EPSRC Reference: |
GR/R64186/01 |
Title: |
MHz and GHz Studies of Novel Groundstates in organic metals. |
Principal Investigator: |
Ardavan, Professor A |
Other Investigators: |
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Researcher Co-Investigators: |
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Project Partners: |
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Department: |
Oxford Physics |
Organisation: |
University of Oxford |
Scheme: |
Standard Research (Pre-FEC) |
Starts: |
01 November 2001 |
Ends: |
30 April 2005 |
Value (£): |
324,193
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EPSRC Research Topic Classifications: |
Condensed Matter Physics |
Materials Characterisation |
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EPSRC Industrial Sector Classifications: |
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Related Grants: |
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Panel History: |
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Summary on Grant Application Form |
Crystalline organic molecular metals form a very interesting system in which to study the effect of electron correlations. Although organic metals share many of the features of cuprate superconductors (quasi-two-dimensional bandstructure, proximity to antiferromagnetism, d-wave superconductivity etc.) and heavy-fermion systems (corrrelations, heavily renormalised effective masses), their bandstructure is inherently simple and may be readily measured. The interaction energy scales are such that laboratory magnetic fields (45 T steady, 100 T pulsed) can potentially access many exotic groundstates, including, as we have recently shown, phases such as the Fulde-Ferrell-Larkin-Ovchinnikov state and Frohlich superconductivity. We propose the implementation of improved MHz and GHz techniques which will allow (i) the sensitive detection of the phase boundaries between groundstates; (ii) the measurement of the evolution of phenomena such as cyclotron resonance and Fermi-surface traversal resonances with frequency; (iii) the study of phase-coherence effects and (iv) quantitative deductions of the intdayer conductivity. These will be compared with complementary measurements of the bandstructure using e.g. de Haas-van Alphen and angle-dependent magnetoresistance oscillations. The scientific aim of the project is to understand the prerequisites for the various low-temperature groundstates by studying their evolution (and that of the interactions that produce them) with magnetic field, temperature, underlying (normal-state) bandstructure, effective dimensionality and disorder.
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Key Findings |
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Potential use in non-academic contexts |
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Impacts |
Description |
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Summary |
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Date Materialised |
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Sectors submitted by the Researcher |
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Project URL: |
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Further Information: |
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Organisation Website: |
http://www.ox.ac.uk |