Critical and excess current through an open quantum dot: Temperature and magnetic field dependence

Abstract

We present measurements of temperature and magnetic field dependence of the critical current and excess current in a carbon nanotube Josephson quantum dot junction. The junction is fabricated in a controlled environment which allows for extraction of the full critical current. The measurements are performed in the open quantum dot regime, and fitted to theory with good qualitative agreement. We also show how to extract level spacing, level broadening, and charging energy of an open quantum dot from a bias spectroscopy plot.

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Cited by in corpus (4)

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• Josephson current through interacting double quantum dots with spin-orbit coupling
• Andreev spin relaxation time in a shadow-evaporated InAs weak link
• Many-body perturbation theory for the superconducting quantum dot: Fundamental role of the magnetic field