Inhomogeneity-Induced Enhancement of the Pairing Interaction in Cuprate Superconductors
Maciej M. Maśka, Żaneta Śledź, Katarzyna Czajka, Marcin Mierzejewski
DOI 10.1103/PhysRevLett.99.147006 · Physical Review Letters
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Abstract
Scanning tunneling spectroscopy has recently discovered a positive correlation between the magnitude of the superconducting gap and positions of dopant oxygen atoms in Bi-based cuprates. We propose a microscopic mechanism that could be responsible for this effect. In particular, we demonstrate that the dopant-induced spatial variation of the atomic levels always enhances the superexchange interaction.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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