Volume 5 Issue 9, September 2022

Unreleased acoustic resonators fabricated in commercial fin-field-effect-transistor technology could be used in multigigahertz signal processing.

An artificial neuron is designed to communicate chemically with biological neurons. The artificial neuron can receive and release the neurotransmitter dopamine, enabling adaptive interaction with live neurons and the sciatic nerve in a mouse leg.

The interactions between antiferromagnetic moments and spin currents owing to topological surface states are observed as a combination of magnetoresistance effects and current-induced switching of the magnetic moments. These observations suggest that topological surface states could provide a tool for reading and writing antiferromagnetic memories with ultralow energy consumption.

This Review examines the origin of shape-, confinement- and strain-induced effects in electronic materials with nanoscale curved geometries and explores how to exploit these effects in electronic, magnetic and superconducting devices.

This Review examines the development of micro light-emitting diodes, exploring key performance characteristics, leading manufacturing approaches and current system demonstrations, as well considering the potential future applications of the technology.

The antiferromagnetic moments in the topological insulator/antiferromagnetic insulator bilayer (Bi,Sb)₂Te₃/α-Fe₂O₃ can be reversibly switched using electrical currents at room temperature, and with a critical current density that is one order of magnitude smaller than that required in heavy-metal/magnetic insulator systems.

A method that minimizes strain and doping can be used to fabricate metal contacts to encapsulated ultraclean tungsten diselenide monolayers with contact resistances of 5 kΩ μm and transfer lengths of 1 μm.

An artificial neuron that detects dopamine using a carbon-based electrochemical sensor and then processes the sensory signals using a memristor with synaptic plasticity, before stimulating dopamine release via a heat-responsive hydrogel, can be used to trigger the controllable movement of a mouse leg and robotic hand.

Electronically accessible states in vanadium dioxide can be arbitrarily manipulated on short timescales and tracked beyond 10,000 s after excitation.

A current-driven modulator based on the magneto-optic effect can operate at temperatures as low as 4 K and offer data rates of up to 2 Gbps with an energy consumption below 4 pJ per bit of transferred information.

Unreleased acoustic resonators that are fabricated in 14 nm fin field-effect transistor technology and operate from 8 to 12 GHz can be created using phononic waveguides for acoustic confinement and exploiting metal–oxide–semiconductor capacitors and transistors to electromechanically drive and sense acoustic vibrations.