TY - JOUR
T1 - Low-frequency noise and discrete charge trapping in small-area tunnel junction dc SQUID's
AU - Wakai, R. T.
AU - Van Harlingen, D. J.
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 1986
Y1 - 1986
N2 - We present measurements of the noise properties of very small-area, high current density tunnel junction dc superconducting quantum interference devices (SQUID's). The low-frequency noise spectra display broad curves and bumps consistent with the presence of individual Lorentzian features superimposed on a background which is always much flatter than 1/f. When these features are most prominent, the voltage across the SQUID exhibits discrete switching behavior which we attribute to the trapping and untrapping of single electrons within the tunneling barrier. This observation, along with other evidence presented, suggests that critical current fluctuations displaying tunneling kinetics dominate the low-frequency noise of these ultrasmall devices.
AB - We present measurements of the noise properties of very small-area, high current density tunnel junction dc superconducting quantum interference devices (SQUID's). The low-frequency noise spectra display broad curves and bumps consistent with the presence of individual Lorentzian features superimposed on a background which is always much flatter than 1/f. When these features are most prominent, the voltage across the SQUID exhibits discrete switching behavior which we attribute to the trapping and untrapping of single electrons within the tunneling barrier. This observation, along with other evidence presented, suggests that critical current fluctuations displaying tunneling kinetics dominate the low-frequency noise of these ultrasmall devices.
UR - http://www.scopus.com/inward/record.url?scp=36549103093&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=36549103093&partnerID=8YFLogxK
U2 - 10.1063/1.97051
DO - 10.1063/1.97051
M3 - Article
AN - SCOPUS:36549103093
SN - 0003-6951
VL - 49
SP - 593
EP - 595
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 10
ER -