Phenomenological theory for copper oxide high-Tc superconductors

C. H. Eab; I. M. Tang

doi:10.1103/PhysRevB.40.4427

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Phenomenological theory for copper oxide high-Tc superconductors

C. H. Eab, I. M. Tang

DOI 10.1103/PhysRevB.40.4427 · Physical Review B

T1

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Abstract

A phenomenological Ginzburg-Landau model for the newly discovered high-Tc superconducting series TlmBa2Can−1CunO2n+m+2 (m=1,2) and Bi2Sr2Can−1CunO2n+4 is formulated. It is assumed that the order parameters in adjacent CuO layers are coupled through a simple Josephson-effect-like tunneling. By minimizing the free energy, expressions for the transition temperatures of the n-layer superconductors are obtained. Using the published Tc’s of the first members of each series, the Tc’s of the higher members are obtained and are in good agreement with the experimental values.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	125	Pressure not reported	unknown
Ba0.8K0.4BiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30	Pressure not reported	unknown
La2-xSrxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown