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Topological Charge Control of Skyrmion Structure in Frustrated Magnets by Circularly Polarized Light

Mana Miyata1, Jun-ichiro Ohe1,*, and Gen Tatara2

  • 1Department of Physics, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan
  • 2RIKEN Center for Emergent Matter Science (CEMS) and RIKEN Cluster for Pioneering Research (CPR), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

  • *junichirou.ohe@sci.toho-u.ac.jp
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Phys. Rev. Applied 18, 014075 – Published 29 July, 2022

DOI: https://doi.org/10.1103/PhysRevApplied.18.014075

Abstract

The classical Heisenberg model with the J1-J2-J3 interaction forms a skyrmion structure, which is characterized by quantized topological charge. Due to the symmetric interaction, the generated topological charges are randomly distributed in the system, and not controllable intrinsically. Here we show theoretically that manipulation of topological charge can be carried out by applying circularly polarized light, as a result of the mechanism of the topological inverse Faraday effect arising from the coupling of light helicity and topological charge. The effect is expected to be useful for control of the topological charge bit in a skyrmion-based racetrack memory.

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Phys. Rev. Applied 18, 014075– Published 29 July, 2022
  • Received 29 March 2022
  • Revised 3 June 2022
  • Accepted 11 July 2022
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