| EPSRC Reference: |
GR/R46489/01 |
| Title: |
Vortex Matter in 1(+1) Dimensions |
| Principal Investigator: |
Bending, Professor SJ |
| Other Investigators: |
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| Department: |
Physics |
| Organisation: |
University of Bath |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 September 2002 |
Ends: |
31 August 2004 |
Value (£): |
123,870
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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Summary on Grant Application Form |
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We have recently used high resolution Hall probe microscopy to verify that tilted flux lines in the highly anisotropic BSCCO superconductor are unstable with respect to the formation of perpendicular Josephson vortex (JV) and pancake vortex (PV) lattices (crossing lattices). At very high lift angles the mutual attraction between these two objects leads to a new 1 D state of vortex matter whereby all PV stacks condense out onto chains due to the vertical stacks of JVs located there. These chains represent an exciting new model system for studying the physics of 1 D repulsive Bosons. We plan to map out the properties and the phase diagram of this 1(+1)D vortex matter as a function of applied field, temperature and tilt angle. A unique property of the chains is that they display re-entrant melting as the c-axis field component (or temperature) is reduced. This will be investigated in deta and a microscopic physical picture developed in collaboration with theoreticians. We have also shown that the movement of JVs can be used to reversibly manipulate PVs trapped on them (vortex 'pump'). This unique property will be used to reversibly control PV densities by tuning an inhomogeneous in-plane field, allowing the strength of the PVIJV interaction to be measured at different points in the phase diagram. Novel schemes c flux amplification and/or vortex logic based on this effect will also be explored. Finally the 'decoration' of JVs by PVs will be used to explore the dynami properties of the JV lattice itself. By imaging in the presence of a periodically rotating in-plane field we will probe the resonant behaviour and damping of the JV lattice. Transport measurements will also be used to probe novel dynamic phases.
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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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| Date Materialised |
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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.bath.ac.uk |