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Using high speed scanning tunneling spectroscopy, we perform a full mappingof the quasiparticle density of states (DOS) in single crystals ofBiPbSrCaCuO(2212). The measurements carried out at 5 K showed a complex spatialpattern of important variations of the local DOS on the nanometer scale.Superconducting areas are co-existing with regions of a smooth and largergap-like DOS structure. The superconducting regions are found to have a minimumsize of about 3 nm. The role of Pb-introduced substitutional disorder in theobserved spatial variations of the local DOS is discussed.Comment: 4 page Letter with 3 figures (2 color figures

Nanometer scale mapping of the density of states in an inhomogeneous superconductor