Robust synchronization of spin-torque oscillators with an LCR load

TL;DR

This paper investigates the synchronization behavior of spin-torque oscillators connected with an LCR load, demonstrating conditions for stable full synchronization and exploring complex clustering phenomena with quasiperiodic or chaotic dynamics.

Contribution

It provides a detailed analysis of synchronization stability and clustering in spin-torque oscillators with an LCR load, highlighting the conditions for robust synchronization and complex dynamics.

Findings

Stable full synchronization occurs over a wide parameter range.

Partial synchronization and clustering lead to quasiperiodic or chaotic dynamics.

Complete synchronization may not always emerge from random initial states.

Abstract

We study dynamics of a serial array of spin-torque-oscillators with a parallel inductor-capacitor-resistor (LCR) load. In a large range of parameters the fully synchronous regime, where all the oscillators have the same state and the output field is maximal, is shown to be stable. However, not always such a robust complete synchronization develops from the random initial state, in many cases nontrivial clustering is observed, with a partial synchronization resulting in a quasiperiodic or chaotic mean field dynamics.