Normal metal tunnel junction-based superconducting quantum interference proximity transistor

Sophie D'Ambrosio; Martin Meissner; Christophe Blanc; Alberto Ronzani; Francesco Giazotto

doi:10.1063/1.4930934

Normal metal tunnel junction-based superconducting quantum interference proximity transistor

Sophie D'Ambrosio^*
, Martin Meissner
, Christophe Blanc
, Alberto Ronzani
, Francesco Giazotto^*

^*Corresponding author for this work

Not published at VTT

Scuola Normale Superiore di Pisa

Research output: Contribution to journal › Article › Scientific › peer-review

24 Citations (Scopus)

Abstract

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 language	English
Article number	113110
Journal	Applied Physics Letters
Volume	107
Issue number	11
DOIs	https://doi.org/10.1063/1.4930934
Publication status	Published - 14 Sept 2015
MoE publication type	A1 Journal article-refereed

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AU - D'Ambrosio, Sophie

AU - Meissner, Martin

AU - Blanc, Christophe

AU - Ronzani, Alberto

AU - Giazotto, Francesco

PY - 2015/9/14

Y1 - 2015/9/14

N2 - 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.

AB - 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.

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Normal metal tunnel junction-based superconducting quantum interference proximity transistor

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