Figure 3: Energy-resolved spectra and differential fit in the normal and pseudogap phases. | Nature Communications

Figure 3: Energy-resolved spectra and differential fit in the normal and pseudogap phases.

From: Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates

Figure 3

(a–c) The maximum δR/R(ω,t)=Rneq(ω,t)/Req(ω,t)−1 (Rneq(ω,t) and Req(ω,t) being the non-equilibrium (pumped) and equilibrium (unpumped) reflectivities), measured in the normal (T=300 K, yellow dots) and pseudogap (T=100 K, green dots) phases, is reported for different doping regimes (underdoped (UD83), Tc=83 K; optimally doped (OP96), Tc=96 K; overdoped (OD86), Tc=86 K). The solid lines are the differential fit to the data. The δR/R(ω,t) related to the effective temperature increase is shown in the Supplementary Figure S2. In both the normal and the pseudogap phases, the maximum of the fast reflectivity variation is measured at t=200 fs, that is, directly after all the energy of the 140 fs pump pulses has been delivered to the system.

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