| EPSRC Reference: |
GR/J35146/01 |
| Title: |
NOISE PROBING OF THE ENERGY BAND STRUCTURE OF QUANTUM MECHANICAL WEAK LINK CIRCUITS |
| Principal Investigator: |
Clark, Professor T |
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| Department: |
Physics and Astronomy |
| Organisation: |
University of Sussex |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
13 August 1993 |
Ends: |
12 August 1996 |
Value (£): |
231,868
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Summary on Grant Application Form |
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This programme is concerned with the behaviour of superconducting weak link circuits in the limiting regimes corresponding to their fully quantum mechanical description. These are the Charge and Flux Mode regimes, where the charge or flux variables, respectively, are relatively well defined. For investigations 4K both involve the use of ultra small capacitance weak links, but in different circuit configurations. For the Charge Mode the quantum description yields energy bands periodic in the total electric displacement flux while the conjugate Flux Mode bands (SQUID ring configuration) are periodic in external magnetic flux. We have developed powerful experimental techniques to probe these bands via the electric or magnetic susceptibility of the appropriate weak link circuit. We propose to build on these techniques to investigate Charge and Flux Mode effects in the range 0.3KT10K, using both point contact and planar weak link circuits. Our programme is designed to promote deeper understanding of energy band structure in both modes and will complement work elsewhere on phenomena arising from the existence of these bands, eg Coulomb blockade (Critical Voltage law) and Bloch oscillations (Current bias frequency). The susceptibility methods will also be used as general tools to probe the behaviour of single quantum objects.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.sussex.ac.uk |