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 uncover 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 spintronics applications and cognitive computing.Nowadays, chiral magnetic skyrmions are believed to serve as one of the fundamental blocks for future magnetic technologies, such as racetrack memories [1] or artificial neurons [2][3][4]. These fascinating topologically protected chiral particles can be characterized with the quantized flux of the "emergent" magnetic field B em ∼n · (∂ xn × ∂ yn ) (i.e. the density of topological charge) due to the spatially non-trivial distribution of spinsn(x, y). They also display a number of dynamical effects which make them promising potential bits for efficient creation and manipulation by external fields [1,5]. One of the most crucial aspects for the implementation of skyrmionic devices is the ability to distinguish the emergence and dynamics of skyrmions by referring to electronic transport measurements, which are normally associated with the topological Hall effect arising from the presence of B em [6,7]. On the other hand, it was recently predicted theoretically and subsequently confirmed experimentally [8], that in thin films of chiral magnets an intricate interplay of external fields, temperature and exchange interactions can result in the formation of novel chiral particles -chiral bobbers [9]. In contrast to skyrmions that form in tubes [10], chiral bobbers are localized at the surface and manifestly incorporate a so-called Bloch point (BP) into their structure. These are characterized by fast non-adiabatic changes of the local magnetization around them.The experimental discovery of bobbers [8] represents an important milestone in magnetism. While earlier it was assumed that in chiral magnets there is only one type of particlelike objects − skyrmions − the work by Zheng and co-authors shows that the physics of quasiparticles in chiral magnets is significantly richer, and at least two types of particles with different physical properties may coexist in the same sample. Similar to elementary particles such magnetic quasiparticles may interact with each other with attractive or repelling forces controlled by the strength of the external magnetic field. The discovery of a new type of magnetic quasiparticle opens the vista for new research aiming to invest...
The anomalous Hall effect has been indispensable in our understanding of numerous magnetic phenomena. This concerns both ferromagnetic materials, as well as diverse classes of antiferromagnets, where in addition to the anomalous and recently discovered crystal Hall effect, the topological Hall effect in noncoplanar antiferromagnets has been a subject of intensive research in the past decades. Here, we uncover a distinct flavor of the Hall effect emerging in generic canted spin systems. We demonstrate that upon canting, the anomalous Hall effect acquires a contribution which is sensitive to the sense of imprinted vector chirality among spins. We explore the origins and basic properties of corresponding chiral Hall effect, and closely tie it to the symmetry properties of the system. Our findings suggest that the chiral Hall effect and corresponding chiral magneto-optical effects emerge as useful tools in characterizing an interplay of structure and chirality in complex magnets, as well as in tracking their chiral dynamics and fluctuations.
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