Europhys. Lett.
Volume 47, Number 1, July 1999
Page(s) 70 - 76
Section Condensed matter: electronic structure, electrical, magnetic and optical properties
Published online 01 December 2003
DOI: 10.1209/epl/i1999-00353-8

Europhys. Lett, 47 (1), pp. 70-76 (1999)

Indications for electron localization effects in the strongly 2D organic metal $\kappa$-$\rm (BEDT\hbox{-}TTF)_2 I_3$ as observed by Shubnikov-de Haas experiments

E. Balthes 1, M. Schiller 2 D. Schweitzer 2, I. Heinen 3, W. Strunz 3
E. Steep 1, A. G. M. Jansen 1 and P. Wyder 1

1 Grenoble High Magnetic Field Laboratory, MPI - FKF and CNRS
BP 166, F-38042 Grenoble Cedex 9, France
2 3. Physikalisches Institut der Universität Stuttgart
Pfaffenwaldring 57, 70550 Stuttgart, Germany
3 Anorganisch-Chemisches Institut der Universität Heidelberg
Im Neuenheimer Feld 270, 69120 Heidelberg, Germany

(received 26 February 1999; accepted 29 April 1999)

PACS. 71.18${\rm +y}$ - Fermi surface: calculations and measurements; effective mass, g factor.
PACS. 72.20My - Galvanomagnetic and other magnetotransport effects.
PACS. 74.70 Kn - Organic superconductors.


In the strongly two-dimensional (2D) organic metal $\kappa$-$\rm (BEDT\hbox{-}TTF)_2 I_3$ anomalous damping effects of the magneto-quantum oscillations are reported for the special conditions $\Theta=0^{\circ}$ (i.e., $B\perp$ to the conducting planes), $B \gt 12\;{\rm T}$ and $T < 1\;{\rm K}$. A new observed oscillation frequency $F_{0} = 13.2\;{\rm T}$ is found to control these effects at low Landau level filling factors $\nu$ of F0. This is of special interest since the damping effects are attributed to a localization of electrons which may occur in 2D systems especially at low $\nu$.


Copyright EDP Sciences