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 dₓ2₋y2 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.
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
Recommended Citation
Suominen, Ilpo; Nieminen, Jouko; Markiewicz, R. S.; and Bansil, A., "Induced superconductivity in noncuprate layers of the Bi₂Sr₂CaCu₂O₈+δ high-temperature superconductor: Modeling of scanning tunneling spectra" (2011). Physics Faculty Publications. Paper 398.
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Notes
Originally published in Physical Review B v.83 (2011): 024501. DOI: 10.1103/PhysRevB.83.024501