Volume 35, Number 1, July I 1996
|Page(s)||37 - 42|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
de Haas-van Alphen investigations of the organic metal α-(ET)2TlHg(SeCN)4
Physikalisches Institut, Universität Karlsruhe -
D-76128 Karlsruhe, Germany
2 Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung, Centre National de la Recherche Scientifique - B. P. 166, F-38042 Grenoble, France
3 Institute of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia
Accepted: 10 May 1996
We report on the first de Haas-van Alphen (dHvA) studies of the quasi–two-dimensional (2D) organic metal α-(ET)2TlHg(SeCN)4. The angular dependence of the dHvA frequency and of the effective cyclotron mass, mc, follows perfectly the expected 2D 1/cos behaviour. The angular dependence of the absolute amplitude of the dHvA oscillations is in quantitative agreement with the Lifshitz-Kosevich behaviour. Three distinct spin-splitting zeros can be observed. The extracted value of is in accordance with a reduced electron-phonon coupling constant in this non-superconducting material. Contrary to previous Shubnikov-de Haas results no field dependence of mc up to 29 T is observed.
PACS: 71.18.+y – Fermi suface: calculations and measurements; effective mass, g factor / 74.70.Kn – Organic superconductors
© EDP Sciences, 1996
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