Normal metal tunnel junction-based superconducting quantum interference proximity transistor

Journal Article · Mon Sep 14 04:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4930934· OSTI ID:22482098

D'Ambrosio, Sophie; Meissner, Martin; Blanc, Christophe; Ronzani, Alberto; Giazotto, Francesco ^[1]

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1. NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56127 Pisa (Italy)

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{sup −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.

• OSTI ID: 22482098
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 11 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DENSITY OF STATES
DESIGN
ELECTRIC POTENTIAL
FABRICATION
IMPLEMENTATION
INTERFERENCE
INTERFEROMETERS
MAGNETIC FIELDS
METALS
MODULATION
PROXIMITY EFFECT
TRANSISTORS
TUNNEL EFFECT