Phys. Rev. B 62, 14427–14430 (2000)Absence of the zero bias peak in vortex tunneling spectra of high-temperature superconductorsReceived 20 July 2000; published in the issue dated 1 December 2000 The c-axis tunneling matrix of high-Tc superconductors is shown to depend strongly on the in-plane momentum of electrons and vanish along the four nodal lines of the dx2-y2-wave energy gap. This anisotropic tunneling matrix suppresses completely the contribution of the most extended quasiparticles in the vortex core to the c-axis tunneling current and leads to a spectrum similar to that of a nodeless superconductor. Our results give a natural explanation of the absence of the zero-bias peak as well as other features observed in the vortex tunneling spectra of high-Tc cuprates. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.62.14427
DOI:
10.1103/PhysRevB.62.14427
PACS:
74.50.+r, 74.25.Jb, 61.16.Ch
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