Microscopic Theory of Ultrafast Skyrmion Excitation by Light

Abstract

We propose a microscopic mechanism for ultrafast skyrmion photo-excitation via a two-orbital electronic model. In the strong correlation limit the $d$-electrons are described by an effective spin Hamiltonian, coupled to itinerant $s$-electrons via $s-d$ exchange. Laser-exciting the system by a direct coupling to the electric charge leads to skyrmion nucleation on a 100 fs timescale. The coupling between photo-induced electronic currents and magnetic moments, mediated via Rashba spin-orbit interactions, is identified as the microscopic mechanism behind the ultrafast optical skyrmion excitation.

11 pages, 3 figures

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Cited by in corpus (8)

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• Quantum Magnetic Skyrmions on Kondo-type Lattices
• Photomagnetic-Chiral Anisotropy mediated by Chirality-Driven Asymmetric Spin Splitting
• Microscopic theory of current-induced skyrmion transport and its application in disordered spin textures
• Skyrmionic Schrödinger cat states in monoaxial chiral magnets