Core-level binding energies of Ba, Sr, Ca, and Y for high-Tc superconductors and related oxides: A measure of hole concentration

M. Nagoshi; Y. Syono; M. Tachiki; Y. Fukuda

doi:10.1103/PhysRevB.51.9352

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Core-level binding energies of Ba, Sr, Ca, and Y for high-Tc superconductors and related oxides: A measure of hole concentration

M. Nagoshi, Y. Syono, M. Tachiki, Y. Fukuda

DOI 10.1103/PhysRevB.51.9352 · Physical Review B

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Abstract

We find a universal relationship between core-level binding energies of the Ba 3d5/2, Sr 3d5/2, Ca 2p3/2, and Y 3d5/2 levels and Tc among several hole-type high-Tc and related oxides (the Y, Bi, and Pb systems) with two Cu-O2 planes in a unit structure. The binding-energy dependence of Tc is very similar to the hole-concentration dependence of Tc. This suggests that the local electronic states around Ba, Sr, Ca, and Y should be common and the core-level binding energies of these elements can be a measure of the hole concentration for these oxides.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	onset
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	80	Pressure not reported	onset
Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	74	Pressure not reported	onset
Bi2Sr2Ca0.9Y0.1Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	86	Pressure not reported	onset
Bi2Sr2Ca0.8Y0.2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	88	Pressure not reported	onset
Bi2Sr2Ca0.6Y0.4Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	83	Pressure not reported	onset
IBi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	65	Pressure not reported	onset
IBi2Sr2Ca0.8Y0.2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	84	Pressure not reported	onset
IBi2Sr2Ca0.5Y0.5Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	77	Pressure not reported	onset
PbBaSrY0.8Ca0.2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	35	Pressure not reported	onset
TlSr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	77	Pressure not reported	unknown