TITLE

Thermally excited tunneling from a metastable electronic state in a single-Cooper-pair transistor

AUTHOR(S)
Rees, D. G.; Glasson, P.; Simkins, L. R.; Collin, E.; Antonov, V.; Frayne, P. G.; Meeson, P. J.; Lea, M. J.
PUB. DATE
October 2008
SOURCE
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p173508
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Metastable electron traps and two-level systems (TLSs) are common in solid-state devices and lead to background charge movement and charge noise in single-electron and single-Cooper-pair transistors. We present measurements of the real-time capture and escape of individual electrons in metastable trapped states at very low temperatures, leading to charge offsets close to 1e. The charge movement exhibits thermal excitation to a hysteretic tunneling transition. The temperature dependence and hysteresis can be explained by the coupling of a TLS to a quasiparticle trap.
ACCESSION #
35279030

 

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