Ni-substitution effects on the spin dynamics and superconductivity in La1.85Sr0.15CuO4
M. Matsuura, M. Fujita, H. Hiraka, M. Kofu, H. Kimura, S. Wakimoto, T. G. Perring, C. D. Frost, K. Yamada
DOI 10.1103/PhysRevB.86.134529 · Physical Review B
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Abstract
Systematic inelastic neutron scattering studies have been performed on La1.85Sr0.15Cu1−yNiyO4 in order to elucidate the microscopic mechanism of magnetic Ni impurity doping effects on spin dynamics and superconductivity. In contrast to Zn doping, which precipitates static or quasistatic spin correlations around dopant, Ni doping remarkably reduces Ecomme, the minimum energy of the upward branch of the hourglass-shaped magnetic dispersion where a commensurate magnetic peak is observed. Ni doping at y∼0.04 further reduces Ecomme to zero energy and broadens the distribution of Ecomme, corresponding to the appearance of the normal state at base temperature (T∼4 K) as well as the broadening of the superconducting transition.
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. | 36.8 | Pressure not reported | midpoint |
| La1.85Sr0.15Cu0.991Ni0.009O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | midpoint |
| La1.85Sr0.15Cu0.985Ni0.015O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22.9 | Pressure not reported | midpoint |
| La1.85Sr0.15Cu0.982Ni0.018O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22.5 | Pressure not reported | midpoint |
| La1.85Sr0.15Cu0.971Ni0.029O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.6 | Pressure not reported | midpoint |
| La1.85Sr0.15Cu0.97Ni0.03O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | midpoint |
| La1.85Sr0.15Cu0.96Ni0.04O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0 | Pressure not reported | midpoint |
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