Critical Current 0−π Transition in Designed Josephson Quantum Dot Junctions
Nano Letters2007Vol. 7(8), pp. 2441–2445
Citations Over TimeTop 10% of 2007 papers
Abstract
We report on quantum dot based Josephson junctions designed specifically for measuring the supercurrent. From high-accuracy fitting of the current-voltage characteristics, we determine the full magnitude of the supercurrent (critical current). Strong gate modulation of the critical current is observed through several consecutive Coulomb blockade oscillations. The critical current crosses zero close to, but not at, resonance due to the so-called 0-pi transition in agreement with a simple theoretical model.
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