Fig. 2: Optimal temperature range for detecting topological frequency shift.
From: Temperature dependence of quantum oscillations from non-parabolic dispersions
The upper square panel displays the temperature dependence of the quantum-oscillation amplitude (ΔA = A(T) − A0) and topological frequency shift ΔFtop(T). The temperature axis is scaled by the ratio of cyclotron to free-electron mass, and F0 and A0 stand for the frequency and amplitude at zero temperature, respectively. −ΔFtop/F0 steeply increases just before the oscillation amplitude vanishes; this corresponds to the temperature regime where thermal broadening is comparable to the cyclotron energy (εc ≈ 2π2kBT), as illustrated by the filled density-of-states (DOS) plot for various temperatures (at the very top of figure). The lower square panel plots the temperature dependence of −(ΔFtop/F0)⋅(A/A0); its peak identifies the optimal temperature to observe the topological frequency shift; our scaling of the temperature axis implies the optimal temperature is inversely proportional to the cyclotron mass.
