Electronic band structure, phonon spectrum, and elastic properties of LaOFeAs

Details Electronic band structure, phonon spectrum, and elastic properties of LaOFeAs Electronic band structure, phonon spectrum, and elastic properties of LaOFeAs

2009-09-16

arxiv.org/abs/0909.2914v2

Physics

Condensed Matter

Superconductivity

9 pages, 5 figures, references with DOI information, corrected typos (Table 2, and sections 3.1 and 3.4)

Scientific paper

We present results of ab-initio calculations of the electronic band structure, lattice dynamical properties, and elastic constants of LaOFeAs, the parent compound of the recently discovered superconducting iron-oxypnictide (LaO1-xFxFeAs). The total and partial electronic density of states (EDOS) of the undoped LaOFeAs (in the insulating or metallic state) 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. The values of various independent elastic constants for both insulating and metallic states are estimated and discussed.

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