Composite Topological Excitations in Ferromagnet-Superconductor Heterostructures

Kjetil M. D. Hals; Michael Schecter; Mark S. Rudner

doi:10.1103/PhysRevLett.117.017001

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Composite Topological Excitations in Ferromagnet-Superconductor Heterostructures

Kjetil M. D. Hals, Michael Schecter, Mark S. Rudner

DOI 10.1103/PhysRevLett.117.017001 · Physical Review Letters

T1

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Abstract

We investigate the formation of a new type of composite topological excitation—the Skyrmion-vortex pair (SVP)—in hybrid systems consisting of coupled ferromagnetic and superconducting layers. Spin-orbit interaction in the superconductor mediates a magnetoelectric coupling between the vortex and the Skyrmion, with a sign (attractive or repulsive) that depends on the topological indices of the constituents. We determine the conditions under which a bound SVP is formed and characterize the range and depth of the effective binding potential through analytical estimates and numerical simulations. Furthermore, we develop a semiclassical description of the coupled Skyrmion-vortex dynamics and discuss how SVPs can be controlled by applied spin currents.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
TMD Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3	Pressure not reported	unknown