Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 14: Electronic Structure of Surfaces: Magnetism and Spin Phenomena II
O 14.3: Vortrag
Montag, 20. März 2017, 15:30–15:45, WIL C107
Switchable spin - orbit gaps in a prototypical ferromagnet — •Ewa Mlynczak1, Markus Eschbach1, Stephan Borek2, Jan Minar2, Jürgen Braun2, Irene Aguilera1, Gustav Bihlmayer1, Sven Döring1, Mathias Gehlmann1, Pika Gospodaric1, Shigemasa Suga1, Lukasz Plucinski1, Stephan Blügel1, Hubert Ebert2, and Claus M. Schneider1 — 1Peter Grünberg Institut, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany — 2Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 München, Germany
In this contribution we will present results of a recent study of the influence of spin-orbit interaction (SOI) on the electronic properties of a prototypical ferromagnet, Fe(001) [1]. Using high resolution angle-resolved photoemission spectroscopy we demonstrate openings of the SOI - induced electronic band gaps, spin-orbit gaps (SOG), near the Fermi level. The SOG and thus the Fermi surface can be manipulated by changing the remanent magnetization direction. The experimental results are compared with the first-principles calculations and one-step photoemission calculations.
By pinpointing the regions in the electronic band structure where the switchable band gaps occur, we demonstrate the significance of SOI even for elements as light as 3d ferromagnets.
[1].E. Mlynczak et al. `Fermi surface manipulation by external magnetic field demonstrated for a prototypical ferromagnet' Phys. Rev. X (2016), accepted