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<p>A layered ferromagnet Cr<sub>2</sub>Te<sub>3</sub> is attracting growing interest because of its unique electronic and magnetic properties. Studies have shown that it exhibits a sizable anomalous Hall effect (AHE) that changes sign with temperature. The origin of the AHE and the sign change, however, remains elusive. Here we show experimentally that electron-magnon scattering significantly contributes to the AHE in Cr<sub>2</sub>Te<sub>3</sub> through magnon-induced skew scattering, and that the sign change is caused by the competition with the Berry-curvature or impurity-induced side-jump contribution. The electron-magnon skew scattering is expected to arise from the exchange interaction between the itinerant Te <i>p</i>-electrons and the localized Cr <i>d</i>-electrons modified by the strong spin-orbit coupling on Te. These results suggest that the magnon-induced skew scattering can dominate the AHE in layered ferromagnets with heavy elements.</p>

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Significant electron-magnon scattering in layered ferromagnet Cr2Te3

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月20日

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  • Yujun Wang,
  • Shunzhen Wang,
  • Masashi Kawaguchi,
  • Jun Uzuhashi,
  • Akhilesh Kumar Patel,
  • Kenji Nawa,
  • Yuya Sakuraba,
  • Tadakatsu Ohkubo,
  • Hiroshi Kohno,
  • Masamitsu Hayashi

摘要

A layered ferromagnet Cr2Te3 is attracting growing interest because of its unique electronic and magnetic properties. Studies have shown that it exhibits a sizable anomalous Hall effect (AHE) that changes sign with temperature. The origin of the AHE and the sign change, however, remains elusive. Here we show experimentally that electron-magnon scattering significantly contributes to the AHE in Cr2Te3 through magnon-induced skew scattering, and that the sign change is caused by the competition with the Berry-curvature or impurity-induced side-jump contribution. The electron-magnon skew scattering is expected to arise from the exchange interaction between the itinerant Te p-electrons and the localized Cr d-electrons modified by the strong spin-orbit coupling on Te. These results suggest that the magnon-induced skew scattering can dominate the AHE in layered ferromagnets with heavy elements.