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

TL;DR

This paper models de Haas-van Alphen oscillations in a specific 2D organic metal with a complex Fermi surface, demonstrating good agreement with experimental data up to 55 T.

Contribution

It provides a detailed calculation method for dHvA oscillations considering combined orbit contributions in a compensated 2D metal.

Findings

Calculated Fourier amplitudes match experimental data.

Combination of multiple orbits influences Fourier components.

Good quantitative agreement with high-field measurements.

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 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.