Temperature Effects on the Phonon Spectrum in YBa2Cu3O7 Single Crystals and Thin Films
| Type of Publication: | Journal article |
| URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-31352 |
| Author: | Feile, Rudolf; Leiderer, Paul; Kowalewski, Jerzy; Assmus, Wolf; Schubert, J.; Poppe, Ulrich |
| Year of publication: | 1989 |
| Published in: | Journal of the Less Common Metals ; 151 (1989). - pp. 125-132 |
| DOI (citable link): | https://dx.doi.org/10.1016/0022-5088(89)90306-8 |
| Summary: |
We have performed a detailed investigation of the temperature dependence of the 385cm-1 phonon in single crystals and thin films of the YBa2Cu3O7 superconductor by means of Raman spectroscopy. In the single crystal the frequency of this phonon shows a downshift of about 5 cm-1 on passing the superconducting transition from above, which is referred to a strong electron-phonon interaction in the superconductor. The shift of the phonon in thin epitaxial films on MgO or SrTiO3 substrates is only about 2.5 cm-1. This difference may be a result of a structural transition in the single crystal which is possibly suppressed in the films because of the epitaxy. The electron-phonon interaction is also indicated by the asymmetry of the phonon line and a slight increase of the linewidth below Tc.
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| Subject (DDC): | 530 Physics |
| Link to License: | Attribution-NonCommercial-NoDerivs 2.0 Generic |
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FEILE, Rudolf, Paul LEIDERER, Jerzy KOWALEWSKI, Wolf ASSMUS, J. SCHUBERT, Ulrich POPPE, 1989. Temperature Effects on the Phonon Spectrum in YBa2Cu3O7 Single Crystals and Thin Films. In: Journal of the Less Common Metals. 151, pp. 125-132. Available under: doi: 10.1016/0022-5088(89)90306-8
@article{Feile1989Tempe-8989, title={Temperature Effects on the Phonon Spectrum in YBa2Cu3O7 Single Crystals and Thin Films}, year={1989}, doi={10.1016/0022-5088(89)90306-8}, volume={151}, journal={Journal of the Less Common Metals}, pages={125--132}, author={Feile, Rudolf and Leiderer, Paul and Kowalewski, Jerzy and Assmus, Wolf and Schubert, J. and Poppe, Ulrich} }
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