Highly Efficient Spin-Filtering Transport in Chiral Hybrid Copper Halides
Highly Efficient Spin-Filtering Transport in Chiral Hybrid Copper Halides
复制标题
手性杂化卤化铜中的高效旋转过滤传输
DOI：
10.1002/anie.202109595
复制
发表时间：
2021-10-01
影响因子：
16.6
通讯作者：
Song, Cheng
中科院分区：
文献类型：
--
作者：
Lu, Ying;Wang, Qian;Song, Cheng
手性Pb（Sn）-I有机-无机杂化钙钛矿材料具有优异的手性诱导自旋选择性（CISS）性能，但高稳定性的无铅杂化材料仍是自旋电子学应用中自旋过滤的理想材料。我们合成了手性杂化卤化铜（R/S-MBA）（2）CuX_4（MBA=甲基苄基铵; X=Cl，Br），具有特征的0 D CuX_4四面体结构基序，结合了Cu ~（2+）的低毒性和卤离子（Cl-和Br-）的空气稳定性。尽管结构和电子特征相似，（R/S-MBA）（2）CuBr 4显示出比氯化物对应物小得多的手性光学活性。磁传导原子力显微镜测量显示出典型的自旋极化电荷传输性能与高效率高达90%的两个卤化铜。我们的工作将CISS效应扩展到环境友好且稳定的金属有机卤化物，这在基于过渡金属杂化系统的自旋电子学中具有应用前景。
Chiral Pb(Sn)-I hybrid organic-inorganic perovskites exhibit outstanding chiral-induced spin selectivity (CISS) performance, but the nontoxic lead-free hybrid materials with high stability are still greatly desired for spin filtering in spintronic applications. We synthesize chiral hybrid copper halides (R/S-MBA)(2)CuX4 (MBA=methylbenzylammonium; X=Cl, Br) with characteristic 0D CuX4 tetrahedral structural motifs, combining the low toxicity of Cu2+ and air stability of halide ions (Cl- and Br-). Despite similar structural and electronic features, (R/S-MBA)(2)CuBr4 shows much smaller chiroptical activity than the chloride counterpart. Magnetically conductive atomic force microscopy measurements display a typical spin-polarized charge-transport property with high efficiency up to 90 % for both copper halides. Our work expands the CISS effect into eco-friendly and stable metal-organic halides, which is promising for applications in spintronics based on transition-metal hybrid systems.