Magnetic and Electronic Properties of Gd-Doped Topological Insulator Bi.sub.1.09Gd.sub.0.06Sb.sub.0.85Te.sub.3

The recent realization of quantum anomalous Hall effect and Majorana fermions observation enhance interest in magnetism investigation in topological insulators. In this work, the electronic and magnetic structure of the Gd-doped topological insulator Bi.sub.1.09Gd.sub.0.06Sb.sub.0.85Te.sub.3 were sy...

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Published inJournal of experimental and theoretical physics Vol. 129; no. 3; pp. 404 - 412
Main Authors Filnov, S. O, Surnin, Yu. A, Koroleva, A. V, Klimovskikh, I. I, Estyunin, D. A, Varykhalov, A. Yu, Bokai, K. A
Format Journal Article
LanguageEnglish
Published Springer 01.09.2019
Subjects
Analysis
Magnetism
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Summary:The recent realization of quantum anomalous Hall effect and Majorana fermions observation enhance interest in magnetism investigation in topological insulators. In this work, the electronic and magnetic structure of the Gd-doped topological insulator Bi.sub.1.09Gd.sub.0.06Sb.sub.0.85Te.sub.3 were systematically studied by means of angle-resolved photoemission spectroscopy, resonance photoemission spectroscopy (ResPES) and SQUID magnetometry. Resonant features related to the Gd density of states near the Fermi level are experimentally observed. Study of magnetic structure showed antiferromagnetic ordered bulk at low temperatures as well as presence of hysteresis loop at elevated temperatures. Finally, possible mechanism of magnetism and its relation to observed electronic features are discussed.
ISSN:1063-7761
1090-6509
DOI:10.1134/S106377611908003X