| EPSRC Reference: |
GR/N35038/01 |
| Title: |
QUANTUM MAGNETISM AND NOVEL PHASE TRANSITIONS |
| Principal Investigator: |
Cowley, Professor R |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Oxford Physics |
| Organisation: |
University of Oxford |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
26 January 2001 |
Ends: |
25 January 2004 |
Value (£): |
158,732
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| EPSRC Research Topic Classifications: |
| Magnetism/Magnetic Phenomena |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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Support for experimental studies of quantum magnetism and novel phase transitions to be made with netron scattering & magnetization techniques is sought. Experiments will be performed to study the evolution of excitations in KcuF3 from the unbound spinons to longitudinal & transverse modes at the onset of 3-d order. Frustration in quantum systems will be studies by applying a magnetic field to Cs2CuC14 and Cs2CoC14 & observing the resulting incommensurate structure. The dimer materialTlCuC13 will be studied in a magnetic field to observe the possible bose condensation when the triplet dimer excitations become unstable. The spin 1/2 Ising model in a transverse field is the simplest nontrivial system that undergoes a quantum critical phase transition. As yet there are no detailed experimental measurements but studies of CoNb206 would enable theories of universality to be tested. A spin 1 system CsNiC13 will be studies so that the temperature dependence of the excitations can be compared with recent experiments. Ca doped SrTiO3 is a possible example of a 3-d quantum phase transition & will be studies with x-ray scattering techniques , and finally we plan to study the 2-length scale phenomena by using epitaxially thin films & varying the clamping of the surface.
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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.ox.ac.uk |