Andreev reflections and magnetotransport in 2D Josephson junctions. (February 2019)

• Record Type: Journal Article
• Authors: Delfanazari, Kaveh; Ma, Pengcheng; Puddy, Reuben K; Cao, Moda; Yi, Teng; Gul, Yilmaz; Farrer, Ian; Ritchie, David A; Joyce, Hannah J; Kelly, Michael J; Smith, Charles G
• Is Part Of: Journal of physics. Volume 1182(2019)
• Publication Date: 2019-02
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1182/1/012010
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: In this paper, the subharmonic energy gap structures (SGS) and induced superconductivity, due to multiple Andreev reflections, in indium gallium arsenide (In0.75 Ga0.25 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.