Design and Operation of Stable rf‐Biased Superconducting Point‐Contact Quantum Devices, and a Note on the Properties of Perfectly Clean Metal Contacts
作者:
J. E. Zimmerman,
Paul Thiene,
J. T. Harding,
期刊:
Journal of Applied Physics
(AIP Available online 1970)
卷期:
Volume 41,
issue 4
页码: 1572-1580
ISSN:0021-8979
年代: 1970
DOI:10.1063/1.1659074
出版商: AIP
数据来源: AIP
摘要:
Point‐contact devices are described which have exhibited long‐term stability and reliability. A particular mode of operation of the devices as rf‐biased low‐frequency detectors is described in detail, including a description of how the device drives a resonant circuit to which it is coupled. In this mode of operation the sensitivity of the devices to low‐frequency fields is of the order of 10−9G per root cycle bandwidth. Perfectly clean contacts were made by breaking a notched niobium member at 4.2°K and then remaking contact at the break. Quantum behavior of such contacts is identical to that of ordinary contacts, but effects of microscopic multiple connections at the contact were not observed.
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