Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Topological Insulators I (jointly with DS, HL, O, TT)
MA 43.5: Vortrag
Mittwoch, 22. März 2017, 16:00–16:15, HSZ 401
Theoretical investigations of magnetically doped topological insulators — •Jan Minar1,2, Jürgen Braun1, Hubert Ebert1, Jaime Sanchez-Barriga3, Oliver Rader3, Jan Honolka4, and Andreas Ney5 — 1LMU München, Germany — 2University of West Bohemia, Plzen, Czech Rep. — 3Helmholz Zentrum, Berlin — 4ASCR, Institute of Physics, Prague — 5Johannes Kepler University Linz, Austria
Band gap opening of topological surface states due to magnetic doping is the subject of a long standing and ongoing discussion. However, in spite of the progress made during the last years in this field there are still phenomena that are poorly understood and many open issues to be addressed. In several cases, like for example Mn doped Bi2Se3 band gap opening does not seem to be of magnetic origin. We will present several examples for detailed theoretical studies on various bulk as well as surface doped topological insulators performed by means of the SPR-KKR band structure method. Our results will be discussed in direct comparison with corresponding ARPES [1], XAS and XMCD [2,3] experimental data.
[1] J. Sanchez-Barriga et al., Nat. Communications, 7, 10559 (2016)
[2] A. Ney et al., in preparation
[3] J. Honolka et al., PhysRevB 94, 161114 (2016)