Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 46: Electronic Structure of Surfaces: Spectroscopy, Surface States

O 46.14: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1A

Systematics of 3d transition metal–doped Sb2Te3 — •Johannes Jung, Thomas Bathon, Paolo Sessi, and Matthias Bode — Universität Würzburg; Physikalisches Institut; Experimentelle Physik II, Würzburg, Germany

Time-reversal symmetry plays a crucial role in topological insulators (TIs). Once broken, topological surface states become gapped and unconventional states of matter such as the quantum anomalous Hall effect can be realized.

Here, we present a systematic investigation of the prototypical TI Sb2Te3 where different magnetic perturbations are introduced by bulk-doping with 3d transition elements (V, Cr, Mn, Fe). The dopants adsorption sites are localized and classified by atomically resolved scanning tunneling microscopy, while scanning tunneling spectroscopy allows to visualize their influence on the local electronic environment of the host material.

[1] P. Sessi et. al., Nature Communications, 7, 12027 (2016).

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