Critical current 0-π transition in designed josephson quantum dot junctions

H. Ingerslev Jørgensen*, T. Novotný, K. Grove-Rasmussen, K. Flensberg, P. E. Lindelof

*Corresponding author af dette arbejde
102 Citationer (Scopus)

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-π transition in agreement with a simple theoretical model.

OriginalsprogEngelsk
TidsskriftNano Letters
Vol/bind7
Udgave nummer8
Sider (fra-til)2441-2445
Antal sider5
ISSN1530-6984
DOI
StatusUdgivet - 1 aug. 2007

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