华南理工大学蒋尚达研究团队在研究中取得进展。他们报道了铁电性和强自旋-轨道耦合增强分子自旋-电耦合。相关论文于2025年3月12日发表在《美国化学会杂志》上。

本文选择他们的化合物为例，研究了自旋-轨道耦合和铁电性对自旋-电耦合的贡献。利用电场调制连续波电子顺磁共振确定了相对依赖于取向的哈密顿项。根据实验光谱的特点，分析并确定了化合物中自旋-电耦合效应的来源。同时，结果表明，强自旋-轨道耦合对于产生显著的自旋-电耦合至关重要，并且这种效应可以通过铁电放大约2个数量级。这项工作可以指导合理筛选和设计具有合适自旋-电耦合强度的材料，这可能会引发低功率自旋电子学和精确操纵自旋量子行为的技术。

据介绍，磁的电控制被认为是分子自旋电子学和量子信息研究的前景。然而，在大多数情况下，自旋-电耦合强度不足以应用。能够放大相对效应的两个主要因素是自旋轨道耦合和铁电性。

附：英文原文

Title: Ferroelectricity and Strong Spin–Orbit Coupling to Enhance Molecular Spin-Electric Coupling

Author: You-Chao Liu, Jia-Xin Chen, Jun-Fei Bu, Peng-Xiang Fu, Ye-Xin Wang, Zheng Liu, Song Gao, Shang-Da Jiang

Issue&Volume: March 12, 2025

Abstract: The electric control of magnetism has been considered to be promising for molecular spintronics and quantum information. However, the spin-electric coupling strength appears to be insufficient for application in most cases. Two major factors capable of amplifying the relative effect are spin–orbit coupling and ferroelectricity. Herein, we chose four compounds as examples to study the contribution of spin–orbit coupling and ferroelectricity to spin-electric coupling. The relative orientation-dependent Hamiltonian terms were determined via electric-field modulated continuous-wave electron paramagnetic resonance. The origins of the spin-electric coupling effect in the four compounds are discussed and determined according to the characteristics of the experimental spectra. Meanwhile, the results demonstrated that strong spin–orbit coupling is crucial for producing significant spin-electric coupling and that the effect can be amplified by about 2 orders of magnitude by ferroelectricity. This work can guide the rational screen and design of materials with applicable spin-electric coupling strength, which may provoke techniques including low-power spintronics and precise manipulation of the quantum behavior of spins.

DOI: 10.1021/jacs.4c17949

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.4c17949