Dresden 2014 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 16: Electronic Structure and Spin-Orbit Interaction II

O 16.11: Vortrag

Montag, 31. März 2014, 18:30–18:45, GER 38

Spin-orbit-induced spin polarization on W(110) — •Henry Wortelen¹, Jürgen Henk², Anke B. Schmidt¹, and Markus Donath¹ — ¹Physikalisches Institut, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany — ²Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle, Germany

Despite W(110) being nonmagnetic, its electronic structure exhibits spin-polarized states due to spin-orbit interaction, e.g., a spin-polarized Dirac-cone-like surface state below the Fermi level [1,2]. We report on the unoccupied electronic structure of W(110) investigated with spin-resolved inverse photoemission experiments and calculations. We compare results for Γ-N and Γ-H, which are inequivalent due to the two-fold symmetry. A complex spin structure is observed for the surface states, which even depends on the photon detection angle. This shows that the measured spin polarization does not necessarily resemble the spin structure of the respective electronic state.

[1] K. Miyamoto et al., Phys. Rev. Lett. 108, 066808 (2012)

[2] H. Mirhosseini et al., New J. Phys. 15, 033019 (2013)