Regensburg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 26: Surface Magnetism
O 26.2: Vortrag
Dienstag, 6. September 2022, 10:45–11:00, H4
Magnetization switching on self-assembled structure of alpha-helix-polyalanine molecules observed by ambient STM — •Nguyen T. N. Ha1, L. Rasabathina2, O. Helwig2, A. Sharma3, G. Salvan3, S. Yochelis4, Y. Paltiel4, and C. Tegenkamp1 — 1Solid Surface Analysis, Technische Universität Chemnitz, Germany — 2Functional Magnetic Materials, Technische Universität Chemnitz, Germany — 3Semiconductor Physics, Technische Universität Chemnitz, Germany — 4Department of Applied Physics, Hebrew University of Jerusalem, Israel
Polyalanine (PA) with an alpha-helix conformation has gathered recently a lot of interest as the propagation of electrons along the helical backbone structure comes along with spin polarization of the transmitted electron. The magnetization switching on self-assembly of PA molecules on Au(111)/Co/Au/Pt/Al2O3 substrate by an external magnetic field resulting the preferentially transmitted electrons depending on molecule's specific handedness and the direction of magnetization. The transmission of the electrons through this structure comes along with an quite high efficient spin polarization. The tip-sample distance variation due to magnetization switching on PA films has shown the jumping states between up and down magnetic direction, while on the bare substrate without PA film the stable tip-sample distance was observed. This observation is further confirmed the spin filter behavior of PA film on a magnetic substrate due to CISS effect at nanoscale.[1]N.T.N.Ha et al, J. Phys. Chem. C,124,10,5734-5739,2020.