Fig. 2: Lifshitz-Kosevich fits.

Field dependence of the TDO frequency in Hg1223 (p = 8%) at different temperatures (symbols). Solid lines correspond to the fits to the data using the Lifshitz-Kosevich theory plus a polynomial background in the field range 40 ≤ H ≤ 83 T and in the temperature range T = 1.4–4.2 K (see Supplementary Note 3 for details). The inset shows the Fourier analysis of the oscillatory part of the data at T = 1.4 K along with the contribution of F1 (blue), F2 (grey) and F3 (red), respectively. The green component corresponds to a frequency combination, which has been taken into account to improve the fits.