Large Anomalous Hall Effect in Topological Insulators with Proximitized Ferromagnetic Insulators

Masataka Mogi, Taro Nakajima, Victor Ukleev, Atsushi Tsukazaki, Ryutaro Yoshimi, Minoru Kawamura, Kei S. Takahashi, Takayasu Hanashima, Kazuhisa Kakurai, Taka Hisa Arima, Masashi Kawasaki, Yoshinori Tokura

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

We report a proximity-driven large anomalous Hall effect in all-telluride heterostructures consisting of the ferromagnetic insulator Cr2Ge2Te6 and topological insulator (Bi,Sb)2Te3. Despite small magnetization in the (Bi,Sb)2Te3 layer, the anomalous Hall conductivity reaches a large value of 0.2e2/h in accord with a ferromagnetic response of the Cr2Ge2Te6. The results show that the exchange coupling between the surface state of the topological insulator and the proximitized Cr2Ge2Te6 layer is effective and strong enough to open the sizable exchange gap in the surface state.

Original languageEnglish
Article number016804
JournalPhysical review letters
Volume123
Issue number1
DOIs
Publication statusPublished - 2019 Jul 2

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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