Topological Phase Transitions Driven by Magnetic Phase Transitions in FexBi2Te3 (0x0.1) Single Crystals

Heon-Jung Kim, Ki-Seok Kim, J.-F. Wang, V. A. Kulbachinskii, K. Ogawa, M. Sasaki, A. Ohnishi, M. Kitaura, Y.-Y. Wu, L. Li, I. Yamamoto, J. Azuma, M. Kamada, and V. Dobrosavljević
Phys. Rev. Lett. 110, 136601 – Published 25 March 2013
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We propose a phase diagram for FexBi2Te3 (0x0.1) single crystals, which belong to a class of magnetically bulk-doped topological insulators. The evolution of magnetic correlations from ferromagnetic to antiferromagnetic gives rise to topological phase transitions, where the paramagnetic topological insulator of Bi2Te3 turns into a band insulator with ferromagnetic-cluster glassy behavior around x0.025, and it further evolves to a topological insulator with valence-bond glassy behavior, which spans over the region from x0.03 up to x0.1. This phase diagram is verified by measuring magnetization, magnetotransport, and angle-resolved photoemission spectra with theoretical discussions.

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  • Received 6 August 2012


© 2013 American Physical Society

Authors & Affiliations

Heon-Jung Kim1,*, Ki-Seok Kim2, J.-F. Wang3, V. A. Kulbachinskii4, K. Ogawa5, M. Sasaki6, A. Ohnishi6, M. Kitaura6, Y.-Y. Wu3, L. Li3, I. Yamamoto5, J. Azuma5, M. Kamada5, and V. Dobrosavljević7

  • 1Department of Physics, College of Natural Science, Daegu University, Gyeongbuk 712-714, Republic of Korea
  • 2Department of Physics, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Republic of Korea
  • 3Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
  • 4Physics Department, Moscow State University, Moscow 119899, Russia
  • 5Synchrotron Light Application Center, Saga University, Honjo, Saga 840-8502, Japan
  • 6Department of Physics, Faculty of Science, Yamagata University, Kojirakawa, Yamagata 990-8560, Japan
  • 7Department of Physics and National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA

  • *Corresponding author.

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Vol. 110, Iss. 13 — 29 March 2013

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