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Andreev reflections and magnetotransport in 2D Josephson junctions

Delfanazari, K; Ma, P; Puddy, RK; Cao, M; Yi, T; Gul, Y; Farrer, I; ... Smith, CG; + view all (2019) Andreev reflections and magnetotransport in 2D Josephson junctions. In: Proceedings of the 13th Workshop on Low Temperature Electronics (WOLTE-13). IOP Publishing: Bristol, UK. Green open access

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Abstract

In this paper, the subharmonic energy gap structures (SGS) and induced superconductivity, due to multiple Andreev reflections, in indium gallium arsenide (In 0.75 Ga 0.25 As) 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.

Type: Proceedings paper
Title: Andreev reflections and magnetotransport in 2D Josephson junctions
Event: 13th Workshop on Low Temperature Electronics (WOLTE-13), 10-13 September 2018, Sorrento, Italy
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1742-6596/1182/1/012010
Publisher version: https://iopscience.iop.org/issue/1742-6596/1182/1
Language: English
Additional information: © the Authors 2019. Published under licence by IOP Publishing Ltd. Content from this work may be used under the terms of theCreative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10073701
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