Observation of anomalous Hall effect in a non-magnetic two-dimensional electron system

被引：48

作者：

Maryenko, D. ^{[1
]}

Mishchenko, A. S. ^{[1
]}

Bahramy, M. S. ^{[1
,2
,3
]}

Ernst, A. ^{[4
,5
]}

Falson, J. ^{[2
,3
]}

Kozuka, Y. ^{[2
,3
]}

Tsukazaki, A. ^{[6
]}

Nagaosa, N. ^{[1
,2
,3
]}

Kawasaki, M. ^{[1
,2
,3
]}

机构：

[1] RIKEN Ctr Emergent Matter Sci CEMS, Wako, Saitama 3510198, Japan

[2] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[3] Univ Tokyo, Quantum Phase Elect Ctr QPEC, Tokyo 1138656, Japan

[4] Max Planck Inst Mikrostrukturphys, Weinberg 2, D-06120 Halle, Germany

[5] Johannes Kepler Univ Linz, Inst Theoret Phys, A-4040 Linz, Austria

[6] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9088577, Japan

来源：

NATURE COMMUNICATIONS | 2017年 / 8卷

基金：

日本学术振兴会;

关键词：

SCATTERING;

D O I：

10.1038/ncomms14777

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Anomalous Hall effect, a manifestation of Hall effect occurring in systems without time-reversal symmetry, has been mostly observed in ferromagnetically ordered materials. However, its realization in high-mobility two-dimensional electron system remains elusive, as the incorporation of magnetic moments deteriorates the device performance compared to non-doped structure. Here we observe systematic emergence of anomalous Hall effect in various MgZnO/ZnO heterostructures that exhibit quantum Hall effect. At low temperatures, our nominally non-magnetic heterostructures display an anomalous Hall effect response similar to that of a clean ferromagnetic metal, while keeping a large anomalous Hall effect angle theta(AHE)approximate to 20 degrees. Such a behaviour is consistent with Giovannini-Kondo model in which the anomalous Hall effect arises from the skew scattering of electrons by localized paramagnetic centres. Our study unveils a new aspect of many-body interactions in two-dimensional electron systems and shows how the anomalous Hall effect can emerge in a non-magnetic system.

引用

页数：7

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