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1 2004

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Electron-electron correlations in (BEDT-TTF)2I3 organic superconductors

Balthes E., Nothardt A., Wyder P., Schweitzer D.

Materials Science Poland

2004

Vol. 22, No. 4

285--298

The detection of the fractional Landau level filling factor a?= 1/2 and low integer filling factors in the two-dimensional multilayer organic metal a-(BED-TTF)2I3 is presented, which shows the occurrence of electron localisation and electron-electron correlation in this bulk metallic two-dimensional system. These effects are found in the normal conducting state of the organic superconductor a-(BEDT-TTF)2I3. In addition, quantum oscillation measurements are found to be a very promising tool for direct detection of the chemical potential and its variation with magnetic field, even under rather complex fermiological conditions.