J. Phys. I France
Volume 6, Numéro 12, December 1996
Page(s) 1809 - 1818
DOI: 10.1051/jp1:1996189
J. Phys. I France 6 (1996) 1809-1818

Shubnikov-de Haas Oscillations in New Organic Conductors (ET) $\mathsf{_8}$[ Hg $\mathsf{_4}$Cl $\mathsf{_{12}}$(C $\mathsf{_6}$H $\mathsf{_5}$Cl) $\mathsf{_2}$] and (ET) $\mathsf{_8}$[ Hg $\mathsf{_4}$Cl $\mathsf{_{12}}$(C $\mathsf{_6}$H $\mathsf{_5}$Br) $\mathsf{_2}$]

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

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