Interface electronic structure at the topological insulator-ferrimagnetic insulator junction

Y. Kubota, K. Murata, J. Miyawaki, K. Ozawa, M. C. Onbasli, T. Shirasawa, B. Feng, Sh Yamamoto, R. Y. Liu, S. Yamamoto, S. K. Mahatha, P. Sheverdyaeva, P. Moras, C. A. Ross, S. Suga, Y. Harada, K. L. Wang, I. Matsuda

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

An interface electron state at the junction between a three-dimensional topological insulator film, Bi2Se3, and a ferrimagnetic insulator film, Y3Fe5O12 (YIG), was investigated by measurements of angle-resolved photoelectron spectroscopy and x-ray absorption magnetic circular dichroism. The surface state of the Bi2Se3 film was directly observed and localized 3d spin states of the Fe3+ in the YIG film were confirmed. The proximity effect is likely described in terms of the exchange interaction between the localized Fe 3d electrons in the YIG film and delocalized electrons of the surface and bulk states in the Bi2Se3 film.

Original languageEnglish
Article number055002
JournalJournal of Physics Condensed Matter
Volume29
Issue number5
DOIs
Publication statusPublished - 2017 Feb 8
Externally publishedYes

Keywords

  • ferrimagnetic insulator
  • heterojunction
  • synchrotron radiation
  • topological insulator

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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