Optimal superconductivity in La2−xSrxCuO4

J.-S. Zhou; J. B. Goodenough; H. Sato; M. Naito

doi:10.1103/PhysRevB.59.3827

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Optimal superconductivity in La2−xSrxCuO4

J.-S. Zhou, J. B. Goodenough, H. Sato, M. Naito

DOI 10.1103/PhysRevB.59.3827 · Physical Review B

T1

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Abstract

The temperature dependence of the resistivity ρ(T) and the thermoelectric power α(T) have been measured under hydrostatic pressure on a single-crystal film of La1.85Sr0.15CuO4 deposited on a LaSrAlO4 substrate. The compressive biaxial stress built into the film raises Tc at ambient pressure. Tc increased with pressure P<3.3 kbar, but saturated at a pressure-independent Tc=43.7 at pressures P>3.3 kbar. A low-temperature enhancement of α(T) having a Tmax≈140 K increased with Tc. The data are discussed within the framework of a vibronic model of the superconductive phase.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	43	Pressure unresolved	zero_resistance
La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	43.7	0.33 GPa	zero_resistance
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	36	Pressure unresolved	unknown
La1.9Sr0.1CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	49	Pressure not reported	unknown