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  • Letter
  • Open Access

Controllable spin current in van der Waals ferromagnet Fe3GeTe2

Jiaqi Zhou* and Jean-Christophe Charlier†

  • Institute of Condensed Matter and Nanosciences (IMCN), Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium

  • *jiaqi.zhou@uclouvain.be
  • †jean-christophe.charlier@uclouvain.be
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Phys. Rev. Research 3, L042033 – Published 29 November, 2021

DOI: https://doi.org/10.1103/PhysRevResearch.3.L042033

Abstract

The control of spin current is pivotal for spintronic applications, especially for spin-orbit torque devices. The spin Hall effect is a prevalent method to generate spin current. However, it is difficult to manipulate its spin polarization in a nonmagnet. Recently, the discovery of spin current in ferromagnets offers an opportunity to realize the manipulation. In the present Letter, the spin current in the van der Waals ferromagnet Fe3GeTe2 (FGT) with varying magnetization is theoretically investigated. It has been observed that the spin current in FGT presents a nonlinear behavior with respect to magnetization. In-plane and out-of-plane spin polarizations emerge simultaneously, and the bilayer FGT can even exhibit arbitrary polarization owing to the reduced symmetry. More intriguingly, the correlation between the anomalous Hall effect and spin anomalous Hall effect has been interpreted from the aspect of Berry curvature and spin. This work illustrates that the interplay of magnetism and symmetry can effectively control the magnitude and polarization of the spin current, providing a practical method to realize exotic spin-orbit torques.

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Outline

Information

Phys. Rev. Research 3, L042033– Published 29 November, 2021
  • Received 13 April 2021
  • Revised 3 September 2021
  • Accepted 20 October 2021
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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