Designing Large Arrays of Interacting Spin-Torque Nano-Oscillators for Microwave Information Processing

Talatchian, Philippe; Romera, M.; Araujo, Flavio Abreu; Bortolotti, Paolo; Cros, Vincent; Vodenicarevic, Damir; Locatelli, Nicolas; Querlioz, Damien; Grollier, Julie

doi:10.1103/physrevapplied.13.024073

Cited by 13 publications

(3 citation statements)

References 32 publications

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“…This approach is scalable to several hundreds of oscillators, as shown in ref. 29 . The microwave signal emitted by the coupled system is recorded by a spectrum analyzer.…”

Section: Methodsmentioning

confidence: 99%

Binding events through the mutual synchronization of spintronic nano-neurons

et al. 2022

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The brain naturally binds events from different sources in unique concepts. It is hypothesized that this process occurs through the transient mutual synchronization of neurons located in different regions of the brain when the stimulus is presented. This mechanism of ‘binding through synchronization’ can be directly implemented in neural networks composed of coupled oscillators. To do so, the oscillators must be able to mutually synchronize for the range of inputs corresponding to a single class, and otherwise remain desynchronized. Here we show that the outstanding ability of spintronic nano-oscillators to mutually synchronize and the possibility to precisely control the occurrence of mutual synchronization by tuning the oscillator frequencies over wide ranges allows pattern recognition. We demonstrate experimentally on a simple task that three spintronic nano-oscillators can bind consecutive events and thus recognize and distinguish temporal sequences. This work is a step forward in the construction of neural networks that exploit the non-linear dynamic properties of their components to perform brain-inspired computations.

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“…This approach is scalable to several hundreds of oscillators, as shown in ref. 29 . The microwave signal emitted by the coupled system is recorded by a spectrum analyzer.…”

Section: Methodsmentioning

confidence: 99%

Binding events through the mutual synchronization of spintronic nano-neurons

et al. 2022

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“…A practical STNO-array based device will probably require current from a single source distributed to each oscillator through parallel or series connections. These devices will find applications as sources in nanoscale phase-locked arrays 293 , which could be used in wireless chip-to-chip or intra-chip communications. SHNOs can be more advantageous due to easy integration on Si substrate and the exploitation of pure spin current with better energy efficiency.…”

Section: D Waveguide (D)mentioning

confidence: 99%

Magnetization dynamics of nanoscale magnetic materials: A perspective

Barman

Mondal

Sahoo

et al. 2020

Journal of Applied Physics

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Nanomagnets form the building blocks for a gamut of miniaturized energyefficient devices including data storage, memory, wave-based computing, sensors and biomedical devices. They also offer a span of exotic phenomena and stern challenges. The rapid advancements of nanofabrication, characterization and numerical simulations during last two decades have made it possible to explore a plethora of science and technology related to nanomagnet dynamics. The progress in the magnetization dynamics of single nanomagnets and one-and two-dimensional arrays of nanostructures in the form of dots, antidots, nanoparticles, binary and bicomponent structures and patterned multilayers have been presented in details.Progress in unconventional and new structures like artificial spin ice and three-dimensional nanomagnets and spin textures like domain walls, vortex and skyrmions have been presented. Furthermore, a huge variety of new topics in the magnetization dynamics of magnetic nanostructures are rapidly emerging. An overview of the steadily evolving topics like spatiotemporal imaging of fast dynamics of nanostructures, dynamics of spin textures, artificial spin ice have been discussed. In addition, dynamics of contemporary and newly transpired magnetic architectures such as nanomagnet arrays with complex basis and symmetry, magnonic quasicrystals, fractals, defect structures, novel three-dimensional structures have been introduced. Effects of various spin-orbit coupling and ensuing spin textures as well as quantum hybrid systems comprising of magnon-photon, magnon-phonon and magnon-magnon coupling, antiferromagnetic nanostructures are rapidly growing and are expected to dominate this research field in the coming years. Finally, associated topics like nutation dynamics and nanomagnet antenna are briefly discussed. Despite showing a great progress, only a small fraction of nanomagnetism and its ancillary topics have been explored so far and huge efforts are envisaged in this evergrowing research area in the generations to come.

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“…Hence, a realization of the SOTMI state by relying on recent advances in atomic-scale magnonic crystals 41 , in magnetic silicene 42 , in van der Waals magnets 32 such as CrI 3 43 or magnetic organic materials 44 , may find application in nanoscale exchange magnonics. One may also abandon the atomic scale and implement SOTMIs in magnonic metamaterials built from three-dimensional coupled arrays of spin torque oscillators 45 , magnetic vortex structures 46 , magnonic quantum networks 47 , or superconducting spin qubits 48 . In particular, one may stack two-dimensional topological magnonic crystals realized either as iron islands in an yttrium iron garnet matrix 5 or as a patterned ferrimagnetic insulator 49 .…”

mentioning

confidence: 99%

Chiral Hinge Magnons in Second-Order Topological Magnon Insulators

Mook,

Díaz,

Klinovaja

et al. 2020

Preprint

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When interacting spins in condensed matter order ferromagnetically, their ground state wave function is topologically trivial. Nonetheless, in two dimensions, the ferromagnetic state can support spin excitations with nontrivial topology, an exotic state known as topological magnon insulator (TMI). Here, we theoretically unveil and numerically confirm a novel ferromagnetic state in three dimensions dubbed second-order TMI, whose hallmarks are excitations at its hinges, where facets intersect. Since ferromagnetism naturally comes with broken time-reversal symmetry, the hinge magnons are chiral, rendering backscattering impossible. Hence, they trace out a three-dimensional path about the sample unimpeded by defects and are topologically protected by the spectral gap. They are remarkably robust against disorder and simultaneously highly tunable by atomic-level engineering of the sample termination. Our findings empower magnonics with the tools of higherorder topology, a promising route to combine low-energy information transfer free of Joule heating with three-dimensional vertical integration.

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Designing Large Arrays of Interacting Spin-Torque Nano-Oscillators for Microwave Information Processing

Cited by 13 publications

References 32 publications

Binding events through the mutual synchronization of spintronic nano-neurons

Binding events through the mutual synchronization of spintronic nano-neurons

Magnetization dynamics of nanoscale magnetic materials: A perspective

Chiral Hinge Magnons in Second-Order Topological Magnon Insulators

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