自旋电子学
铁电性
材料科学
点反射
拉希巴效应
手性(物理)
圆极化
不对称
光致发光
半导体
钙钛矿(结构)
凝聚态物理
光电子学
光学
铁磁性
物理
对称性破坏
结晶学
电介质
手征对称破缺
量子力学
微带线
化学
Nambu–Jona Lasinio模型
作者
Chang‐Chun Fan,Xiang‐Bin Han,Bei‐Dou Liang,Chao Shi,Le‐Ping Miao,Chao‐Yang Chai,Chengdong Liu,Qiong Ye,Wen Zhang
标识
DOI:10.1002/adma.202204119
摘要
Direct detection of circularly polarized light (CPL) is a challenging task due to limited materials and ambiguous structure-property relationships that lead to low distinguishability of the light helicities. Perovskite ferroelectric semiconductors incorporating chirality provide new opportunities in dealing with this issue. Herein, a pair of 2D chiral perovskite ferroelectrics is reported, which have enhanced CPL detection performance due to interplays among lattice, photon, charge, spin, and orbit. The chirality-transfer-induced chiral&polar ferroelectric phase enhances the asymmetric nature of the photoactive sublattice and achieves a switchable self-powered detection via the bulk photovoltaic effect. The single-crystal-based device exhibits a CPL-sensitive detection performance under 430 nm with an asymmetric factor of 0.20 for left- and right-CPL differentiation, about two times that of the pure chiral counterparts. The enhanced CPL detection performance is ascribed to the Rashba-Dresselhaus effect that originates from the bulk inversion asymmetry and strong spin-orbit coupling, shown with a large Rashba coefficient, which is demonstrated by density functional theory calculation and circularly polarized light excited photoluminescence measurement. These results provide new perspectives on chiral Rashba ferroelectric semiconductors for direct CPL detection and ferroelectrics-based chiroptics and spintronics.
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