Enhanced superconductivity in metallic oxides near the metal-insulator transition

M. S. Osofsky; R. J. Soulen, Jr.; J. H. Claassen; G. Trotter; H. Kim; J. Horwitz

doi:10.1103/PhysRevB.66.020502

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Enhanced superconductivity in metallic oxides near the metal-insulator transition

M. S. Osofsky, R. J. Soulen, Jr., J. H. Claassen, G. Trotter, H. Kim, J. Horwitz

DOI 10.1103/PhysRevB.66.020502 · Physical Review B

T1

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Abstract

Several metallic oxide conductors reported in the literature undergo a metal-insulator transition (MIT). We have found that their reported superconducting transition temperatures Tc are significantly enhanced in the vicinity of the MIT. We constructed a superconductivity phase diagram (Tc vs σ, the conductivity) for each system and found that they are remarkably similar. The same behavior was found previously for a number of low-Tc superconductors. These results suggest that there is a common mechanism for the enhancement of superconductivity near the MIT.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	45	Pressure not reported	unknown
BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9.7	Pressure not reported	unknown
Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	20	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	unknown
La2-xBaxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	45	Pressure not reported	unknown
In2O3-xSn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3	Pressure not reported	unknown
Bi2Sr2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	85	Pressure not reported	unknown