Distinct magnetotransport and orbital fingerprints of chiral bobbers

Abstract

While chiral magnetic skyrmions have been attracting significant attention in the past years, recently, a new type of a chiral particle emerging in thin films $-$ a chiral bobber $-$ has been theoretically predicted and experimentally observed. Here, based on theoretical arguments, we provide a clear pathway to utilizing chiral bobbers for the purposes of future spintronics by uncovering that these novel chiral states possess inherent transport fingerprints that allow for their unambiguous electrical detection in systems comprising several types of chiral states. We reveal that unique transport and orbital characteristics of bobbers root in the non-trivial magnetization distribution in the vicinity of the Bloch points, and demonstrate that tuning the details of the Bloch point topology can be used to drastically alter the emergent response properties of chiral bobbers to external fields, which bears great potential for engineering chiral dynamics and cognitive computing.

arXiv commentSupplementary available upon request

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• Beyond skyrmions: Review and perspectives of alternative magnetic quasiparticles
• Skyrmion-electronics: Writing, deleting, reading and processing magnetic skyrmions toward spintronic applications
• Spirit: Multifunctional Framework for Atomistic Spin Simulations
• Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures
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• Magnetic Bloch-point hopping in multilayer skyrmions and associated emergent electromagnetic signatures
• Phase-Factor-Controlled Surface Spirals in the Magnetic Conical Phase: The Role of In-Plane Directionality