Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 양인상 | - |
dc.date.accessioned | 2016-08-28T11:08:12Z | - |
dc.date.available | 2016-08-28T11:08:12Z | - |
dc.date.issued | 1999 | - |
dc.identifier.issn | 0374-4884 | - |
dc.identifier.other | OAK-177 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/218492 | - |
dc.description.abstract | We report Raman and infrared measurements of optical phonons in superconducting Sm 1.85Ce 0.15CuO 4 single crystals (T c = 15 K). All zone-center phonon modes predicted by a factor-group analysis have been identified, except for the low-frequency E g mode involving Sm(Ce) atoms. Two additional c-axis modes with A 1g symmetry were found at 134 cm -1 and 591 cm -1 in the Ramari spectra. We identify the 134 cm -1 mode as the lowest-frequency infrared-active c-axis A 2u mode, mixed into the Raman spectra due to disorder via a breakdown of the usual exclusive selection rule. The 591 cm -1 Raman mode is found to be closely connected with an extra infrared mode observed at the same frequency. Our measurements on Sm 2-xCe xCuO 4 (x = 0.0 - 0.18) ceramics show, for the first time, that the strong Raman peak at 591 cm -1 appears only in the narrow range of Ce-doping, 0.1 ≤ x ≤ 0.17, which nearly coincides with the Ce-doping range where the Sm 2-xCe xCuO 4 system is superconducting at low temperatures. | - |
dc.language | English | - |
dc.title | Optical phonons in superconducting Sm 1.85Ce 0.15CuO 4 single crystals | - |
dc.type | Article | - |
dc.relation.issue | 3 | - |
dc.relation.volume | 34 | - |
dc.relation.index | SCI | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.index | KCI | - |
dc.relation.startpage | 292 | - |
dc.relation.lastpage | 296 | - |
dc.relation.journaltitle | Journal of the Korean Physical Society | - |
dc.identifier.wosid | WOS:000079167200018 | - |
dc.identifier.scopusid | 2-s2.0-0033460994 | - |
dc.author.google | Choi E.-M. | - |
dc.author.google | Mun M.-O. | - |
dc.author.google | Yang I.-S. | - |
dc.author.google | Kim Y.J. | - |
dc.author.google | Kim J.H. | - |
dc.author.google | Park S.R. | - |
dc.author.google | Kim W.T. | - |
dc.author.google | Rha S.H. | - |
dc.author.google | Beom-hoan O. | - |
dc.contributor.scopusid | 양인상(7101797839) | - |
dc.date.modifydate | 20230210140835 | - |