Imec has used 300mm wafers to demonstrate silicon-based quantum dot spin qubit processing. The devices had an average charge noise of 0.6µeV/√Hz at 1Hz. “In view of noise performance, the values obtained are the lowest charge noise values achieved on a 300mm fab-compatible platform,” according to the Belgian research lab. “By demonstrating those values, repeatedly and reproducibly this work makes ...
Led by the University of Cambridge, an international team of researchers has created materials in which the spin of un-paired electrons can react with photons at room temperature. “These unpaired spins change the rules for what happens when a photon is absorbed and electrons are moved up to a higher energy level. We’ve been working with systems where there is ...
Electric gate-controlled exchange-bias effect in van der Waals heterostructures has been has observed for the first time, according to RMIT University in Australia, which describes the effect as “a promising platform for future energy-efficient, beyond-CMOS electronics”. “To date, very limited electrically tunable exchange-bias effects have been experimentally demonstrated in some oxide multi-ferroic thin film systems”, according to the university, but ...
Students of spintronics have another spin state to add to their tool box: a 2D material hosting a ‘spiral spin liquid’ – in which magnetic spins form fluctuating corkscrew-like structures. In this case, the material is the van der Waals honeycomb magnet iron trichloride, which has a layer of iron atoms sandwiched between two layers of chlorine atoms, and can ...
Scientists in Australia have opened the door to self-assembling controllable nano-scale electronic and spintronic devices by discovering how magnetism arises in 2-d ‘kagome’ metal-organic frameworks. Kagome materials have repeating pattern of hexagons and smaller triangles, with the hexagons touching at their tips (images below). The word is Japanese, relating to a basket weaving pattern. In this case, the metal-organic is ...
Magnetic tunnel junctions can be used to harvest 2.4GHz RF energy and turn it into dc current, according to researchers at the National University of Singapore (NUS) and Tohoku University who have driven an LED for such a power converter. The devices in question are non-vortex uniformly-magnetised spin-torque oscillators (see diagram) Magnetic sensors have already been constructed from magnetic tunnelling ...
2D spin-logic devices could benefit from magnetic graphene that can efficiently convert charge to spin current, and can transfer this spin-polarisation over long distances, according to the University of Groningen. Graphene is a favoured amongst 2D materials for transporting spin information, but is cannot generate spin current unless its properties are modified – conventionally cobalt ferromagnetic electrodes are used for injecting ...
US researchers have manipulated fixed magnetic skyrmions using voltages, offering a possible route to skyrmion memory. Magnetic skyrmions are self-contained stable spin fields that share some characteristics with particles. They can be only a few nanometres across, and in certain circumstances can be created, destroyed and manipulated with very little energy, leading to them being studied as a possible memory ...
Electrical engineers at the Tokyo University of Science have created a CMOS chip that implements a quantum annealing processor capable of solving the traveling salesman problem for 22 cities in a second. According to the researchers, a conventional 30Goperation/s, high-performance von Neumann architecture CPU that can solve a 16 city travelling salesman problem in 12 minutes, would require about 1,200 years to solve the ...
One of the keys to unlock the potential of spintronics lies in the ability to quickly and efficiently magnetize materials.
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