Electronic Raman scattering in YBa2 Cu3 O7sand other superconducting cuprates
T. Strohm, M. Cardona
DOI 10.1103/PhysRevB.55.12725 · Physical Review B
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Abstract
Superconductivity-induced structures in the electronic Raman spectra of high-Tc superconductors are computed using the results of ab initio local-density approximation linear muffin-tin-orbital three-dimensional band-structure calculations via numerical integrations of the mass fluctuations, either in the whole three-dimensional Brillouin zone or limiting the integrations to the Fermi surface. The results of both calculations are rather similar, the Brillouin-zone integration yielding additional weak structures related to the extended van Hove singularities. Similar calculations have been performed for the normal state of these high-Tc cuprates. Polarization configurations have been investigated and the results have been compared to experimental spectra. The assumption of a simple dx2−y2-like gap function allows us to explain a number of experimental features but is hard to reconcile with the relative positions of the A1g and B1g peaks.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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