Simple model for the linewidth of the two-magnon Raman feature observed in high-Tc superconductors
W. H. Weber, G. W. Ford
DOI 10.1103/PhysRevB.40.6890 · Physical Review B
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Abstract
The conventional theory for two-magnon Raman scattering applied to La2CuO4 and other nonsuperconducting precursor phases of the cuprate-based high-Tc materials yields a line shape much narrower than is observed. We modify this theory to allow for a finite magnon lifetime and to allow for a relaxation of momentum conservation in the scattering process. The former modification gives results in good agreement with the experiments; the latter does not. We argue that a probable source of the magnon damping is electronic excitations associated with the free carriers.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 40 | Pressure not reported | onset |
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