Nanowerk April 15, 2024 Metrological applications of the quantum anomalous Hall effect are currently restricted by the need for low measurement currents and low temperatures. Researchers in Germany developed a measurement scheme that increases the robustness of a zero-magnetic-field quantum anomalous Hall resistor and extends its operating range to higher currents. In the scheme, they simultaneously injected current into two disconnected perimeters of a multi-terminal Corbino device to balance the electrochemical potential between the edges. This screened the electric field that drove backscattering through the bulk and thus improved the stability of the quantization at increased currents. According to the […]
Category Archives: Resistors
This Artificial Synapse Can Run a Million Times Faster Than Ones in The Human Brain
Science Alert August 12, 2022 The speed of biological information processing in neurons and synapses is limited by the aqueous medium through which weak action potentials of about 100 millivolts propagate over milliseconds. Researchers at MIT generated silicon-compatible nanoscale protonic programmable resistors with highly desirable characteristics under extreme electric fields. This enabled controlled shuttling and intercalation of protons in nanoseconds at room temperature in an energy-efficient manner. The devices showed symmetric, linear, and reversible modulation characteristics with many conductance states covering a 20× dynamic range. According to the researchers the space-time-energy performance of the all–solid-state artificial synapses can greatly exceed […]