文章基本信息

标题：Emergence of Superconductivity in LaOFeAs: Electronic Structure and Lattice Dynamics
其他标题：Emergence of Superconductivity in LaOFeAs: Electronic Structure and Lattice Dynamics
作者：M. Aftabuzzaman ; A.K.M. A. Islam ; S. H. Naqib 等
期刊名称：Journal of Scientific Research
印刷版ISSN：2070-0237
电子版ISSN：2070-0245
出版年度：2011
卷号：3
期号：1
页码：1
DOI：10.3329/jsr.v3i1.6211
语种：English
出版社：Rajshahi University
摘要：In view of continuing interest in the parent compound of the recently discovered superconducting iron-oxypnictide (LaO1-xFxFeAs) we present fresh results and analyses of ab-initio calculations of the electronic band structure, lattice dynamical properties, and elastic constants assuming it to be insulating as well as metallic. The total and partial electronic density of states (EDOS) of the undoped LaOFeAs in both states are extracted from the electronic band structure. The phonon dispersion and the phonon density of states (PDOS) are also studied. Possible implications of the band structure, EDOS, and PDOS of LaOFeAs on the eventual appearance of high-Tc superconductivity upon carrier doping are discussed. Our findings reveal that phonons are unlikely to mediate Cooper pairing in RE-OFeAs. In addition, the values of various independent elastic constants of the compound assuming both insulating and metallic states are estimated and discussed. Keywords: LaOFeAs; Electronic band structure; Phonon spectrum; Elastic constants; Superconductor.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i1.6211 J. Sci. Res. 3 (1), 1-11 (2011)
关键词：Physics;LaOFeAs; Electronic band structure; Phonon spectrum; Elastic constants; Superconductor.