Two Resonant Magnetic Modes in an Overdoped High Tc Superconductor
S. Pailhès, Y. Sidis, P. Bourges, C. Ulrich, V. Hinkov, L. P. Regnault, A. Ivanov, B. Liang, C. T. Lin, C. Bernhard, B. Keimer
DOI 10.1103/PhysRevLett.91.237002 · Physical Review Letters
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Abstract
A detailed inelastic neutron scattering study of the overdoped high temperature copper oxide superconductor Y0.9Ca0.1Ba2Cu3O7 reveals two-distinct magnetic resonant modes in the superconducting state. The modes differ in their symmetry with respect to exchange between adjacent copper oxide layers. Counterparts of the mode with odd symmetry, but not the one with even symmetry, had been observed before at lower doping levels. The observation of the even mode resolves a long-standing puzzle, and the spectral weight ratio of both modes yields an estimate of the onset of particle-hole spin-flip excitations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y0.9Ca0.1Ba2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85.5 | Pressure not reported | onset |
| Y0.9Ca0.1Ba2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85.5 | Pressure not reported | onset |
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