Superconductivity and the low-temperature orthorhombic to tetragonal phase transition in La2−xBaxCuO4
S. J. L. Billinge, G. H. Kwei, A. C. Lawson, J. D. Thompson, H. Takagi
DOI 10.1103/PhysRevLett.71.1903 · Physical Review Letters
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Abstract
The relationship between the low temperature orthorhombic-tetragonal (OT) phase transition in La2−xBaxCuO4 and the suppression of the superconducting state in samples with x=0.125 has been investigated. Using high resolution synchrotron x-ray diffraction we show that the phase composition of a superconducting x=0.15 sample varies with temperature identically to an x=0.125 sample. This shows that the tetragonal structure does support bulk superconductivity in La2−xBaxCuO4 and the electronic transition which suppresses superconductivity at x=0.125 is distinct from the OT structural transition.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xBaxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 27 | Pressure not reported | onset |
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