Berlin 2018 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 17: Skyrmions III (joint session MA/TT/KFM)
KFM 17.2: Vortrag
Mittwoch, 14. März 2018, 15:15–15:30, EB 301
Theory of tunneling vector spin transport on a magnetic skyrmion — •Krisztián Palotás1,2, Levente Rózsa3, and László Szunyogh4 — 1Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia — 2University of Szeged, Szeged, Hungary — 3University of Hamburg, Hamburg, Germany — 4Budapest University of Technology and Economics, Budapest, Hungary
Spin-polarized scanning tunneling microscopy (SP-STM) demonstrated the creation and annihilation of individual magnetic skyrmions [1] that is promising for future technological use. The detailed microscopic mechanisms for these processes are, however, unknown. In the present work the tunneling spin transport of a magnetic skyrmion is theoretically investigated in SP-STM. The spin-polarized charge current [2] and tunneling spin transport vector quantities, the longitudinal spin current and the spin transfer torque are calculated in high spatial resolution within a simple electron tunneling theory for the first time. Beside the vector spin transport characteristics, the connections between conventional charge current SP-STM images and the magnitudes of the spin transport quantities are analyzed.
[1] N. Romming et al., Science 341, 636 (2013).
[2] K. Palotás et al., Phys. Rev. B 96, 024410 (2017).