Department of Physics and Optoelectronic Engineering, Faculty of Science, Beijing University of Technology, Beijing, 100124, P. R. China.
Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
Small. 2022 Aug;18(32):e2203015. doi: 10.1002/smll.202203015. Epub 2022 Jul 14.
Spintronics and molecular chemistry have achieved remarkable achievements separately. Their combination can apply the superiority of molecular diversity to intervene or manipulate the spin-related properties. It inevitably brings in a new type of functional devices with a molecular interface, which has become an emerging field in information storage and processing. Normally, spin polarization has to be realized by magnetic materials as manipulated by magnetic fields. Recently, chiral-induced spin selectivity (CISS) was discovered surprisingly that non-magnetic chiral molecules can generate spin polarization through their structural chirality. Here, the recent progress of integrating the strengths of molecular chemistry and spintronics is reviewed by introducing the experimental results, theoretical models, and device performances of the CISS effect. Compared to normal ferromagnetic metals, CISS originating from a chiral structure has great advantages of high spin polarization, excellent interface, simple preparation process, and low cost. It has the potential to obtain high efficiency of spin injection into metals and semiconductors, getting rid of magnetic fields and ferromagnetic electrodes. The physical mechanisms, unique advantages, and device performances of CISS are sequentially clarified, revealing important issues to current scientific research and industrial applications. This mini-review points out a key technology of information storage for future spintronic devices without magnetic components.
自旋电子学和分子化学各自取得了显著的成就。它们的结合可以将分子多样性的优势应用于干预或操纵与自旋相关的性质。这不可避免地带来了一种具有分子界面的新型功能器件，成为信息存储和处理领域的一个新兴领域。通常，自旋极化必须通过磁场操纵磁性材料来实现。最近，令人惊讶地发现了手性诱导自旋选择（CISS）效应，即非磁性手性分子可以通过其结构手性产生自旋极化。在这里，通过介绍 CISS 效应的实验结果、理论模型和器件性能，综述了分子化学和自旋电子学优势相结合的最新进展。与普通铁磁金属相比，源于手性结构的 CISS 具有高自旋极化、优异的界面、简单的制备工艺和低成本的巨大优势。它有可能获得高效的自旋注入到金属和半导体中，摆脱磁场和铁磁电极。依次阐明了 CISS 的物理机制、独特优势和器件性能，揭示了当前科学研究和工业应用的重要问题。这篇迷你综述指出了未来无磁元件自旋电子器件信息存储的一项关键技术。
