Electronic and lattice dynamical properties of the iron-based superconductors LiFeAs and NaFeAs

Details Electronic and lattice dynamical properties of the iron-based superconductors LiFeAs and NaFeAs Electronic and lattice dynamical properties of the iron-based superconductors LiFeAs and NaFeAs

2008-12-05

arxiv.org/abs/0812.1215v1

R. A. Jishi and H. M. Alyahyaei, \^a??Electronic and Lattice Dynamical Properties of the Iron-Based Superconductors LiFeAs and

Physics

Condensed Matter

Superconductivity

7 pages, 5 figures,

Scientific paper

10.1155/2010/804343

The electronic structure and lattice vibrational frequencies of the newly discovered superconductors, LiFeAs and NaFeAs, are calculated within density functional theory. We show that in the vicinity of the Fermi energy, the density of states is dominated by contributions from Fe 3d states. We also calculate the electron-phonon coupling strength and show that it is too weak to account for the observed values of the superconducting transition temperatures. This seems to indicate that the iron-based superconductors are not of the conventional type.

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