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

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Published inJournal of experimental and theoretical physics Vol. 129; no. 3
Main Authors Filnov, S. O., Surnin, Yu. A., Koroleva, A. V., Klimovskikh, I. I., Estyunin, D. A., Varykhalov, A. Yu, Bokai, K. A., Kokh, K. A., Tereshchenko, O. E., Golyashov, V. A., Shevchenko, E. V., Shikin, A. M.
Format Journal Article
LanguageEnglish
Published United States 15.09.2019
Subjects
ANTIFERROMAGNETISM
ANTIMONY COMPOUNDS
BISMUTH COMPOUNDS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DENSITY OF STATES
DOPED MATERIALS
FERMI LEVEL
GADOLINIUM ADDITIONS
HALL EFFECT
HYSTERESIS
INTERMETALLIC COMPOUNDS
MAGNETOMETERS
MAJORANA FERMIONS
PHOTOELECTRON SPECTROSCOPY
RESONANCE
SQUID DEVICES
TELLURIUM COMPOUNDS
TOPOLOGY
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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 1.09}Gd{sub 0.06}Sb{sub 0.85}Te{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