Large Anomalous Hall Effect in Topological Insulators with Proximitized Ferromagnetic Insulators

被引：79

作者：

Mogi, Masataka ^{[1
,2
]}

Nakajima, Taro ^{[3
]}

Ukleev, Victor ^{[3
,4
]}

Tsukazaki, Atsushi ^{[5
]}

Yoshimi, Ryutaro ^{[3
]}

Kawamura, Minoru ^{[3
]}

Takahashi, Kei S. ^{[3
,6
]}

Hanashima, Takayasu ^{[7
]}

Kakurai, Kazuhisa ^{[3
,7
]}

Arima, Taka-hisa ^{[3
,8
]}

Kawasaki, Masashi ^{[1
,2
,3
]}

Tokura, Yoshinori ^{[1
,2
,3
,9
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] Univ Tokyo, QPEC, Bunkyo Ku, Tokyo 1138656, Japan

[3] RIKEN, CEMS, Wako, Saitama 3510198, Japan

[4] PSI, Lab Neutron Scattering & Imaging LNS, CH-5232 Villigen, Switzerland

[5] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[6] Japan Sci & Technol Agcy JST, PRESTO, Chiyoda Ku, Tokyo 1020075, Japan

[7] CROSS, Tokai, Ibaraki 3191106, Japan

[8] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778561, Japan

[9] Univ Tokyo, Tokyo Coll, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 01期

关键词：

HETEROSTRUCTURE;

D O I：

10.1103/PhysRevLett.123.016804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a proximity-driven large anomalous Hall effect in all-telluride heterostructures consisting of the ferromagnetic insulator Cr2Ge2Te6 and topological insulator (Bi, Sb)(2)Te-3. Despite small magnetization in the (Bi, Sb)(2)Te-3 layer, the anomalous Hall conductivity reaches a large value of 0.2e(2)/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 Cr(2)Ge(2)Te(6 )layer is effective and strong enough to open the sizable exchange gap in the surface state.

引用

页数：6

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