Aumentado, J.
, Keller, M.
, Martinis, J.
and Devoret, M.
(2004),
Nonequilibrium Quasiparticles and Periodicity in Single-Cooper-Pair Transistors, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31329
(Accessed October 10, 2025)
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Nonequilibrium Quasiparticles and Periodicity in Single-Cooper-Pair Transistors
Published
Author(s)
, , , Michel H. Devoret
Abstract
We have made single-Cooper-pair transistors in which we control the spatial profile of the superconducting gap energy by oxygen doping. The profile dramatically affects the switching current vs. gate voltage curve of the transistor, changing its period from 1e to 2e. We observe a 2e period despite "poisoning" by nonequilibrium quasiparticles, a surprising result that is due to the interplay between intrinsic device timescales and measurement bandwidth.Citation
Physical Review Letters
Volume
92
Issue
6
Pub Type
Journals
Download Paper
Keywords
Josephson effect, quasiparticle poisoning, single electron transistors, superconductivity
Citation
Issues
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Created February 12, 2004, Updated October 12, 2021