Does Fourier analysis yield reliable amplitudes of quantum oscillations?
Laboratoire National des Champs Magnétiques Intenses, UPR 3228 CNRS, INSA, UGA, UPS, 143 avenue de Rangueil,
2 Laboratoire de Physique et Chimie Théoriques, CNRS UMR7019, Université de Lorraine, Vandoeuvre-lès-Nancy 54506, France
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Received in final form: 6 July 2018
Accepted: 17 July 2018
Published online: 6 November 2018
Quantum oscillation amplitudes of multiband metals, such as high-Tc superconductors in the normal state, heavy fermions or organic conductors, are generally determined through Fourier analysis of the data even though the oscillatory part of the signal is field dependent. It is demonstrated that the amplitude of a given Fourier component can strongly depend on both the nature of the windowing (either flat, Hahn or Blackman window) and, since oscillations are obtained within a finite field range, the window width. Consequences on the determination of the Fourier amplitudes, hence of the effective masses, are examined in order to determine the conditions for reliable data analysis.
© A. Audouard and J.-Y. Fortin, published by EDP Sciences, 2018
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