Quantum capacitance and charge sensing of a superconducting double dot

Nicholas J. Lambert, Adam A. Esmail, Megan Edwards, Felix A. Pollock, Brendon William Lovett, Andrew Ferguson

Research output: Contribution to journalLetterpeer-review

5 Citations (Scopus)

Abstract

We study the energetics of a superconducting double dot, by measuring both the quantum capacitance of the device and the response of a nearby charge sensor. We observe different behaviour for odd and even charge states and describe this with a model based on the competition between the charging energy and the superconducting gap. We also find that, at finite temperatures, thermodynamic considerations have a significant effect on the charge stability diagram.
Original languageEnglish
Article number112603
Number of pages4
JournalApplied Physics Letters
Volume109
Issue number11
Early online date15 Sept 2016
DOIs
Publication statusPublished - Sept 2016

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