Sun, Quanlin Guo, Meng Cao, Qinghe Wang, Chao Zhao, Yuxuan Sheng, Zhetong Liu, Can Liu, Muhong Wu, Zhi Xu, Wenlong Wang, Hao Hong, Peng Gao, Menghao Wu, Zhu-Jun Wang, Xiaozhi Xu, Enge Wang, Feng Ding, Xiaorui Zheng, Kaihui Liu, Xuedong Bai
Within the family of two-dimensional dielectrics, rhombohedral boron nitride (rBN) is considerably promising owing to having not only the superior properties of hexagonal boron nitride1-4 -including low permittivity and dissipation, strong electrical insulation, good chemical stability, high thermal conductivity and atomic flatness without dangling bonds-but also useful optical nonlinearity and interfacial ferroelectricity originating from the broken in-plane and out-of-plane centrosymmetry5-23 . However, the preparation of large-sized single-crystal rBN layers remains a challenge24-26 , owing to the requisite unprecedented growth controls to coordinate the lattice orientation of each layer and the sliding vector of every interface...
May 2024: Nature