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Josephson effect through magnetic skyrmions

Yokoyama, Takehito; Linder, Jacob
Journal article, Peer reviewed
Submitted version
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skyrmion.pdf (255.2Kb)
Permanent lenke
http://hdl.handle.net/11250/2465097
Utgivelsesdato
2015
Metadata
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  • Institutt for fysikk [1807]
  • Publikasjoner fra CRIStin - NTNU [20842]
Originalversjon
10.1103/PhysRevB.92.060503
Sammendrag
We discover that the multiple degrees of freedom associated with magnetic skyrmions—size, position, and helicity—can all be used to control the Josephson effect and

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−

π

transitions occurring in superconductor/magnetic skyrmion/superconductor junctions. In the presence of two skyrmions, the Josephson effect depends strongly on their relative helicity and leads to the possibility of a helicity-transistor effect for the supercurrent, where the critical current is changed by several orders of magnitude simply by reversing the helicity of a magnetic skyrmion. Moreover, we demonstrate that the Fraunhofer pattern can show a local minimum at zero flux as a direct result of the skyrmion magnetic texture. These findings demonstrate the rich physics that emerges when combining topological magnetic objects with superconductors and could lead to different perspectives in superconducting spintronics.
Utgiver
American Physical Society
Tidsskrift
Physical Review B. Condensed Matter and Materials Physics

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