Room-temperature terahertz anomalous Hall effect in Weyl antiferromagnet Mn₃Sn thin films

• MATSUDA Takuya

  The institute for Solid State Physics, The University of Tokyo

• HIGO Tomoya

  The institute for Solid State Physics, The University of Tokyo

• KANDA Natsuki

  The institute for Solid State Physics, The University of Tokyo

• MATSUNAGA Ryusuke

  The institute for Solid State Physics, The University of Tokyo

Bibliographic Information

Other Title

• ワイル反強磁性金属Mn₃Sn薄膜の室温テラヘルツ異常ホール効果
• ワイル反強磁性金属Mn₃Sn薄膜の室温テラヘルツ異常ホール効果
• ワイル ハン キョウジセイ キンゾク Mn ₃ Sn ハクマク ノ シツオン テラヘルツ イジョウ ホール コウカ

Abstract

Antiferromagnets are promising materials for realizing ultrafast spintronic devices because their spin precession motions can be driven at terahertz frequencies. But the readout of the antiferromagnetic spin order is difficult due to the vanishingly-small net magnetization. A noncollinear Weyl antiferromagnetic metal Mn₃Sn shows a large anomalous Hall effect comparable to ferromagnets owing to broken time-reversal symmetry by the cluster spin multipole on the Kagome bilayer at room temperature. We report on observations of the terahertz anomalous Hall effect in high-quality Mn₃Sn thin films by polarization-resolved terahertz spectroscopy and found that the nondissipative large anomalous Hall currents appear up to approximately 1 THz. Our observation of the large response paves the way for ultrafast terahertz readout of antiferromagnetism.

Journal

• Oyo Buturi

  Oyo Buturi 90 (12), 752-756, 2021-12-01

  The Japan Society of Applied Physics

Details

• CRID: 1390008764025707136
• NII Article ID: 130008123112
• NII Book ID: AN00026679
• DOI: 10.11470/oubutsu.90.12_752
• ISSN: 21882290
• ISSN: 03698009
• NDL BIB ID: 031853012
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I031853012
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed