Absence of the zero bias peak in vortex tunneling spectra of high temperature superconductors?

Details Absence of the zero bias peak in vortex tunneling spectra of high temperature superconductors? Absence of the zero bias peak in vortex tunneling spectra of high temperature superconductors?

2000-07-14

arxiv.org/abs/cond-mat/0007243v3

Physics

Condensed Matter

Superconductivity

4 pages 3 figures, minor corrections, to appear in Phys Rev B

Scientific paper

10.1103/PhysRevB.62.14427

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 d(x^2-y^2)-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.

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