Figure 3: Dependence of resonance peak frequency on filling factor.
From: Microwave spectroscopic observation of distinct electron solid phases in wide quantum wells
fpk versus partial Landau level filling v* for the 54-nm (a) and 65-nm (b) wells at various carrier densities (n) as marked. Arrows mark 
*, the v* of the local maxima in fpk. Data points without an attached error bar have estimated error, see Fig. 2 for error discussion, in fpk that is smaller than ±5%.
