Fig. 4

Doping dependence of H _CDW and T _CDW. a H dependence of δf at T = 4.2 K. From fitting (solid curves) the data to a mean field model, δf ∝ (H−H _CDW)^0.5, the threshold field for H-induced CDW, H _CDW = 10.4, 11.0, and 11.8 T for p = 0.114, 0.128, and 0.135, respectively, was determined. b Temperature dependence of δf for the three samples, from which the CDW onset temperature T _CDW = 60, 50, and 35 K for p = 0.114, 0.128, and 0.135, respectively, was determined. The curves are fits to a mean field model, δf ∝ (T _CDW−T)^0.5. The dotted horizontal lines are guides to the eyes. Error bars represent the uncertainty in estimating δf