Home > Publications database > Magnetic hopfions in solids > print

001     911320
005     20230123110734.0
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100 1 _ |a Rybakov, Filipp N.
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245 _ _ |a Magnetic hopfions in solids
260 _ _ |a Melville, NY
|c 2022
|b AIP Publ.
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520 _ _ |a Hopfions are an intriguing class of string-like solitons, named according to a classical topological concept classifying three-dimensional direction fields. The search for hopfions in real physical systems has been ongoing for nearly half a century, starting with the seminal work of Faddeev. However, so far, realizations in bulk solids are missing. Here, we show that hopfions appear as emergent particles of the classical Heisenberg model with competing exchange interactions. This requires going beyond the model approach used in prior work and deriving a general micromagnetic energy functional directly from a spin-lattice Hamiltonian. We present a definite parameter space in which the existence of hopfions is possible. This opens a concrete vista to combine computational approaches such as density functional theory with material informatics to find magnetic crystals that can host hopfions. As proof of principle, we show how zero-field hopfions can be visualized by the means of off-axis electron holography in a transmission electron microscope.
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700 1 _ |a Kiselev, Nikolai S.
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700 1 _ |a Borisov, Aleksandr B.
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700 1 _ |a Döring, Lukas
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700 1 _ |a Melcher, Christof
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700 1 _ |a Blügel, Stefan
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773 _ _ |a 10.1063/5.0099942
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856 4 _ |u https://juser.fz-juelich.de/record/911320/files/Invoice_APM22-AR-3DMN2022-00360_01063.pdf
856 4 _ |u https://juser.fz-juelich.de/record/911320/files/5.0099942.pdf
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910 1 _ |a Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
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910 1 _ |a Department of Physics, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
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910 1 _ |a Independent Researcher, 68b Amundsen Street, Ekaterinburg 620146, Russia
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910 1 _ |a Department of Mathematics and JARA FIT, RWTH Aachen University, 52056 Aachen, Germany
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910 1 _ |a Department of Mathematics and JARA FIT, RWTH Aachen University, 52056 Aachen, Germany
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