DOI: 10.1103/physrevb.73.092514
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Abstract: The tunneling spectra of high-temperature superconductors on Bi 2 Sr 2 CaCu 2 O 8+␦ ͑Bi-2212͒ reproducibly show a high-bias structure in the form of a dip-hump at voltages higher than the gap voltage. Of central concern is whether this feature originates from the normal state background or is intrinsic to the superconducting mechanism. We address this issue by generating a set of model conductance curves-a "normal state" conductance that takes into account effects such as the band structure and a possible pse…

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