Title: Superconductivity Induced by Interfacial Coupling to Magnons,
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. In the weak-coupling limit, we solve the gap
equation numerically and estimate the critical temperature. In 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.