| EPSRC Reference: |
GR/K76740/01 |
| Title: |
STUDIES OF THE MAGNETICALLY-INDUCED INSULATING PHASE OF 2D HOLE SYSTEMS BY RF ABSORPTION |
| Principal Investigator: |
Mellor, Dr CJ |
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| Department: |
Sch of Physics & Astronomy |
| Organisation: |
University of Nottingham |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
23 October 1995 |
Ends: |
22 April 1997 |
Value (£): |
10,418
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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Summary on Grant Application Form |
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The collaborative experiment proposed will investigate the magnetically-induced insulating phase of high mobility 2DHSs by rf absorption at frequencies as high as 10GHz. This will enable the first measurement of the shear modulus of the solid phase and the mapping of the melting transition as a function of magnetic field and temperature. The shear modulus is an important parameter that can be theoretically predicted. The variation of the shear modulus as the solid melts will help to determine the mechanism by which the solid melts. The swept frequency meander line technique allows us to measure multiple absorptions at known wavevectors and frequencies enabling us to determine the dispersion curve of the magneto-phonons of the solid.Preliminary experiments have shown that the solid phase forms close to a filling factor of 1/3 at low temperatures. At a filling factor of 1/5 the rf absorption indicates that the state has unique properties that have not been observed before in studies on 2DESs.The frequency dependence of the rf absorption by fractional quantum Hall (FQH) states will also be studied. This will yield important information about the finite frequency properties of the FQH states in a 2DHS.
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Key Findings |
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Potential use in non-academic contexts |
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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.nottingham.ac.uk |