Abstract
Abstract The main purpose of the paper is to present a brief summary of tunneling spectroscopy measurements performed in hole-doped cuprates and a brief description of the mechanism of high- T c superconductivity based on the measurements. In cuprates, tunneling spectroscopy measurements show the presence of two superconducting energy gaps, Δ p and Δ c , and a normal-state pseudogap (a charge gap) Δ cg (0)≃3 Δ p (0). On heating, Δ c and Δ p disappear at and above T c , respectively. An anomaly found in I ( V ) characteristics indicates that the Cooper pairs in cuprates are soliton-like excitations.
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