Andreev reflections and magnetotransport in 2D Josephson junctions

Delfanazari, K. et al. (2019) Andreev reflections and magnetotransport in 2D Josephson junctions. Journal of Physics: Conference Series, 1182, 012010. (doi: 10.1088/1742-6596/1182/1/012010)

Abstract

In this paper, the subharmonic energy gap structures (SGS) and induced superconductivity, due to multiple Andreev reflections, in indium gallium arsenide (In0.75Ga0.25As) two-dimensional electron gas (2DEG) are discussed at different temperatures and magnetic fields. Strong suppression of both SGS and induced gap are observed as a function of temperature and magnetic field. The differential conductance of the Josephson junctions (JJs) as a function of external in-plane magnetic fields shows an asymmetric response to positive and negative magnetic field sweeps with a conductance maximum at close to zero. Our approach to quantum transport studies of the ballistic 2D JJs may open a new road towards scalable and integrated quantum processing and help pave the way for the development of topological circuits for the realization of the next generation of quantum processors.

• Item Type: Articles
• Additional Information: The authors acknowledge financial support from EPSRC.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Delfanazari, Dr Kaveh
• Authors: Delfanazari, K., Ma, P., Puddy, R. K., Cao, M., Yi, T., Gul, Y., Farrer, I., Ritchie, D. A., Joyce, H. J., Kelly, M. J., and Smith, C. G.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Journal of Physics: Conference Series
• Publisher: IOP Publishing Ltd
• ISSN: 1742-6588
• ISSN (Online): 1742-6596
• Copyright Holders: Copyright © 2019 The Authors
• First Published: First published in Journal of Physics: Conference Series 1182:012010
• Publisher Policy: Reproduced under a Creative Commons Licence