NMR EVIDENCE FOR A D-WAVE NORMAL-STATE PSEUDOGAP

NMR data from high-T-c superconducting cuprates having widely differen t T-c,T-max values and different hole concentrations, p, are shown to implicate a d-wave-like pseudogap. The deduced pseudogap energies agre e well with the gap in the charge excitations determined from photoemi ssion measurements, and the gap energies scale with T-c,T-max. The pse udogap and superconducting gap thus have the same energy scale and for different cuprates have a universal p dependence.