Charge fluctuations between CuO2 layers in high-temperature superconductors

R. Friedberg; T. D. Lee

doi:10.1103/PhysRevB.39.11482

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Charge fluctuations between CuO2 layers in high-temperature superconductors

R. Friedberg, T. D. Lee

DOI 10.1103/PhysRevB.39.11482 · Physical Review B

T1

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Abstract

A simple model based on the phase transition between a Bose liquid and a Fermi gas is presented. We show that under certain assumptions the long-range (distance greater than 3 Å) Coulomb forces favor charge fluctuations between neighboring CuO2 layers in high-temperature superconductors, provided that the number n of CuO2 layers within a unit cell is 2 or greater (with the convention that n=1 for La 2:1:4 and n=2 for Y 1:2:3, etc.). Qualitative discussion of the variation of Tc on n, and on the doping parameter, is given.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown