Researchers at the University of Gothenburg Physics Department have finally found the secret to synchronize an unlimited number of spintronic oscillators. Such devices are very promising for future applications requiring wideband functionality.
Unfortunately, such nanoscale microwave oscillators suffer from an unbearably low power and high phase noise. It is generally accepted that one of the most attractive ways to solve this issue is to synchronize a large number of these nanoscopic oscillators in order to limit the detrimental influence of thermal energy.
The synchronization of two such oscillators was first published in 2005. However, by 2013 the number of synchronized oscillators had only increased to four low-frequency oscillators and three microwave-frequency oscillators. Furthermore, the coupling was difficult to control in a reproducible manner.
PhD student Afshin Houshang and his supervisor Dr. Randy Dumas in Professor Johan Åkerman's team have now succeeded in demonstrating that it is possible to create and utilize focused beams of spin waves to (i) synchronize oscillators over much larger distances than shown previously and (ii) robustly synchronize a record number of oscillators.
In their article, published in Nature Nanotechnology, they synchronize five oscillators and demonstrate the resulting improvement in the oscillator quality.
Because we now know how to control the spin wave propagation, there is really no limit to how many oscillators we can now synchronize, said Randy Dumas, who sees great potential in several research areas.
Since the direction of the spin wave beam can also be tailored via electrical current through the oscillator and via an external magnetic field, the results will also have a major impact in the burgeoning field of spin wave based electronics, termed magnonics. By changing the direction of the beam, one can choose which oscillators synchronize and thereby control the flow of information in magnonic circuits in a way that was not possible before.
The results also open up new opportunities for fundamental studies of networks of strongly nonlinear oscillators where an array of perhaps a hundred such oscillators in different geometric architectures can be externally controlled and studied in detail.
We hope to use these and similar components for extremely fast neuromorphic calculations based on oscillator networks explains Randy.
Johan Åkerman, Professor at the University of Gothenburg, Physics Department.
+46 70-710 4360, firstname.lastname@example.org
Calle Björned | idw - Informationsdienst Wissenschaft
Exotic spiraling electrons discovered by physicists
19.02.2019 | Rutgers University
Astronomers publish new sky map detecting hundreds of thousands of previously unknown galaxies
19.02.2019 | Universität Bielefeld
For the first time, an international team of scientists based in Regensburg, Germany, has recorded the orbitals of single molecules in different charge states in a novel type of microscopy. The research findings are published under the title “Mapping orbital changes upon electron transfer with tunneling microscopy on insulators” in the prestigious journal “Nature”.
The building blocks of matter surrounding us are atoms and molecules. The properties of that matter, however, are often not set by these building blocks...
Scientists at the University of Konstanz identify fierce competition between the human immune system and bacterial pathogens
Cell biologists from the University of Konstanz shed light on a recent evolutionary process in the human immune system and publish their findings in the...
Laser physicists have taken snapshots of carbon molecules C₆₀ showing how they transform in intense infrared light
When carbon molecules C₆₀ are exposed to an intense infrared light, they change their ball-like structure to a more elongated version. This has now been...
The so-called Abelian sandpile model has been studied by scientists for more than 30 years to better understand a physical phenomenon called self-organized...
Physicists from the University of Basel have developed a new method to examine the elasticity and binding properties of DNA molecules on a surface at extremely low temperatures. With a combination of cryo-force spectroscopy and computer simulations, they were able to show that DNA molecules behave like a chain of small coil springs. The researchers reported their findings in Nature Communications.
DNA is not only a popular research topic because it contains the blueprint for life – it can also be used to produce tiny components for technical applications.
11.02.2019 | Event News
30.01.2019 | Event News
16.01.2019 | Event News
19.02.2019 | Physics and Astronomy
19.02.2019 | Information Technology
19.02.2019 | Physics and Astronomy