J. Phys. I France 2 (1992) 89-99
Angular magnetoresistance oscillations and the shape of the Fermi surface in (ET) 2IBr 2M.V. Kartsovnik1, V.N. Laukhin2, S.I. Pesotskii2, I.F. Schegolev1 and V.M. Yakovenko3
1 Institute of Solid State Physics, USSR Academy of Sciences, Chernogolovka, MD, 142432, U.S.S.R.
2 Chernogolovka Institute of Chemical Physics, USSR Academy of Sciences, Chernogolovka, MD, 142432, U.S.S.R.
3 L.D. Landau Institute for Theoretical Physics, USSR Academy of Sciences, Kosygin St. 2, Moscow, 117940, U.S.S.R.
(Received 2 September 1991, accepted 1 October 1991)
Angular magnetoresistance oscillations have been studied systematically for -(ET) 2 IBr 2 in the magnetic field rotating in a series of planes perpendicular to the conducting (a, b)-plane. The oscillations have been found in all studied planes. The shape of the Fermi surface transverse cross-section has been reconstructed using the obtained data. Angular dependence of the slow Shubnikov-de Haas oscillations frequency and some fine features of angular magnetoresistance oscillations permit to discuss also the structure of the Fermi surface longitudinal cross-section. The Fermi surface consists most likely of main cylinders with inclined warping planes and small pockets or necks between them.
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