J. Phys. I France 6 (1996) 1809-1818
Shubnikov-de Haas Oscillations in New Organic Conductors (ET) [ Hg Cl (C H Cl) ] and (ET) [ Hg Cl (C H Br) ]R.B. Lyubovskii1, 2, S.I. Pesotskii1, 2, A. Gilevski2 and R.N. Lyubovskaya1
1 Institute of Chemical Physics at Chernogolovka RAS, Chernogolovka. Moscow region, 142432 Russia
2 International Laboratory of High Magnetic Fields and Low Temperatures, 53-529 Wroclaw, Poland
(Received 5 April 1996, accepted 11 June 1996)
The results of the investigations of Shubnikov-de Haas oscillations in the quasi-two-dimensional organic complexes (ET) 8[ Hg 4Cl 12(C 6H 5Cl) 2] , where X = CI, Br in the magnetic fields up to 40 T were reported. These results allow one to obtain some information about Fermi surface in the mentioned complexes. Shubnikov-de Haas oscillations in the compound with X = Cl correspond at least to two different cylindrical sheets of Fermi surface with the cross-section in (bc)-plane of 13% and 20% Brillouin zone cross-section. Shubnikov-de Haas oscillations in the complex with X = Br correspond to one cylindrical sheet with the cross-section in (bc)-plane of 13% of Brillouin zone cross-section. The experimental results for the complex with X = Br more agree with the theoretical calculations of Fermi surface than for the complex with X = Cl.
© Les Editions de Physique 1996