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001005589 1001_ $$0P:(DE-Juel1)180392$$aGhosh, Sumit$$b0$$eCorresponding author
001005589 245__ $$aUltrafast optical generation of antiferromagnetic meron-antimeron pairs with conservation of topological charge
001005589 260__ $$aCollege Park, MD$$bAPS$$c2023
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001005589 520__ $$aWe propose a new mechanism to produce a meron-antimeron pair in a two dimensional antiferromagnet with an ultrafast laser pulse via thermal Schwinger mechanism. Unlike ultrafast skyrmion nucleation, this process conserves total topological charge. We systematically show different stages of the dynamics and define proper topological invariants to characterise the configurations. The emergent structure can retain its topological structure for up to 100ps. By introducing a topological structure factor we show that pair formation is robust against any random choice of initial magnetic configuration and can survive against disorder. Our findings demonstrate that the rich world of spin textures, which goes beyond conventional skyrmions, can be reached optically.
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001005589 536__ $$0G:(GEPRIS)437337265$$aDFG project 437337265 - Spin+Optik: Theoretischer Entwurf von antiferromagnetischer Optospintronik (A11) (437337265)$$c437337265$$x2
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001005589 7001_ $$0P:(DE-Juel1)130548$$aBlügel, Stefan$$b1
001005589 7001_ $$0P:(DE-Juel1)130848$$aMokrousov, Yuriy$$b2
001005589 773__ $$0PERI:(DE-600)3004165-X$$a10.1103/PhysRevResearch.5.L022007$$gVol. 5, no. 2, p. L022007$$n2$$pL022007$$tPhysical review research$$v5$$x2643-1564$$y2023
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