SKM 2023 – scientific programme
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O: Fachverband Oberflächenphysik
O 85: Electronic Structure of Surfaces II
O 85.6: Talk
Thursday, March 30, 2023, 16:15–16:30, REC C 213
Electronic structure at the "interface" of spin-orbit and exchange interaction: Ultrathin ferromagnetic films on W(110) — •Pascal Jona Grenz1, Peter Krüger1, Marcel Holtmann1, Koji Miyamoto2, Shiv Kumar2, Taichi Okuda2, and Markus Donath1 — 1WWU, Münster, Germany — 2HISOR, Hiroshima, Japan
Ultrathin ferromagnetic layers on W(110) provide a suitable platform for investigating spin phenomena originating from the interplay of spin-orbit coupling (SOC) and exchange interaction (XC). First, we focus on the influence of ferromagnetic adlayers on the SOC-induced topologically non-trivial surface state (TSS) hosted by the W(110) surface [1,2]. Our systematic angle-resolved photoemission study of thin Ni, Co, and Fe films and their influence on the TSS will be presented and discussed in view of conflicting literature results [3]. Second, the unoccupied electronic structure of thin Ni films on W(110) is surveyed by spin- and angle-resolved inverse photoemission. By carefully choosing the Ni film’s thickness, we tune the relative strength of SOC and XC. In such a way, SOC induces a degeneracy of Ni-related exchange-split states. Based on density functional theory, the strong interplay of SOC and XC is traced back to the hybridization of W and Ni states.
[1] K. Miyamoto et al., Phys. Rev. Lett. 108, 066808 (2012)
[2] P.J. Grenz et al., J. Phys.: Condens. Matter 33, 285504 (2021)
[3] K. Honma et al., Phys. Rev. Lett. 115, 266401 (2015)