Split of zero-bias conductance peak in normal-metal / d-wave superconductor junctions

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Effects of impurity scatterings on the conductance in normal-metal / $d$ wave superconductor junctions are discussed by using the single-site approximation. So far, the split of the zero-bias conductance peak has been believed to be an evidence of the broken time reversal symmetry states at the surface of high-$T_c$ superconductors. In this paper, however, it is shown that the impurity scattering near the interface also causes the split of the zero-bias conductance peak. Typical conductance spectra observed in experiments at finite temperatures and under external magnetic fields are explained well by the present theory.
12 pages, revised version

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Superconductivity, Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/20885

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0302287
 http://arxiv.org/abs/cond-mat/0302287

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arXiv