Ultrafast laser-driven topological spin textures on a 2D magnet

Abstract

Ultrafast laser excitations provide an efficient and low-power consumption alternative since different magnetic properties and topological spin states can be triggered and manipulated at the femtosecond (fs) regime. However, it is largely unknown whether laser excitations already used in data information platforms can manipulate the magnetic properties of recently discovered two-dimensional (2D) van der Waals (vdW) materials. Here we show that ultrashort laser pulses (30$-$85 fs) can not only manipulate magnetic domains of 2D-XY CrCl${}_3$ ferromagnets, but also induce the formation and control of topological nontrivial meron and antimeron spin textures. We observed that these spin quasiparticles are created within $\sim$100 ps after the excitation displaying rich dynamics through motion, collision and annihilation with emission of spin waves throughout the surface. Our findings highlight substantial opportunities of using photonic driving forces for the exploration of spin textures on 2D magnetic materials towards magneto-optical topological applications.

arXiv commenthttps://www.nature.com/articles/s41524-022-00864-x

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Cited by in corpus (10)

• Breaking through the Mermin-Wagner limit in 2D van der Waals magnets
• Laser-induced topological spin switching in a 2D van der Waals magnet
• Spin Dynamics in van der Waals Magnetic Systems
• Magnetic imaging and domain nucleation in CrSBr down to the 2D limit
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• Topological invariants of vortices, merons, skyrmions, and their combinations in continuous and discrete systems
• Near- and mid-infrared excitation of ultrafast demagnetization in a cobalt multilayer system
• Distinguishing Surface and Bulk Electromagnetism via Their Dynamics in an Intrinsic Magnetic Topological Insulator
• Hybrid-Order Topological Phase And Transition in 1H Transition Metal Compounds
• Coherent Spin-Phonon Coupling in the Layered Ferrimagnet Mn3Si2Te6