Observation of incommensurate magnetic correlations at the lower critical concentration for superconductivity in La2−xSrxCuO4 (x=0.05)
S. Wakimoto, G. Shirane, Y. Endoh, K. Hirota, S. Ueki, K. Yamada, R. J. Birgeneau, M. A. Kastner, Y. S. Lee, P. M. Gehring, S. H. Lee
DOI 10.1103/PhysRevB.60.R769 · Physical Review B
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Abstract
Neutron-scattering experiments have been performed on lightly doped La2−xSrxCuO4 single crystals in both the insulating (x=0.03,0.04,0.05) and superconducting (x=0.06) regions. Elastic magnetic peaks are observed at low temperatures in all samples with the maximum peak linewidth occurring at the critical concentration xc=0.05. Incommensurate peaks are observed only at x=0.05, the positions of which are rotated by 45° in reciprocal space about (π,π) from those observed for x>~0.06 in the superconducting phase.
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. | 12 | Pressure not reported | unknown |
| La1.88Sr0.12CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31 | Pressure not reported | onset |
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