Spin selectivity of chiral mesostructured diamagnetic BiOBr films  

作　　者：Kun Ding Jing Ai Hao Chen Zhibei Qu Peizhao Liu Lu Han Shunai Che Yingying Duan 

机构地区：[1]Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai University of Electric Power,Shanghai 200090,China [2]School of Chemistry and Chemical Engineering,Frontiers Science Center for Transformative Molecules,State Key Laboratory of Matrix Composite,Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs,Shanghai Jiao Tong University,800 Dongchuan Road,Shanghai 200240,China [3]School of Chemical Science and Engineering,Tongji University,1239 Siping Road,Shanghai 200092,China [4]Department of Medicinal Chemistry,School of Pharmacy,Fudan University,826 Zhangheng Road,Shanghai 201203,China

出　　处：《Nano Research》2023年第8期11444-11449,共6页纳米研究（英文版）

基　　金：supported by the National Key R&D Program of China(No.2021YFA1200300);the National Natural Science Foundation of China(Nos.21931008,21975184,21873072,and 21922304);the scientific foundation of the Shanghai Municipal Science and Technology Commission(Nos.19JC1410300).

摘　　要：The chirality-induced spin selectivity(CISS)has been found in the antiferromagnetic and paramagnetic chiral inorganic materials with unpaired electrons,while rarely reported in the spin-paired diamagnetic inorganic materials with spin-pairing energy.Here,we report the CISS in the spin-paired diamagnetic BiOBr endowed with three levels of chiral mesostructures.Chiral mesostructured BiOBr films(CMBFs)were fabricated through a sugar alcohol-induced hydrothermal route.The antipodal CMBFs exhibited chirality-dependent,magnetic field-independent magnetic circular dichroism(MCD)signals,which indicates the existence of spin selectivity.The spin selectivity of CMBFs was speculated to be the result of the competing effect between the externally applied magnetic field and the effective magnetic field arisen from the spin electron motions in chiral potential.The chirality-induced effective magnetic field acts on the magnetic moment of electrons,potentially overcoming the spin-pairing energy and producing opposite energy changes for spin-down and spin-up electrons.

关 键 词：chiral mesostructures diamagnetic material chiral-induced spin selectivity(CISS) magnetic circular dichroism(MCD) 

分 类 号：O64[理学—物理化学]