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Journal of Experimental and Theoretical Physics

, Volume 129, Issue 3, pp 404–412 | Cite as

Magnetic and Electronic Properties of Gd-Doped Topological Insulator Bi1.09Gd0.06Sb0.85Te3

  • S. O. FilnovEmail author
  • Yu. A. Surnin
  • A. V. Koroleva
  • I. I. Klimovskikh
  • D. A. Estyunin
  • A. Yu. Varykhalov
  • K. A. Bokai
  • K. A. Kokh
  • O. E. Tereshchenko
  • V. A. Golyashov
  • E. V. Shevchenko
  • A. M. Shikin
ORDER, DISORDER, AND PHASE TRANSITION IN CONDENSED SYSTEM
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Abstract

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 Bi1.09Gd0.06Sb0.85Te3 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.

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Notes

ACKNOWLEDGMENTS

The studies were also carried out at the resource centers of St. Petersburg State University “Physical Methods for Surface Research” and “Diagnosis of functional materials for medicine, pharmacology and nanoelectronics”. We are grateful to the staff of the Helmholtz Center in Berlin for financial and technical support.

FUNDING

This work was supported by a research grant from the Ministry of Education and Science of the Russian Federation and St. Petersburg State University (grant no. 15.61.202.2015), by Russian Science Foundation (grant no. 18-12-00062), by Russian Foundation of Basic Researches (grant no. 17-08-00955) and by state contract of IGM SB RAS. In addition the work was supported by German-Russian Interdisciplinary Science Center (G-RISC) funded by the German Federal Foreign Office via the German Academic Exchange Service (DAAD) and Russian-German laboratory at BESSY II (Helmholtz-Zentrum Berlin).

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Copyright information

© Pleiades Publishing, Inc. 2019

Authors and Affiliations

  • S. O. Filnov
    • 1
    Email author
  • Yu. A. Surnin
    • 1
  • A. V. Koroleva
    • 1
  • I. I. Klimovskikh
    • 1
  • D. A. Estyunin
    • 1
  • A. Yu. Varykhalov
    • 2
  • K. A. Bokai
    • 1
  • K. A. Kokh
    • 1
    • 3
    • 4
  • O. E. Tereshchenko
    • 1
    • 3
    • 5
  • V. A. Golyashov
    • 1
    • 3
    • 5
  • E. V. Shevchenko
    • 1
  • A. M. Shikin
    • 1
  1. 1.St. Petersburg State UniversitySt. PetersburgRussia
  2. 2.Helmholtz-Zentrum Berlin fur Materialien und Energie, Elektronenspeicherring BESSY IIBerlinGermany
  3. 3.Novosibirsk State UniversityNovosibirskRussia
  4. 4.Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of SciencesNovosibirskRussia
  5. 5.Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of SciencesNovosibirskRussia

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