Superconductivity-induced changes of the phonon resonances in RBa2Cu3O7 (R=Yb, Er, Sm, Nd)
S. Ostertun, J. Kiltz, A. Bock, U. Merkt, T. Wolf
DOI 10.1103/PhysRevB.64.064521 · Physical Review B
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Abstract
We observe a characteristic energy ħωc≈2.1 eV which separates regions of different behavior of the phonon intensities in the Raman spectra of the RBa2Cu3O7 system. A superconductivity-induced drop of phonon intensities is found for the oxygen modes O(4) and O(2)-O(3) only for excitation energies below ħωc. This intensity drop indicates an order parameter which affects energies in the vicinity of ħωc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YbBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 76 | Pressure not reported | unknown |
| ErBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81 | Pressure not reported | unknown |
| SmBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure not reported | unknown |
| NdBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95 | Pressure not reported | unknown |
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