新型“手性分子/半导体”结构的自旋注入特性及其调控研究

在当今飞速发展的大数据时代，半导体自旋电子器件有望把存储和逻辑功能融合在一块芯片上，在信息工业界占据十分重要的位置。高效率的自旋注入是半导体自旋电子学发展的关键科学问题。本项目融合分子界面化学与自旋电子学这两个学科领域各自的优点，旨在通过手性分子作为产生自旋极化电流的新材料，借助自行开发的界面化学处理的核心技术，实现利用手性分子向半导体的自旋注入，研究手性螺旋结构诱导的自旋选择特性，揭示“手性分子/半导体”界面的电导匹配和抗自旋散射的物理机制，探明不同手性分子在不同半导体表面进行自组装和形成自旋输运通道的规律，最终以高自旋注入效率为目标，解决这个半导体自旋电子学一直以来的挑战性问题，在自旋量子调控方面开辟了一个独特路径，为将来有机分子在自旋电子学的大规模应用提供指导意见。

In today's rapidly developing big data era, semiconductor spintronic devices are expected to integrate memory and logic functions into one chip, occupying a very important position in the information industry. High efficiency of spin injection is a key scientific issue in the development of semiconductor spintronics. This project integrates the advantages of molecular interface chemistry and spintronics field. We aim to realize the spin injection into semiconductors by self-assembly chiral molecules and self-developed interface chemical treatment. The chiral molecules are novel materials that can generate spin polarized currents, originating from the spin filter effect which is induced by chiral helix structure. We will reveal the physical mechanism of conductance matching and anti-spin-scattering at the interface of chiral molecule/semiconductor hetero-junction. The self-assembly of different chiral molecules on different semiconductor surfaces and the formation of spin transport channels through interface will be clarified. Finally, with the goal of high spin injection efficiency, we will solve the challenging problem in semiconductor spintronics. This project will open up a new pathway in spin quantum manipulation, and provide guidance for utilizing organic molecules in spintronics widely in future.