Resonance phenomena in a nanomagnet coupled to a Josephson junction under external periodic drive

TL;DR

This paper explores resonance phenomena in a nanomagnet-Josephson junction system under periodic drive, deriving an analytical model and demonstrating control over resonances for potential applications.

Contribution

It introduces a universal analytical approach to describe and control resonance peaks in a coupled nanomagnet-Josephson junction system under external periodic signals.

Findings

Additional resonance peaks depend on the periodic signal and junction dynamics

Analytical description matches numerical simulations in the linear regime

Method applicable to junctions with anomalous phase shifts

Abstract

We investigate resonance phenomena in a system consisting of a nanomagnet coupled to a Josephson junction under external periodic drive. The coupling in the system leads to appearance of additional resonance peaks whose properties depend on the periodic signal and Josephson junction dynamics. In the linear regime, we derive an analytical description of the resonance phenomena which is then confirmed by numerical simulations. This analytical method is universal and can be also applied to Josephson junctions with anomalous phase shift in current phase relation. This work provides a new method of controlling the resonances of hybrid structures, which may be interesting for applications.