Fig. 2: Doping and temperature evolution of the nonlinear THz responses.
From: Distinct terahertz nonlinear and Raman responses in cuprate superconductors Bi2Sr2CaCu2O8+x
a and b Fitting for the THz pump-induced reflectivity change of the OP90 sample at 10 K using Eq. (1) for a the A1g and b B1g components. In a, the black dashed curve denotes the fitting curve. The THz Kerr, decaying, and offset components correspond to the three terms in Eq. (1). c and d The amplitude of the THz Kerr and decaying components as a function of the hole concentration p for c the A1g and d B1g components. e and f Temperature dependence of the A1g and B1g THz Kerr signals for e OP90 and f OD82.
