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Details of Grant 

EPSRC Reference: GR/M99880/01
Title: NANOSCALE JOSEPHSON JUNCTIONS AND ASYMMETRY MODULATED SQUIDS
Principal Investigator: Blamire, Professor M
Other Investigators:
Barber, Professor Z Tarte, Dr EJ
Researcher Co-Investigators:
Project Partners:
Department: Materials Science & Metallurgy
Organisation: University of Cambridge
Scheme: Standard Research (Pre-FEC)
Starts: 05 May 2000 Ends: 04 January 2004 Value (£): 171,083
EPSRC Research Topic Classifications:
Instrumentation Eng. & Dev. Materials Characterisation
EPSRC Industrial Sector Classifications:
No relevance to Underpinning Sectors Electronics
Related Grants:
Panel History:  
Summary on Grant Application Form
Superconductor-Normal metal-Superconductor (SNS) junctions are attractive for applications such as superconducting quantum interference devices (SQUIDS), rapid single flux quantum (RSFQ) logic circuits and rf devices because of their non-hysteretic characteristics and high critical current density. The aim of this programme is to build on the recent progress in the nanofabrication of SNS devices to develop junction technology for studies of the basic physics of coupled SNS devices and for device applications such as RSFQ. We will also fabricate both 1D and 2D lumped arrays of Josephson junctions; various design of these lumped junction arrays will be integrated in a suitable microwave environment and tested for coherent radiation, and ultimately applied in voltage standards and superconducting digital to analogue converters. We will also develop an innovative application of SNS devices in which the circulating current in a SQUIS loop can in principle be directly controlled by varying the asymmetry parameter which represents the difference in the critical current of the two junctions. Using hot electron injection to vary the asymmetry parameter in a SQUIS we aim to demonstrate a direct conversion from electron temperature difference to SQUID output voltage.
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Organisation Website: http://www.cam.ac.uk