Superconducting order parameter in partially substituted Bi2Sr2CaCu2O8+x single crystals as measured by the tunneling effect

H. Hancotte; R. Deltour; D. N. Davydov; A. G. M. Jansen; P. Wyder

doi:10.1103/PhysRevB.55.R3410

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Superconducting order parameter in partially substituted Bi2Sr2CaCu2O8+x single crystals as measured by the tunneling effect

H. Hancotte, R. Deltour, D. N. Davydov, A. G. M. Jansen, P. Wyder

DOI 10.1103/PhysRevB.55.R3410 · Physical Review B

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Abstract

Tunneling-spectroscopy measurements have been performed on pure and Ni- and Zn-substituted Bi2Sr2CaCu2O8+x single crystals using a scanning tunneling microscope and a break-junction setup. The superconducting energy gap for the Ni-doped samples was found to be larger with respect to the pure samples. Anomalies have also been found in the temperature dependence of the gap for the Ni-substituted samples.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	86.5	Pressure not reported	onset
Bi2Sr1.9CaCu1.8O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	86.5	Pressure not reported	onset
Bi2Sr1.95Ca0.95CuNi2.05O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	73.5	Pressure not reported	onset
Bi2Sr2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	79	Pressure not reported	onset