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024 7 _ |a 10.1103/PhysRevResearch.5.L022007
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100 1 _ |a Ghosh, Sumit
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245 _ _ |a Ultrafast optical generation of antiferromagnetic meron-antimeron pairs with conservation of topological charge
260 _ _ |a College Park, MD
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520 _ _ |a We 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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536 _ _ |a 3D MAGiC - Three-dimensional magnetization textures: Discovery and control on the nanoscale (856538)
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536 _ _ |a DFG project 437337265 - Spin+Optik: Theoretischer Entwurf von antiferromagnetischer Optospintronik (A11) (437337265)
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700 1 _ |a Blügel, Stefan
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700 1 _ |a Mokrousov, Yuriy
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773 _ _ |a 10.1103/PhysRevResearch.5.L022007
|g Vol. 5, no. 2, p. L022007
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|t Physical review research
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|y 2023
|x 2643-1564
856 4 _ |u https://juser.fz-juelich.de/record/1005589/files/Invoice_INV_23_MAR_010646.pdf
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