Badala Viswanatha Chetana, Stöckl Johannes, Arnoldi Benito, Becker Sebastian, Aeschlimann Martin, Stadtmüller Benjamin
Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany.
Department of Chemistry, University of Kaiserslautern, Erwin-Schrödinger-Straße 52, 67663 Kaiserslautern, Germany.
J Phys Chem Lett. 2022 Jul 7;13(26):6244-6249. doi: 10.1021/acs.jpclett.2c00983. Epub 2022 Jun 30.
The discovery of the electrons' chiral induced spin selective transmission (CISS) through chiral molecules has opened the pathway for manipulating spin transport in nonmagnetic structures on the nanoscale. CISS has predominantly been explored in structurally helical molecules on surfaces, where the spin selectivity affects only the spin polarization of the electrons along their direction of propagation. Here, we demonstrate a spin selective electron transmission for the point-chiral molecule 3-methylcyclohexanone (3-MCHO) adsorbed on the chiral Cu(643) surface. Using spin- and momentum-resolved photoelectron spectroscopy, we detect a spin-dependent electron transmission through a single layer of 3-MCHO molecules that depends on all three components of the electrons' spin. Crucially, exchanging the enantiomers alters the electrons' spin component oriented parallel to the terraces of the Cu(643) surface. The findings are attributed to the enantiomer-specific adsorption configuration on the surface. This opens the intriguing opportunity to selectively tune CISS by the enantiospecific molecule-surface interaction in all-chiral heterostructures.
通过手性分子发现电子的手性诱导自旋选择性传输（CISS），为在纳米尺度上操纵非磁性结构中的自旋输运开辟了道路。CISS主要在表面结构为螺旋状的分子中得到研究，其中自旋选择性仅影响电子沿其传播方向的自旋极化。在此，我们展示了吸附在手性Cu(643)表面的点手性分子3-甲基环己酮（3-MCHO）的自旋选择性电子传输。利用自旋和动量分辨光电子能谱技术，我们检测到通过单层3-MCHO分子的自旋相关电子传输，该传输取决于电子自旋的所有三个分量。至关重要的是，对映体的交换改变了平行于Cu(643)表面平台取向的电子自旋分量。这些发现归因于表面上对映体特异性吸附构型。这为通过全手性异质结构中的对映体特异性分子-表面相互作用选择性调节CISS提供了有趣的机会。
