Two-particle resonance pairing mechanism of oxide superconductivity

D. M. Newns

doi:10.1103/PhysRevB.36.5595

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Two-particle resonance pairing mechanism of oxide superconductivity

D. M. Newns

DOI 10.1103/PhysRevB.36.5595 · Physical Review B

T1

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Abstract

The oxide superconductors La2−xSrxCuO4 and YBa2Cu3O6.5+y are treated as strongly correlated electron systems consisting of Cu ions with an on-site electron-electron interaction U of order 10 eV interacting via oxygen bands. Pairing occurs via scattering of quasiparticles into the two-particle resonance at energy U. The model is expressed in a slave-boson formalism and solved in mean field. The results explain the observed scaling of Tc with hole concentration and are consistent with other data.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6.5+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La3-xBa3+xCu6O14+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown