Superconductivity in the system Bi2Sr2−xLaxCuO6+δ: Hole formation by (LaO)+

W. Bauhofer; Hj. Mattausch; R. K. Kremer; P. Murugaraj; A. Simon

doi:10.1103/PhysRevB.39.7244

← Back to search

Superconductivity in the system Bi2Sr2−xLaxCuO6+δ: Hole formation by (LaO)+

W. Bauhofer, Hj. Mattausch, R. K. Kremer, P. Murugaraj, A. Simon

DOI 10.1103/PhysRevB.39.7244 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Superconductivity with a Tc as high as 25.5 K has been observed in Bi2Sr2CuO6 by partial substitution of Sr by La. Superconductivity is limited to a range of 10% to 38% substitution. In Bi2Sr2−xLaxCuO6+δ each La atom introduces one additional O atom into the crystal resulting in δ=x. Thereby one extra hole per substituted Sr atom is produced. We discuss the probable crystallographic site of the additional oxygen atoms with respect to the oxidation states of bismuth and copper in these compounds.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2-xLaxCuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	25.5	Pressure unresolved	onset
Bi2Sr2-xLaxCuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	25.5	Pressure unresolved	onset
Bi2Sr2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5	Pressure not reported	unknown
Bi2Sr2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	20	Pressure not reported	unknown