Magnetic skyrmion annihilation by quantum mechanical tunneling

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorVlasov, Sergei M.en_US
dc.contributor.authorBessarab, Pavel F.en_US
dc.contributor.authorLobanov, Igor S.en_US
dc.contributor.authorPotkina, Mariia N.en_US
dc.contributor.authorUzdin, Valery M.en_US
dc.contributor.authorJonsson, Hannesen_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorMultiscale Statistical and Quantum Physicsen
dc.date.accessioned2020-09-18T06:46:24Z
dc.date.available2020-09-18T06:46:24Z
dc.date.issued2020-08en_US
dc.description.abstractMagnetic skyrmions are nano-scale magnetic states that could be used in various spintronics devices. A central issue is the mechanism and rate of various possible annihilation processes and the lifetime of metastable skyrmions. While most studies have focused on classical over-the-barrier mechanism for annihilation, it is also possible that quantum mechanical tunneling through the energy barrier takes place. Calculations of the lifetime of magnetic skyrmions in a two-dimensional lattice are presented and the rate of tunneling compared with the classical annihilation rate. A remarkably strong variation in the onset temperature for tunneling and the lifetime of the skyrmion is found as a function of the values of parameters in the extended Heisenberg Hamiltonian, i.e. the out-of-plane anisotropy, Dzyaloshinskii-Moriya interaction and applied magnetic field. Materials parameters and conditions are identified where the onset of tunneling could be observed on a laboratory time scale. In particular, it is predicted that skyrmion tunneling could be observed in the PdFe/Ir(111) system when an external magnetic field on the order of 6Tis applied.en
dc.description.versionPeer revieweden
dc.format.extent8
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationVlasov, S M, Bessarab, P F, Lobanov, I S, Potkina, M N, Uzdin, V M & Jonsson, H 2020, ' Magnetic skyrmion annihilation by quantum mechanical tunneling ', New Journal of Physics, vol. 22, no. 8, 083013 . https://doi.org/10.1088/1367-2630/ab9f6den
dc.identifier.doi10.1088/1367-2630/ab9f6den_US
dc.identifier.issn1367-2630
dc.identifier.otherPURE UUID: 455d4edd-f8b1-448a-b898-14d22d4af84aen_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/455d4edd-f8b1-448a-b898-14d22d4af84aen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/51421790/Vlasov_2020_New_J._Phys._22_083013_1.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/46504
dc.identifier.urnURN:NBN:fi:aalto-202009185440
dc.language.isoenen
dc.publisherIOP Publishing Ltd.
dc.relation.ispartofseriesNew Journal of Physicsen
dc.relation.ispartofseriesVolume 22, issue 8en
dc.rightsopenAccessen
dc.subject.keywordskyrmionen_US
dc.subject.keywordtunnelingen_US
dc.subject.keywordlifetimeen_US
dc.subject.keywordinstantonen_US
dc.subject.keywordSTATESen_US
dc.subject.keywordTRANSITIONen_US
dc.titleMagnetic skyrmion annihilation by quantum mechanical tunnelingen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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