High frequency magnetic oscillations of the organic metal $\theta$-(ET)$_4$ZnBr$_4$(C$_6$H$_4$Cl$_2$) in pulsed magnetic field of up to 81 T

TL;DR

This study investigates de Haas-van Alphen oscillations in an organic metal under pulsed magnetic fields up to 81 T, revealing a Fourier spectrum consistent with a model of coupled orbits and magnetic breakdown.

Contribution

It provides detailed experimental data on magnetic oscillations in a specific organic metal and confirms the applicability of a coupled orbit model at high magnetic fields.

Findings

Fourier spectrum matches the coupled orbit model.

Reliable amplitude measurements up to several kiloteslas.

All observed frequencies are linear combinations of basic and breakdown orbits.

Abstract

De Haas-van Alphen oscillations of the organic metal $\theta$-(ET)$_4$ZnBr$_4$(C$_6$H$_4$Cl$_2$) are studied in pulsed magnetic fields up to 81 T. The long decay time of the pulse allows determining reliable field-dependent amplitudes of Fourier components with frequencies up to several kiloteslas. The Fourier spectrum is in agreement with the model of a linear chain of coupled orbits. In this model, all the observed frequencies are linear combinations of the frequency linked to the basic orbit $\alpha$ and to the magnetic-breakdown orbit $\beta$.