Topological Hall signatures of magnetic hopfions

Börge Göbel*, Collins Ashu Akosa, Gen Tatara, Ingrid Mertig

*この研究の対応する著者

研究成果査読

11 被引用数 (Scopus)

抄録

Magnetic hopfions are topologically protected three-dimensional solitons that are constituted by a tube which exhibits a topologically nontrivial spin texture in the cross-section profile and is closed to a torus. Here we show that the hopfion's locally uncompensated emergent field leads to a topological Hall signature, although the topological Hall effect vanishes on the global level. The topological Hall signature is switchable by magnetic fields or electric currents and occurs independently of the anomalous and conventional Hall effects. It can therefore be exploited to electrically detect hopfions in experiments and even to distinguish them from other textures like skyrmion tubes. Furthermore, it can potentially be utilized in spintronic devices. Exemplarily, we propose a hopfion-based racetrack data storage device and simulate the electrical detection of the hopfions as carriers of information.

本文言語English
論文番号013315
ジャーナルPhysical Review Research
2
1
DOI
出版ステータスPublished - 2020 3
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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