Indications for electron localization effects in the strongly 2D organic metal κ- as observed by Shubnikov-de Haas experiments

E. Balthes; M. Schiller; D. Schweitzer; I. Heinen; W. Strunz; E. Steep; A. G. M. Jansen; P. Wyder

doi:10.1209/epl/i1999-00353-8

All issues

Volume 47 / No 1 (July 1999)

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

Abstract

Issue		Europhys. Lett. Volume 47, Number 1, July 1999


Page(s)		70 - 76
Section		Condensed matter: electronic structure, electrical, magnetic and optical properties
DOI		https://doi.org/10.1209/epl/i1999-00353-8
Published online		01 December 2003

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

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

E. Balthes¹, M. Schiller², D. Schweitzer², I. Heinen³, W. Strunz³, E. Steep¹, A. G. M. Jansen¹ and P. Wyder¹

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

Abstract

In the strongly two-dimensional (2D) organic metal κ- $\rm (BEDT\hbox{-}TTF)_2I_3$ 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), $B > 12\;{\rm T}$ 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 ν 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 ν.

PACS: 71.18.+y – Fermi surface: calculations and measurements; effective mass, g factor / 72.20.My – Galvanomagnetic and other magnetotransport effects / 74.70.Kn – Organic superconductors

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