Park In-Hyeok, Zhang Qiannan, Kwon Ki Chang, Zhu Ziyu, Yu Wei, Leng Kai, Giovanni David, Choi Hwa Seob, Abdelwahab Ibrahim, Xu Qing-Hua, Sum Tze Chien, Loh Kian Ping
Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Singapore 117543 , Singapore.
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore.
J Am Chem Soc. 2019 Oct 9;141(40):15972-15976. doi: 10.1021/jacs.9b07776. Epub 2019 Sep 26.
Hybrid organic-inorganic perovskites (HOIPs) are a new generation of high-performance materials for solar cells and light emitting diodes. Beyond these applications, ferroelectricity and spin-related properties of HOIPs are increasingly attracting interests. The presence of strong spin-orbit coupling, allied with symmetry breaking ensured by remanent polarization, should give rise to Rashba-type splitting of electronic bands in HOIP. However, the report of both ferroelectricity and Rashba effect in HOIP is rare. Here we report the observation of robust ferroelectricity and Rashba effect in two-dimensional Dion-Jacobson perovskites.
有机-无机杂化钙钛矿（HOIPs）是用于太阳能电池和发光二极管的新一代高性能材料。除了这些应用之外，HOIPs的铁电性和与自旋相关的特性越来越受到关注。强自旋-轨道耦合的存在，再加上由剩余极化确保的对称性破缺，应该会导致HOIP中电子能带的Rashba型分裂。然而，关于HOIP中铁电性和Rashba效应的报道都很少。在这里，我们报告了在二维狄翁-雅各布森钙钛矿中观察到的强铁电性和Rashba效应。
