Abstract

We analyze how the coherence peaks observed in scanning tunneling spectroscopy (STS) of cuprate high-temperature superconductors are transferred from the cuprate layer to the oxide layers adjacent to the STS microscope tip. For this purpose, we have carried out a realistic multiband calculation for the superconducting state of Bi₂Sr₂CaCu₂O₈₊δ (Bi2212) assuming a short-range d-wave pairing interaction confined to the nearest-neighbor Cu dₓ2y2 orbitals. The resulting anomalous matrix elements of the Green’s function allow us to monitor how pairing is then induced not only within the cuprate bilayer but also within and across other layers and sites. The symmetry properties of the various anomalous matrix elements and the related selection rules are delineated.

Notes

Originally published in Physical Review B v.83 (2011): 024501. DOI: 10.1103/PhysRevB.83.024501

Keywords

scanning tunneling spectroscopy, STS, Bi₂Sr₂CaCu₂O₈+δ

Subject Categories

Superconductivity, Spectrum analysis, Superconductors

Disciplines

Physics

Publisher

American Physical Society

Publication Date

1-4-2011

Rights Information

Copyright 2011 American Physical Society.

Rights Holder

American Physical Society

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