Modeling of Tunneling Spectroscopy in High-Tc Superconductors

Details Modeling of Tunneling Spectroscopy in High-Tc Superconductors Modeling of Tunneling Spectroscopy in High-Tc Superconductors

1997-09-23

arxiv.org/abs/cond-mat/9709249v1

Physics

Condensed Matter

Superconductivity

17 pages (RevTex), 8 Postscript figures

Scientific paper

A theoretical model for tunneling spectroscopy employing tight-binding band structure, d-wave gap symmetry, group velocity, and tunneling directionality can exhibit a wide range of characteristics similar to the ones found in tunneling experiments on high-Tc superconductors. Using a band structure obtained for optimally-doped Bi_2Sr_2CaCu_2O_8, the model tunneling density of states produces a good comparison to the point-contact tunneling conductance on the same material, especially in the gap region, displaying the same sub-gap shape and conductance peaks asymmetry.

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