Two pairing domes as Cu2+ varies to Cu3

Using a tight-binding two-orbital (dx2−y2, d3z2−r2) model and a random phase approximation treatment of the spin-fluctuation pairing vertex, we calculate the pairing strengths for a cuprate model in which the hole doping varies from Cu2+ to Cu3+. We find two domes of pairing strength: one correspond...

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Bibliographic Details
Published in:Physical review. B 2019-06, Vol.99 (22), p.1
Main Authors: Maier, Thomas, Berlijn, T, Scalapino, D J
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Copper
Domes
Doping
Variations
Online Access:Get full text
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Summary:Using a tight-binding two-orbital (dx2−y2, d3z2−r2) model and a random phase approximation treatment of the spin-fluctuation pairing vertex, we calculate the pairing strengths for a cuprate model in which the hole doping varies from Cu2+ to Cu3+. We find two domes of pairing strength: one corresponding to the traditional low hole doping regime and the other to the extremely overdoped regime discussed by Geballe and Marezio [Physica C 469, 680 (2009)]. In the overdoped regime we find that there is significant pairing strength in both the d-wave and s± channels.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.99.224515