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        Quantum dynamics of skyrmions and vortices in antiferromagnets

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        Bachelor_Thesis_J.S.Harms_final.pdf (1.344Mb)
        Publication date
        2017
        Author
        Harms, J.S.
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        Summary
        Skyrmions are magnetic textures, that behave like particles. They exist as excitations within two-dimensional magnetic insulators and are promising candidates for future data storage. There has been a strong rise in interest in skyrmions in recent years, which is encouraged by several experimental observations of skyrmions in various magnetic thin-films. In this thesis we study the quantum mechanical propagation of skyrmions in thin film antiferromagnets, using the finite temperature path integral formalism for spins. Using field theoretical tools like the Faddeev-Popov technique, we treat the coordinate of a skyrmion as a dynamical variable and derive an effective action for the skyrmion position. We find that the spin wave fluctuations around a skyrmion give rise to damping of the skyrmion's motion and also gives rise to effective mass contributions.
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        https://studenttheses.uu.nl/handle/20.500.12932/36122
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