Superconductivity induced by interfacial coupling to magnons

Niklas Rohling; Eirik Løhaugen Fjærbu; Arne Brataas

doi:10.1103/PhysRevB.97.115401

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Superconductivity induced by interfacial coupling to magnons

Niklas Rohling, Eirik Løhaugen Fjærbu, Arne Brataas

DOI 10.1103/PhysRevB.97.115401 · Physical Review B

T1

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Abstract

We consider a thin normal metal sandwiched between two ferromagnetic insulators. At the interfaces, the exchange coupling causes electrons within the metal to interact with magnons in the insulators. This electron-magnon interaction induces electron-electron interactions, which in turn can result in p-wave superconductivity. We solve the gap equation numerically and estimate the critical temperature. In yttrium iron garnet (YIG)-Au-YIG trilayers, superconductivity sets in at temperatures somewhere in the interval between 1 and 10 K. EuO-Au-EuO trilayers require a lower temperature, in the range from 0.01 to 1 K.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YIG-Au-YIG Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	10	Pressure not reported	onset
EuO-Au-EuO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1	Pressure not reported	onset