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The suppression of superconductivity in gated titanium nitride nanowires on silicon substrates can be linked to the relaxation of high-energy electrons and the emission of phonons. The cover shows a false-colour scanning electron microscopy image of a titanium nitride superconducting nanowire (blue) and side gates (yellow) on a silicon substrate. The generated phonons (red) travel through the substrate and efficiently switch the nanowire from a superconducting to a resistive state.
Sales of electric vehicles are surging, but the technology faces challenges in terms of the development of an appropriate charging infrastructure and the ongoing global chip shortage.
The use of electric vehicles has increased substantially in recent years but the development of an appropriate charging infrastructure remains a challenge. Roads with dynamic wireless charging could provide an answer.
Suppression of superconductivity in metallic nanowires due to a gate voltage can be linked to the relaxation of high-energy electrons and not to the presence of electric fields at the superconductor surface.
By optimizing the doping and crystallization behaviour of solution-processed metal halide perovskite thin films, p-channel transistors with mobilities of 50 cm2 V–1 s–1 and on/off ratios of 108 can be fabricated.
Charge trapping mechanisms in molybdenum-disulfide-based transistors can be used to mimic the adaptive behaviour of human eyes, allowing vision sensors to be created with high dynamic range.
Multiple, small computational modules can be combined to create field-programmable gate-array-based stochastic neural network accelerators that are able to solve more complex problems than their individually trained parts.
Neuromorphic hardware designed to implement spiking neural networks for deep learning and artificial intelligence applications can also be used to solve non-cognitive computational tasks such as Monte Carlo methods.
Using a multi-layer metasurface array in which each meta-atom of the metasurface acts as an active artificial neuron, a programmable diffractive deep neural network can be created that directly processes electromagnetic waves in free space for wave sensing and wireless communications.