Eur. Phys. J. B (2014) 87: 200
https://doi.org/10.1140/epjb/e2014-50340-9

Regular Article

De Haas-van Alphen oscillations in the compensated organic metal α-‵pseudo-κ′-(ET)₄H₃O[Fe(C₂O₄)₃]·(C₆H₄Br₂)

¹ Laboratoire National des Champs Magnétiques Intenses (UPR 3228 CNRS, INSA, UJF, UPS), 143 avenue de Rangueil, 31400 Toulouse, France
² Institut Jean Lamour, Département de Physique de la Matière et des Matériaux, CNRS-UMR 7198, 54506 Vandoeuvre-les-Nancy, France
³ Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
⁴ Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, Spain
⁵ Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, MD, Russia

^a e-mail: alain.audouard@lncmi.cnrs.fr

Received: 27 May 2014
Received in final form: 30 June 2014
Published online: 9 September 2014

Abstract

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 α-‘pseudo-κ’-(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.