J. Phys. IV France
Volume 114, April 2004
Page(s) 351 - 353

J. Phys. IV France
114 (2004) 351
DOI: 10.1051/jp4:2004114080

SdH experiments on the organic superconductor $\kappa $-(BEDT-TTF) 2I3 under hydrostatic pressure

A. Nothardt1, 1, E. Balthes1, W. Schmidt1, D. Schweitzer1, M.V. Kartsovnik2 and I. Sheikin3

1  3. Physikalisches Institut der Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
2  Walther-Meissner-Institut, Walther-Meissner-Strasse 8, 85748 Garchingen, Germany
3  Grenoble High Magnetic Field Laboratory, MPI-FKF and CNRS, BP. 166, 38042 Grenoble Cedex 9, France

Measurements of magneto-transport on the organic superconductor $\kappa $-(BEDT-TTF) 2I 3 in magnetic fields up to 23 T at 0.48 K under hydrostatic pressures up to 9 kbar are reported. In this pronounced two-dimensional (2D) electronic system strong anomalous damping effects of Shubnikov-de Haas (SdH) oscillations are observed under very specific experimental conditions. This hints to the presence of strong electron correlations, which may occur in 2D systems. SdH high pressure experiments are reported, which show, that even 9 kbar cannot suppress the above mentioned effects in $\kappa $-(BEDT-TTF) 2I 3. Key words. Organic superconductors, Fermi surfaces, Magneto-quantum oscillations, Hydrostatic pressure.

© EDP Sciences 2004