Descrizione del progetto
Reti di spintronica pionieristiche inaugurano una nuova era di scoperte
La spintronica, o elettronica del trasporto di spin, si basa sull’impiego di spin elettronici e momenti magnetici di materiali in aggiunta a carica elettrica convenzionale. I dispositivi di spintronica sono promettenti candidati per una nuova generazione di dispositivi a basso consumo energetico con una capacità di memoria e una velocità maggiori. Tra di essi vi sono i nano-oscillatori spin-Hall. Questi oscillatori spintronici per la generazione di segnali a microonde e calcolo neuromorfico hanno proprietà che consentono la sincronizzazione su larga scala in catene e sistemi 2D. Il progetto TOPSPIN, finanziato dall’UE, sta sviluppando nano-oscillatori spin-Hall con caratteristiche prestazionali senza precedenti, combinandoli in catene reciprocamente sincronizzate e architetture 2D e persino 3D. I nuovi sistemi apriranno le porte a una nuova era di innovazione spintronica.
Obiettivo
TOPSPIN will focus on spin Hall nano-oscillators (SHNOs), which are nano-sized, ultra-tunable, and CMOS compatible spin wave based microwave oscillators. TOPSPIN will push the boundaries of SHNO lithography, frequency, speed, and power consumption by combining topological insulators, having record high spin Hall efficiencies, with materials having ultra-high spin wave frequencies. TOPSPIN will reduce the required current densities 1-2 orders of magnitude compared to state-of-the-art, making SHNO operating currents approach 1 uA, and increase the SHNO operating frequencies an order of magnitude to as high as 300 GHz.
TOPSPIN will use mutually synchronized SHNOs to achieve orders of magnitude higher signal coherence and achieve novel functionality such as pattern matching and neuromorphic computing. TOPSPIN will demonstrate mutual synchronization of up to 1,000 SHNOs in chains, and as many as 1,000,000 SHNOs in very large-scale two-dimensional arrays. Using dipolar coupling between SHNOs fabricated on top of each other, three-dimensional mutual synchronization will also be demonstrated. As the signal coherence increases linearly with the number of mutually synchronized SHNOs the oscillator quality factor will improve by many orders of magnitude. TOPSPIN will also develop such arrays using magnetic tunnel junction stacks thus combining ultra-high coherence with the highest possible microwave output power.
TOPSPIN will demonstrate ultrafast pattern matching and neuromorphic computing using its SHNO networks. It will functionalize SHNOs to exhibit ultra-fast individual voltage controlled tuning and non-volatile tuning of both the SHNO frequency and the inter-SHNO coupling.
TOPSPIN will characterize its SHNOs using novel methods and techniques such as multichannel electrical measurements, time- and phase-resolved Brillouin Light Scattering microscopy, time-resolved Scanning Transmission X-ray Microscopy, and ultrafast pump-probe Transmission Electron Microscopy.
Campo scientifico
Parole chiave
Programma(i)
Argomento(i)
Meccanismo di finanziamento
ERC-ADG - Advanced GrantIstituzione ospitante
405 30 Goeteborg
Svezia