Correlation of Tc with hole concentration in La2−xSrxCuO4−δ superconductors

M. W. Shafer; T. Penney; B. L. Olson

doi:10.1103/PhysRevB.36.4047

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Correlation of Tc with hole concentration in La2−xSrxCuO4−δ superconductors

M. W. Shafer, T. Penney, B. L. Olson

DOI 10.1103/PhysRevB.36.4047 · Physical Review B

T1

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Abstract

The electron deficiency (hole concentration) in the La2−xSrxCuO4−δ system is determined by a chemical method. Our results show a direct correlation between Tc and hole concentration. The hole concentration equals the Sr concentration to about x=0.15. For x>0.15, the hole concentration decreases and oxygen vacancies are formed. These results strongly support an all-electronic mechanism for superconductivity in this system.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	38	Pressure not reported	onset
YBa2Cu3O9-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
YBa2Cu3O6.6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown