Radio-frequency characterization of a supercurrent transistor made of a carbon nanotube

Mergenthaler, M and Schupp, F J and Nersisyan, A. and Ares, N and Baumgartner, A. and Schönenberger, C. and Briggs, G. A. D. and Leek, P J and Laird, Edward (2021) Radio-frequency characterization of a supercurrent transistor made of a carbon nanotube. Materials for Quantum Technology, 1.

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Abstract

A supercurrent transistor is a superconductor–semiconductor hybrid device in which the Josephson supercurrent is switched on and off using a gate voltage. While such devices have been studied using DC transport, radio-frequency measurements allow for more sensitive and faster experiments. Here a supercurrent transistor made from a carbon nanotube is measured simultaneously via DC conductance and radio-frequency reflectometry. The radio-frequency measurement resolves all the main features of the conductance data across a wide range of bias and gate voltage, and many of these features are seen more clearly. These results are promising for measuring other kinds of hybrid superconducting devices, in particular for detecting the reactive component of the impedance, which a DC measurement can never detect.

Item Type:
Journal Article
Journal or Publication Title:
Materials for Quantum Technology
ID Code:
158276
Deposited By:
Deposited On:
13 Aug 2021 09:05
Refereed?:
Yes
Published?:
Published
Last Modified:
07 Jul 2022 00:57