Pressure Dependence of Tc in Y-Ba-Cu-O Superconductors

X. J. Chen; H. Q. Lin; C. D. Gong

doi:10.1103/PhysRevLett.85.2180

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Pressure Dependence of Tc in Y-Ba-Cu-O Superconductors

X. J. Chen, H. Q. Lin, C. D. Gong

DOI 10.1103/PhysRevLett.85.2180 · Physical Review Letters

T1

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Abstract

By considering the recent widely accepted dispersion of electronic structure in cuprates, we analyze the pressure effect on the superconducting transition temperature Tc in Y-Ba-Cu-O systems. Two intrinsic variables, i.e., the effective attractive interaction Veff and the hole concentration nH in the CuO2 plane, are proposed to be responsible for the pressure effect on Tc. Theoretical calculations agree well with experiments. Our results also suggested that the in-plane lattice parameter dependence of effective attraction Veff obeys dlnVeff/dlna=−4∼−2 for Y-Ba-Cu-O systems.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.9Sr0.1CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	49.1	Pressure unresolved	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93.5	Pressure unresolved	unknown
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	80	Pressure unresolved	unknown