Abstract：
:We consider synchronization properties of arrays of spin-torque nano-oscillators coupled via an RC load. We show that while the fully synchronized state of identical oscillators may be locally stable in some parameter range, this synchrony is not globally attracting. Instead, regimes of different levels of compositional complexity are observed. These include chimera states (a part of the array forms a cluster while other units are desynchronized), clustered chimeras (several clusters plus desynchronized oscillators), cluster state (all oscillators form several clusters), and partial synchronization (no clusters but a nonvanishing mean field). Dynamically, these states are also complex, demonstrating irregular and close to quasiperiodic modulation. Remarkably, when heterogeneity of spin-torque oscillators is taken into account, dynamical complexity even increases: close to the onset of a macroscopic mean field, the dynamics of this field is rather irregular.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zaks M,Pikovsky Adoi
10.1038/s41598-017-04918-9subject
Has Abstractpub_date
2017-07-05 00:00:00pages
4648issue
1issn
2045-2322pii
10.1038/s41598-017-04918-9journal_volume
7pub_type
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