Normal metal tunnel junction-based superconducting quantum interference proximity transistor

Sophie D'Ambrosio (Corresponding Author), Martin Meissner, Christophe Blanc, Alberto Ronzani, Francesco Giazotto (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)


We report the fabrication and characterization of an alternative design for a superconducting quantum interference proximity transistor (SQUIPT) based on a normal metal (N) probe. The absence of direct Josephson coupling between the proximized metal nanowire and the N probe allows us to observe the full modulation of the wire density of states around zero voltage and current via the application of an external magnetic field. This results into a drastic suppression of power dissipation which can be as low as a few ∼10-17 W. In this context, the interferometer allows an improvement of up to four orders of magnitude with respect to earlier SQUIPT designs and makes it ideal for extra-low power cryogenic applications. In addition, the N-SQUIPT has been recently predicted to be the enabling candidate for the implementation of coherent caloritronic devices based on proximity effect.

Original languageEnglish
Article number113110
JournalApplied Physics Letters
Issue number11
Publication statusPublished - 14 Sept 2015
MoE publication typeA1 Journal article-refereed


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