Decreasing giant splitting of longitudinal and transverse optical phonons in PbxSr1-xTiO3 due to Pb covalency
| dc.citation.epage | 3021 | en_US |
| dc.citation.issue | 16 | en_US |
| dc.citation.spage | 3019 | en_US |
| dc.citation.volume | 81 | en_US |
| dc.citation.woscount | 16 | |
| dc.contributor.author | Kuo, SY | en_US |
| dc.contributor.author | Li, CT | en_US |
| dc.contributor.author | Hsieh, WF | en_US |
| dc.contributor.department | 光電工程學系 | zh_TW |
| dc.contributor.department | Department of Photonics | en_US |
| dc.date.accessioned | 2014-12-08T15:41:50Z | |
| dc.date.available | 2014-12-08T15:41:50Z | |
| dc.date.issued | 2002-10-14 | en_US |
| dc.description.abstract | In contrast to the increase of giant splitting of longitudinal optical (LO) and transverse optical (TO) phonons in polycrystalline BaxSr1-xTiO3 [Phys. Rev. B. 64, 224103-1 (2001)], a decreasing splitting of the softest A(1)(1TO) and the hardest A(1)(3LO) was observed in PbxSr1-xTiO3. A similar structure but anomalous discrepancies in lattice dynamics of ABO(3) perovskite are related to the diverse electronic states of Pb2+ and Ba2+ ions. In this article, Pb-O interaction is proposed to be more hybridized than Ba-O, and thus the change of effective charge to the LO-TO splitting may be the dominant mechanism in PbxSr1-xTiO3, while unit-cell volume change is in the BaxSr1-xTiO3 systems. (C) 2002 American Institute of Physics. | en_US |
| dc.identifier.doi | 10.1063/1.1513660 | en_US |
| dc.identifier.issn | 0003-6951 | en_US |
| dc.identifier.journal | APPLIED PHYSICS LETTERS | en_US |
| dc.identifier.uri | http://dx.doi.org/10.1063/1.1513660 | en_US |
| dc.identifier.uri | https://ir.lib.nycu.edu.tw/handle/11536/28456 | |
| dc.identifier.wosnumber | WOS:000178460500035 | |
| dc.language.iso | en_US | en_US |
| dc.title | Decreasing giant splitting of longitudinal and transverse optical phonons in PbxSr1-xTiO3 due to Pb covalency | en_US |
| dc.type | Article | en_US |