Pii: S0022-3697(00)00119-0

We have performed a systematic doping-dependent angle-resolved photoemission spectroscopy (ARPES) of Pb-substituted Bi2201 (Bi1.80Pb0.38Sr2.01CuO62d) with high energy (7±11 meV) and momentum (0.01 AÊ ) resolutions. We found that all the samples show a large hole-like Fermi surface centered at (p,p), whose volume changes systematically as a function of doping. The superconducting gap exhibits a dx2 y2 -like anisotropy with a typical gap value of 10±15 meV near (p,0). By comparing with Bi2Sr2CaCu2O8 (Bi2212), we found that the size of superconducting gap is well scaled with the maximum Tc …T c †: Doping-dependence of spectral line shape at (p,0) is very similar between Bi2201 and Bi2212, while its energy scale is different by a factor of 4, corresponding to the ratio of T c between the two compounds. These indicate that the superconducting and pseudogap properties are characterized by T c irrespective of the number of CuO2 layers or the BiO superstructure. q 2000 Elsevier Science Ltd. All rights reserved.