Electronic band properties and superconductivity in La2−yXyCuO4
L. F. Mattheiss
DOI 10.1103/PhysRevLett.58.1028 · Physical Review Letters
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Abstract
The results of electronic-structure calculations for tetragonal La2CuO4 provide insight concerning the origin of high-temperature superconductivity in the La2−yXyCuO4 alloys. A half-filled Cu(3d)-O(2p) band with two-dimensional character and a nearly square Fermi surface produces a Peierls instability for y=0 that opens a semiconductor gap over the Fermi surface. Alloying with divalent or tetravalent atoms should spoil the nesting features while maintaining the strong coupling of O phonons to the conduction electrons.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-yXyCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
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