Abstract
Quasiparticle tunneling spectroscopic studies of electron- (n-type) and hole-doped (p-type) cuprates reveal that the pairing symmetry, pseudogap phenomenon and spatial homogeneity of the superconducting order parameter are all non-universal. We compare our studies of p-type YBa 2Cu 3O 7− δ and n-type infinite-layer Sr 0.9Ln 0.1CuO 2 (Ln=La, Gd) systems with results from p-type Bi 2Sr 2CaCu 2O x and n-type one-layer Nd 1.85Ce 0.15CuO 4 cuprates, and attribute various non-universal behavior to different competing orders in p-type and n-type cuprates.
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