Coupling between superconductivity and structural deformation in La2−xSrxCuO4 (x∼0.13)
M. Braden, O. Hoffels, W. Schnelle, B. Büchner, G. Heger, B. Hennion, I. Tanaka, H. Kojima
DOI 10.1103/PhysRevB.47.12288 · Physical Review B
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Abstract
Capacitance-dilatometer measurements of the anisotropic thermal expansion on a superconducting single crystal of La2−xSrxCuO4 (x∼0.13) show large anomalies at the structural transition from the high-temperature tetragonal to the low-temperature orthorhombic phase followed by smaller anomalies of the opposite sign at the superconducting phase transition. Neutron-diffraction experiments on the same crystal indicate that at Tc the tilt of the CuO6 octahedra related to the structural phase transition is frozen in.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.87Sr0.13CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 32.5 | Pressure not reported | unknown |
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