Interface electronic structure at the topological insulator–ferrimagnetic insulator junction
Author(s)Kubota, Y; Murata, K; Miyawaki, J; Ozawa, K; Shirasawa, T; Feng, B; Yamamoto, Sh; Liu, R-Y; Yamamoto, S; Mahatha, S K; Sheverdyaeva, P; Moras, P; Suga, S; Harada, Y; Wang, K L; Matsuda, I; Onbasli, Mehmet Cengiz; Ross, Caroline A; ... Show more Show less
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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 Fe ³⁺ 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.
DepartmentMassachusetts Institute of Technology. Department of Materials Science and Engineering
Journal of Physics: Condensed Matter
Kubota, Y et al. “Interface Electronic Structure at the Topological Insulator–ferrimagnetic Insulator Junction.” Journal of Physics: Condensed Matter 29, 5 (December 2016): 055002 © 2016 IOP Publishing Ltd