| Title | Room-Temperature Ferroelectricity in 1T '-ReS2 Multilayers |
| Authors | Wan, Yi Hu, Ting Mao, Xiaoyu Fu, Jun Yuan, Kai Song, Yu Gan, Xuetao Xu, Xiaolong Xue, Mingzhu Cheng, Xing Huang, Chengxi Yang, Jinbo Dai, Lun Zeng, Hualing Kan, Erjun |
| Affiliation | Nanjing Univ Sci & Technol, MIIT Key Lab Semicond Microstruct & Quantum Sensi, Nanjing 210094, Peoples R China Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Peoples R China Univ Sci & Technol China, Int Ctr Quantum Design Funct Mat ICQD, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China Peking Univ, State Key Lab Artificial Microstruct & Mesoscop P, Sch Phys, Beijing 100871, Peoples R China Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China Northwestern Polytech Univ, MOE Key Lab Mat Phys & Chem Extraordinary Condit, Sch Sci, Xian 710072, Peoples R China Northwestern Polytech Univ, Shaanxi Key Lab Opt Informat Technol, Sch Sci, Xian 710072, Peoples R China |
| Keywords | INPLANE SEMICONDUCTORS ANISOTROPY METALS |
| Issue Date | 8-Feb-2022 |
| Publisher | PHYSICAL REVIEW LETTERS |
| Abstract | van der Waals materials possess an innate layer degree of freedom and thus are excellent candidates for exploring emergent two-dimensional ferroelectricity induced by interlayer translation. However, despite being theoretically predicted, experimental realization of this type of ferroelectricity is scarce at the current stage. Here, we demonstrate robust sliding ferroelectricity in semiconducting 1T'-ReS2 multilayers via a combined study of theory and experiment. Room-temperature vertical ferroelectricity is observed in twodimensional 1T'-ReS2 with layer number N >= 2. The electric polarization stems from the uncompensated charge transfer between layers and can be switched by interlayer sliding. For bilayer 1T'-ReS2, the ferroelectric transition temperature is estimated to be similar to 405 K from the second harmonic generation measurements. Our results highlight the importance of interlayer engineering in the realization of atomic Scale ferroeletricity. |
| URI | http://hdl.handle.net/20.500.11897/637990 |
| ISSN | 0031-9007 |
| DOI | 10.1103/PhysRevLett.128.067601 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 |
