Chiral Molecules and the Spin Selectivity Effect
Chiral Molecules and the Spin Selectivity Effect
复制标题
手性分子与自旋选择性效应
DOI：
10.1021/acs.jpclett.0c00474
复制
发表时间：
2020-05-07
影响因子：
5.7
通讯作者：
Waldeck, D. H.
中科院分区：
文献类型：
--
作者：
Naaman, R.;Paltiel, Y.;Waldeck, D. H.
本文讨论了手性诱导自旋选择性（CISS）机制及其在手性分子和材料的电磁性质中的表现。虽然讨论强调较新的实验，如与铁磁表面的手性分子相互作用的磁化强度的依赖性，早期的实验，揭示了非线性标度的自旋过滤与施加的电位，也进行了描述。在许多理论研究中，为了重现实验中观察到的大自旋过滤，人们不得不调用异常大的自旋-轨道耦合。实验表明，交换相互作用和泡利不相容约束是CISS的一个重要方面。他们还证明了自旋依赖的铁磁衬底和手性分子之间的电荷流。考虑到这些见解，一个简化的模型中描述的手性分子的自旋极化增强的自旋封锁效应，产生大的自旋过滤。
This Perspective discusses recent experiments that bear on the chiral induced spin selectivity (CISS) mechanism and its manifestation in electronic and magnetic properties of chiral molecules and materials. Although the discussion emphasizes newer experiments, such as the magnetization dependence of chiral molecule interactions with ferromagnetic surfaces, early experiments, which reveal the nonlinear scaling of the spin filtering with applied potential, are described also. In many of the theoretical studies, one has had to invoke unusually large spin-orbit couplings in order to reproduce the large spin filtering observed in experiments. Experiments imply that exchange interactions and Pauli exclusion constraints are an important aspect of CISS. They also demonstrate the spin-dependent charge flow between a ferromagnetic substrate and chiral molecules. With these insights in mind, a simplified model is described in which the chiral molecule's spin polarization is enhanced by a spin blockade effect to generate large spin filtering.