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TT: Fachverband Tiefe Temperaturen

TT 28: Poster Session: Topological Topics

TT 28.3: Poster

Monday, March 12, 2018, 15:00–19:00, Poster B

Local moment spin dynamics as a probe for topological properties — •Guilherme G. Lesseux^1,2, Martin Dressel¹, Marc Scheffler¹, Jean C. Souza², Ricardo R. Urbano², Pascoal J. G. Pagliuso², and Carlos Rettori^2,3 — ¹1. Physikalisches Institut - Universität Stuttgart, Stuttgart, Germany — ²"Gleb Wataghin" Institute of Physics - University of Campinas, Campinas, Brazil — ³CCNH, Universidade Federal do ABC, Santo André, Brazil

Electron spin resonance (ESR) of diluted magnetic impurities is a powerful local technique that can directly probe the nature of the interactions between localized magnetic moments and the electronic environment as well as the local, dynamic and static, crystalline site symmetry. Therefore, ESR may be an appropriate tool to investigate metallic surface states and other related relevant features for the physics of topologically nontrivial materials. Here, we present experimental strategies to probe topological properties by means of local moment spin dynamics. Unusual ESR results in half-Heusler YPt(Pd)Bi and SmB₆ compounds are presented and discussed in terms of their topological properties.