Excitations of a diamagnetic hole state in the copper oxide superconductors

M. J. Rice; Y. R. Wang

doi:10.1103/PhysRevB.36.8794

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Excitations of a diamagnetic hole state in the copper oxide superconductors

M. J. Rice, Y. R. Wang

DOI 10.1103/PhysRevB.36.8794 · Physical Review B

T1

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Abstract

The strong infrared (ir) absorption features observed in the copper oxide superconductors are interpreted to be internal electronic and vibrational excitations of a spin-zero charge-transfer complex (P+) formed between a hole and an essentially single paramagnetic square planar CuO4 unit (P0). The large magnitude and bimodal frequency dependence of the electronic polarizability implied by the ir data for P+ favors a combined excitonic and "charged phonon" mechanism for superconductivity. It is possible that the carriers of the superconductivity are the highly correlated electrons belonging to the P0's, while the P+'s play the role of highly polarizable impurities. The P+'s can delocalize as band polarons.

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
YBa2Cu3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown