期刊
NATURE ELECTRONICS
卷 5, 期 11, 页码 735-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41928-022-00866-z
关键词
-
资金
- National Natural Science Foundation of China (NSFC) [52271235, 52121001]
- NSFC on the Science Foundation Ireland (SFI)-NSFC Partnership Programme (NSFC) [51861135104]
- Ministry of Education of the Czech Republic [LM2018110]
- Grant Agency of the Czech Republic [19-28375X]
- EU FET Open RIA grant [766566]
- LNSM-LNSpin
- National Grid Infrastructure MetaCentrum [CESNET LM2015042]
- Alexander von Humboldt Foundation
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [TRR 173-268565370]
This study reports an anomalous Hall effect in collinear altermagnetic ruthenium dioxide, with an anomalous Hall conductivity exceeding 1,000 omega(-1) cm(-1). The phenomenon arises from an alternative magnetic phase in RuO2, characterized by alternating spin polarization in both real-space crystal structure and momentum-space band structure. The results could potentially lead to the exploration of topological Berry phases and dissipationless quantum transport in crystals of abundant elements and with a compensated antiparallel magnetic order.
The anomalous Hall effect is a time-reversal symmetry-breaking magneto-electronic phenomenon originally discovered in ferromagnets. Recently, ruthenium dioxide (RuO2) with a compensated antiparallel magnetic order has been predicted to generate an anomalous Hall effect of comparable strength to ferromagnets. The phenomenon arises from an altermagnetic phase of RuO2 with a characteristic alternating spin polarization in both real-space crystal structure and momentum-space band structure. Here we report an anomalous Hall effect in RuO2 with an anomalous Hall conductivity exceeding 1,000 omega(-1) cm(-1). We combine the vector magnetometry and magneto-transport measurements of epitaxial RuO2 films of different crystallographic orientations. We show that the anomalous Hall effect dominates over an ordinary Hall contribution, and a contribution due to a weak field-induced magnetization. Our results could lead to the exploration of topological Berry phases and dissipationless quantum transport in crystals of abundant elements and with a compensated antiparallel magnetic order. By combining vector magnetometry and magneto-transport measurements of epitaxial films with different crystallographic orientations, an anomalous Hall effect can be measured in collinear altermagnetic ruthenium dioxide with an anomalous Hall conductivity exceeding 1,000 omega(-1) cm(-1).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据