1. Institute for Experimental and Applied PhysicsUniversity of RegensburgD‐93040RegensburgGermany
2. Peter Grünberg Institute (PGI‐9) and JARA‐Fundamentals of Future Information TechnologyForschungszentrum Jülich GmbH52425JülichGermany
3. Helmholtz Virtual Institute for Topological Insulators (VITI)Forschungszentrum Jülich52425JülichGermany