Objective
Organic molecular metals possess unique physical properties in which both low dimensionality and strong quasiparticle interactions play major roles. Recent studies of these materials carried out at Oxford and Moscow have revealed that the carrier effective masses measured using Shubnikov-de Haas and de Haas-van Alphen oscillations are up to a factor 3 to 4 larger than those derived from cyclotron resonance experiments. This large difference is due to strong Fermi-liquid effects and has so far not been observed in other systems. Consequently, the organic molecular metals can be considered as unique model systems in which experimental studies of mass renormalisation are possible. In spite of the large size of the effect, the exact mechanism is still unclear, as various types of electron-electron and electron-phonon interaction may be involved.
The aim of this project is to determine the mass renormalisation mechanism in organic metals both experimentally and theoretically. The experimental research will involve the unique facilities at Moscow (General Physics Institute), Oxford and Leuven, which include very low temperatures, strong and ultrastrong magnetic fields and powerful far-infrared and microwave sources. At the same time, theoreticians at the Lebedev and Landau Institutes will apply Landau Fermi-liquid theory to low-dimensional systems including the organic molecular superconductors and metals. Theoretical studies will involve calculations of the magnetoelectrical properties, quantum oscillatory phenomena (Shubnikov-de Haas and de Haas-van Alphen effects) and cyclotron resonance of strongly interacting Fermi liquids in quantising magnetic fields.
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OX1 3RH OXFORD
United Kingdom