Das Tapan Kumar, Naaman Ron, Fransson Jonas
Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel.
Department of Physics and Astronomy, Uppsala University, Uppsala, 75236, Sweden.
Adv Mater. 2024 Jul;36(29):e2313708. doi: 10.1002/adma.202313708. Epub 2024 May 20.
Chiral oligopeptide monolayers are adsorbed on a ferromagnetic surface and their magnetoresistance is measured as a function of the angle between the magnetization of the ferromagnet and the surface normal. These measurements are conducted as a function of temperature for both enantiomers. The angle dependence is found to follow a changing trend with a period of 360°. Quantum simulations reveal that the angular distribution can be obtained only if the monolayer has significant effective spin orbit coupling (SOC), that includes contribution from the vibrations. The model shows that SOC only in the leads cannot reproduce the observed angular dependence. The simulation can reproduce the experiments if it included electron-phonon interactions and dissipation.
手性寡肽单层吸附在铁磁表面上，并测量其磁电阻随铁磁体磁化方向与表面法线之间夹角的变化。对两种对映体都进行了这些测量，并将其作为温度的函数。发现角度依赖性呈现出周期为360°的变化趋势。量子模拟表明，只有当单层具有显著的有效自旋轨道耦合（SOC）时才能获得角分布，其中包括振动的贡献。该模型表明，仅在引线中的SOC无法重现观察到的角度依赖性。如果模拟包括电子 - 声子相互作用和耗散，则可以重现实验结果。
