Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 48: Focus Session: Spin Phenomena in Chiral Molecular Systems II (joint session O/TT)
O 48.5: Vortrag
Mittwoch, 20. März 2024, 12:00–12:15, MA 141
Magnetization generation in helical molecular junctions — •Richard Korytár1, Jan van Ruitenbeek2, and Ferdinand Evers3 — 1Univerzita Karlova, Prague, Czech Republic — 2Leiden University — 3University of Regensburg
Despite extensive experimental and theoretical literature on the spin-selective transport in helical molecules [1], a satisfactory theoretical explanation of the effect is lacking [2]. We present analytical calculations of charge and spin conductances in a minimal model of a helical molecule with spin orbit coupling attached to non-magnetic leads. The calculations extend previous studies, which focused on spin-polarization [5,3]. The band-structure of the model exhibits spin-momentum locked bands analogous the the edge modes of a quantum spin Hall system. The spin currents in the left and right lead carry opposite signs and consequently both leads pick up parallel magnetizations (in linear response). We discuss the feedback of resulting spin accumulations in the leads to the charge current [4].
[1] Ron Naaman, Yossi Paltiel & David H. Waldeck, Nature Reviews Chemistry, volume 3, pages 250*260 (2019)
[2] Evers et al., Adv. Mater. 2022, 34, 2106629
[3] J. M. van Ruitenbeek, R. Korytár, F. Evers, J. Chem. Phys. 159, 024710 (2023)
[4] R. Korytár, J. M. Ruitenbeek, F. Evers, in preparation
[5] K. Michaeli and R. Naaman, J. Phys. Chem. C 123, 17043 (2019)
Keywords: chirality-induced spin selectivity; molecular junctions; helical molecules; quantum transport