Journal
PHYSICAL REVIEW B
Volume 95, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.054421
Keywords
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Funding
- Advanced Leading Graduate Course for Photon Science (ALPS) of the Japan Society for the Promotion of Science (JSPS)
- JSPS KAKENHI [JP16J04752, JP15H02117]
- National Science Foundation [PHY11-25915]
- Grants-in-Aid for Scientific Research [15H02117, 16J04752] Funding Source: KAKEN
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Controlling electric and magnetic properties of matter by laser beams is actively explored in the broad region of condensed matter physics, including spintronics and magneto-optics. Here we theoretically propose an application of optical and electron vortex beams carrying intrinsic orbital angular momentum to chiral ferro- and antiferromagnets. We analyze the time evolution of spins in chiral magnets under irradiation of vortex beams by using the stochastic Landau-Lifshitz-Gilbert equation. We show that beam-driven nonuniform temperature leads to a class of ring-shaped magnetic defects, what we call skyrmion multiplex, as well as conventional skyrmions. We discuss the proper beam parameters and the optimal way of applying the beams for the creation of these topological defects. Our findings provide an ultrafast scheme of generating topological magnetic defects in a way applicable to both metallic and insulating chiral (anti-) ferromagnets.
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