Resistive transition of niobium superconducting hot-electron bolometer mixers
作者:
D. Wilms Floet,
J. J. A. Baselmans,
T. M. Klapwijk,
J. R. Gao,
期刊:
Applied Physics Letters
(AIP Available online 1998)
卷期:
Volume 73,
issue 19
页码: 2826-2828
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.122603
出版商: AIP
数据来源: AIP
摘要:
We present a model for the description of the resistive transition in hot-electron bolometer mixers. We show that the transition is a property of a superconducting microbridge connected to normal conducting cooling pads. Using the concepts of the superconducting proximity effect, charge-imbalance generation, and Andreev reflection, we have calculated the resistance versus temperature of the device and demonstrate its dependence on the length of the microbridge, both theoretically and experimentally. The analysis reopens the question of the relationship between the resistive transition and the situation in which the device is optimally operated as a heterodyne mixer. ©1998 American Institute of Physics.
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