Topological Superconductivity Mediated by Skyrmionic Magnons

Kristian Mæland; Asle Sudbø

doi:10.1103/PhysRevLett.130.156002

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Topological Superconductivity Mediated by Skyrmionic Magnons

Kristian Mæland, Asle Sudbø

DOI 10.1103/PhysRevLett.130.156002 · Physical Review Letters

T1

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Abstract

Topological superconductors are associated with the appearance of Majorana bound states, with promising applications in topologically protected quantum computing. In this Letter, we study a system where a skyrmion crystal is interfaced with a normal metal. Through interfacial exchange coupling, spin fluctuations in the skyrmion crystal mediate an effective electron-electron interaction in the normal metal. We study superconductivity within a weak-coupling approach and solve gap equations both close to the critical temperature and at zero temperature. Special features in the effective electron-electron interaction due to the noncolinearity of the magnetic ground state yield topological superconductivity at the interface.

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