手性分子自旋极化与电子器件应用  

Spin Polarization of Chiral Molecules and Electronic Device Applications

作　　者：张钰[1] 尚紫璇 王光成 王晓蕾 Zhang Yu;Shang Zixuan;Wang Guangcheng;Wang Xiaoei(Department of Physics and Optoelectronic Engineering,Faculty of Science,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学理学部物理与光电工程系,北京100124

出　　处：《稀有金属》2023年第8期1163-1177,共15页Chinese Journal of Rare Metals

基　　金：国家自然科学基金面上项目(12074018)资助。

摘　　要：分子化学和自旋电子学两个领域的交叉融合,使得利用分子多样性的优势来干预或调控自旋电子器件成为可能。具有分子界面的新型有机/无机功能器件的开发,成为信息存储领域的研究热点。通常自旋极化来源于由磁场控制的磁性材料。然而,最近的一些研究发现,非磁性的手性分子可以通过其自身的手性螺旋结构产生自旋极化,这种现象被称作手性诱导的自旋选择性(CISS)效应。相比于常规铁磁金属,基于分子手性结构的CISS效应有着高效的自旋极化、优异的分子界面、简单的制备流程和极低的生产成本等众多优点,实现了无需外界磁场和铁磁电极的高效率自旋注入。从CISS效应相关研究的实验结果、理论模型和器件性能等方面介绍近些年来CISS领域的最新研究进展,及利用基于手性分子的自旋电子器件进行信息存储和逻辑编译的关键技术,为自旋电子学器件的实际应用提供了一个可行的方向。The combination of organic molecular materials and inorganic solid materials has drawn much attention in various scientific research fields,such as condensed matter physics,materials engineering technology,and molecular biology.Organic molecular materials have their own unique advantages,such as flexibility,plasticity,tunability,scalability,and addressability.Furthermore,they can easily combine with inorganic materials to form heterojunctions and produce unique properties at the interface.Spintronics has brought traditional electronics into the quantum age.In the field of information storage and quantum computing,the investigation about manipulating electron spins is developing rapidly.Since the required energy to manipulate the spin of an electron is only one-thousandth of the energy to drive the directional movement of an electron,the consumed energy of spintronic devices is much lower than that of traditional microelectronic devices.Spintronics and molecular chemistry have achieved extraordinary research results in their respective fields.Their combination can apply the advantages of molecular diversity to manipulate or intervene the electron spin.New functional devices with molecular interfaces are fabricated based on this research direction,which have become a scientific hotspot in the information storage field.Generally,spin polarization comes from magnetic materials controlled by magnetic fields.In contrast,recent studies have found that non-magnetic chiral molecules can produce spin polarization through their chiral structure.This phenomenon is called chiral-induced spin selectivity(CISS)effect.The spiral structure of chiral molecules,such as DNA and peptides,can induce extremely strong spin-orbit coupling,which results in high spin polarization in electric currents.This effect has been confirmed by numerous experiments.The discovery of the CISS effect has greatly promoted the development and performance of spintronic devices.It has been found that many types of chiral materials have the CISS effect excep

关 键 词：手性分子 自旋选择性 自旋极化 分子界面 自旋注入 自旋电子学器件 

分 类 号：O469[理学—凝聚态物理] O649.4[理学—电子物理学]