Topological Josephson Junctions Based on InGaAs Quantum Wells

Delfanazari, K., Serra, L., Ma, P., Farrer, I., Ritchie, D., Joyce, H., Kelly, M. J. and Smith, C. G. (2021) Topological Josephson Junctions Based on InGaAs Quantum Wells. APS March Meeting 2021, 15-19 March 2021.

Abstract

Majorana phases emerge as quantized plateaus in the magnetoconductance of the hybrid junctions based on two-dimensional electron gases (2DEG) under fully out-of-plane magnetic fields. The large transverse Rashba spin-orbit interaction in 2DEG, together with a strong magneto-orbital effect, yield topological phase transitions to nontrivial phases hosting Majorana modes. Such Majorana modes are formed at the ends of 2DEG-based wires with a hybrid superconductor-semiconductor integrity. Here, we report on the experimental observation of such topological phases in Josephson junctions, based on In0.75Ga0.25As 2DEG, by sweeping out-of-plane magnetic fields of as small as B(mT) < 100 and probing the conductance to highlight the characteristic quantized magnetoconductance plateaus.

• Item Type: Conference or Workshop Item
• Additional Information: Abstract published in Bulletin of the American Physical Society Volume 66, Number 1: Abstract: B52.00010.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Delfanazari, Dr Kaveh
• Authors: Delfanazari, K., Serra, L., Ma, P., Farrer, I., Ritchie, D., Joyce, H., Kelly, M. J., and Smith, C. G.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering

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