CUED Publications database

On-chip hybrid Superconducting-Semiconducting Circuit

Delfanazari, K and Puddy, R and Ma, P and Yi, T and Cao, M and Richardson, CL and Farrer, I and Ritchie, DA and Joyce, H and Kelly, M and Smith, CG (2018) On-chip hybrid Superconducting-Semiconducting Circuit. IEEE Transactions on Applied Superconductivity, 28. ISSN 1051-8223

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Abstract

In this paper, we experimentally demonstrate a hybrid superconducting-semiconducting (S-Sm) circuit consisting of eight planar and ballistic Nb-In0.75Ga0.25As-Nb Josephson junctions. E-beam lithography was used to fabricate the Josephson junctions on an InGaAs chip. In contrast to our previous studies on long junctions that were fabricated by photolithography, in this study, we observe the induced superconductivity in an In0.75Ga0.25As quantum well at higher temperatures, between T= 0.3 and 1.4 K (3He cryostat temperature range). The induced superconducting gap of & #x0394;ind= 0.65 meV was measured at lowest base temperature T= 300 mK. The effect of temperature and magnetic fields B on the induced superconductivity are presented. Our results suggest that our In0.75Ga0.25As heterojunctions is a promising scalable material system for quantum processing and computing applications.

Item Type: Article
Uncontrolled Keywords: Josephson junctions quantum computing hybrid superconductor-semiconductor junction on-chip quantum circuits
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Div A > Energy
Depositing User: Cron Job
Date Deposited: 26 Feb 2018 20:25
Last Modified: 21 Nov 2020 03:23
DOI: 10.1109/TASC.2018.2812817