De Haas-van Alphen oscillations in the compensated organic metal alpha-'pseudo-kappa'-(ET)4H3O[Fe(C2O4)3].(C6H4Br2)

Alain Audouard (1) , Enric Canadell (2) , Jean-Yves Fortin (3) , Tatyana G. Prokhorova (4) , Vladimir N. Laukhin (2, 5) , David Vignolles (1) , Eduard Yagubskii (4)

1 LNCMI-T - Laboratoire national des champs magnétiques intenses - Toulouse
2 ICMAB - Institut de Ciència de Materials de Barcelona
3 IJL - Institut Jean Lamour
4 IPCP - Institute of Problems of Chemical Physics
5 ICREA - Institució Catalana de Recerca i Estudis Avançats = Catalan Institution for Research and Advanced Studies

Field-, temperature- and angle-dependent Fourier amplitude of de Haas-van Alphen (dHvA) oscillations are calculated for compensated two-dimensional (2D) metals with textbook Fermi surface (FS) composed of one hole and two electron orbits connected by magnetic breakdown. It is demonstrated that, taking into account the opposite sign of electron and hole orbits, a given Fourier component involves combination of several orbits, the contribution of which must be included in the calculations. Such FS is observed in the strongly 2D organic metal alpha-'pseudo-kappa'-(ET)4H3O[Fe(C2O4)3].(C6H4Br2), dHvA oscillations of which have been studied up to 55 T for various directions of the magnetic field with respect to the conducting plane. Calculations are in good quantitative agreement with the data.

Domaines: Electrons fortement corrélés [cond-mat.str-el]

Alain Audouard, Enric Canadell, Jean-Yves Fortin, Tatyana G. Prokhorova, Vladimir N. Laukhin, et al.. De Haas-van Alphen oscillations in the compensated organic metal alpha-'pseudo-kappa'-(ET)4H3O[Fe(C2O4)3].(C6H4Br2). 2014. ⟨hal-01052749v2⟩