Extended Data Fig. 7: Quantum oscillations in Ca(Rh0.98Ru0.02)2.
From: Three-dimensional flat bands in pyrochlore metal CaNi2
(a) Observed and calculated quantum oscillation frequencies of CaRh2 as a function of field-angle away from [111], with the geometry as defined in panel (d). (b) Polynomial-subtracted magnetic torque data as a function of field taken at base temperature of the He-3 cryostat, (c) corresponding fast Fourier transform amplitudes (dashed lines are guides to the eye labelled with the orbits identified from calculations). (d) Orientation of θ relative to the crystallographic high symmetry directions, corresponding to the “binary” rotation direction. (e) Temperature dependent oscillation data taken at θ = 176° corresponding to the [111] direction. (f) Corresponding temperature-dependent Fourier transform amplitudes. (g) Temperature dependence of the Fourier transform amplitudes. Solid lines are fittings to the Lifshitz-Kosevich formula where all 0 K values have been normalized to unity from which corresponding experimental effective mass parameters have been extracted.
