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Satoru Nakatsuji
Satoru Nakatsuji
Director / Professor
Trans-scale Quantum Science Institute / Dept. of Physics, University of Tokyo
Research Field: Quantum transport phenomena in topological materials
Satoru Nakatsuji received his Ph.D in Physics from the Kyoto University in Japan in 2001 and then worked as a postdoc at National High Magnetic Field Laboratory in Florida till 2003. After he served as a lecturer of the Department of Physics at Kyoto University, he moved to University of Tokyo as an associate professor of the Institute for Solid State Physics and later became a full professor in 2016. Recently, he joined the faculty of Department of Physics of University of Tokyo as a full professor. He is currently serving as Professor at Department of Physics, Project Professor at ISSP, the Director of Trans-Scale Quantum Science Institute, UTokyo.
Electrical and Strain Manipulation of Large Transverse Responses in Topological Antiferromagnets
Electrical and Strain Manipulation of Large Transverse Responses in Topological Antiferromagnets
Satoru Nakatsuji 1,2,3
Satoru Nakatsuji 1,2,3
1 Department of Physics, School of Science, The University of Tokyo, Tokyo 113-0033, JAPAN
1 Department of Physics, School of Science, The University of Tokyo, Tokyo 113-0033, JAPAN
2 Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, JAPAN
2 Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, JAPAN
3 Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
3 Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Macroscopic responses of magnets are often governed by magnetization and thus have been restricted to ferromagnets. However, such responses are strikingly large in the newly developed topological magnets, breaking the conventional scaling with magnetization. Taking the recently discovered antiferromagnetic Weyl semimetals as a prime example, we highlight the two central ingredients driving the significant macroscopic responses: the Berry curvature enhanced due to nontrivial band topology in momentum space, and the cluster magnetic multipoles in real space. In particular, recent discovery of the magnetic Weyl fermions in the antiferromagnet Mn3Sn has attracted significant attention, as it exhibits various exotic phenomena with robust properties due to the Weyl nodes. Given the prospects of antiferromagnetic (AF) spintronics for realizing high-density devices with ultrafast operation, it would be ideal if one could electrically manipulate an AF Weyl semimetal. After introducing basic properties of the topological magnets, we discuss our recent work on the electrical switching as well as strain manipulation of a Weyl semimetal state and its detection by anomalous Hall effect (AHE). Our observation may well lead to another leap in science and technology for topological magnetism and ultrafast AF spintronics.
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