| Autor: |
Ove Jepsen, I. I. Mazin, Rui Liu, Sergey N. Rashkeev, E. T. Heyen, Manuel Cardona, Ole Krogh Andersen |
| Rok vydání: |
1990 |
| Předmět: |
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| Zdroj: |
Physical Review Letters. 65:3048-3051 |
| ISSN: |
0031-9007 |
| DOI: |
10.1103/physrevlett.65.3048 |
| Popis: |
We have measured and calculated the dependence of the Raman phonon intensities of YBa{sub 2}Cu{sub 3}O{sub 7} on laser frequency. The local-density approximation and the linear muffin-tin-orbital method were used for the calculations. We find good agreement not only in the absolute phonon intensities in {ital zz} or {ital xx}/{ital yy} polarization but also in the shape of the resonance profiles. These results indicate that the local-density approximation gives an essentially correct description of the band structure and of the electron-phonon interaction {plus minus}2 eV around the Fermi energy. We interpret our data in terms of specific interband transitions and estimate the mode mixing. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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