Quadruple-well ferroelectricity and topological domain structures in strained Bi2O2Se

• DOI: 10.1039/d3tc04733d
• Publication Date: 2024-03-26T10:21:04Z
• Authors: Ziye Zhu; Jiaming Hu; Xiaoping Yao; Shu Zhao
• Keywords: 0301 basic medicine; 03 medical and health sciences

We demonstrate that biaxially strained Bi 2 O Se holds unusual quadruple-well dipole orders, a two-step 90° ferroelectric switching and various types of spontaneous topological domain structures.