Integrated quantized electronics: a semiconductor quantized voltage source

TL;DR

This paper introduces a novel semiconductor device that generates quantized voltages by integrating a single electron pump with a quantum Hall device, enabling fundamental electrical unit measurements based on natural constants.

Contribution

It presents the first semiconductor-based quantized voltage source combining a single electron pump and quantum Hall effect in a monolithic device.

Findings

Generated quantized voltages of several microvolts

Device scalability using current technology

Potential to close the quantum metrological triangle

Abstract

The Josephson effect in superconductors links a quantized output voltage Vout = f \cdot(h/2e) to the natural constants of the electron's charge e, Planck's constant h, and to an excitation frequency f with important applications in electrical quantum metrology. Also semiconductors are routinely applied in electrical quantum metrology making use of the quantum Hall effect. However, despite their broad range of further applications e.g. in integrated circuits, quantized voltage generation by a semiconductor device has never been obtained. Here we report a semiconductor quantized voltage source generating quantized voltages Vout = f\cdot(h/e). It is based on an integrated quantized circuit of a single electron pump operated at pumping frequency f and a quantum Hall device monolithically integrated in series. The output voltages of several \muV are expected to be scalable by orders of magnitude using present technology. The device might open a new route towards the closure of the quantum metrological triangle. Furthermore it represents a universal electrical quantum reference allowing to generate quantized values of the three most relevant electrical units of voltage, current, and resistance based on fundamental constants using a single device.