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The electron-phonon coupling of LaO$_{1-x}$F$_x$FeAs is re-investigated onthe basis of density functional theory in local density approximation. Theimplications of the $(\pi,\pi)$ nesting of the Fermi surfaces are carefullystudied and found to lead to a non-standard electron-phonon coupling of thecorresponding Fe in-plane breathing mode, which might make a strongcontribution to the high superconducting transition temperature. Thesemi-metallic behavior of the undoped material is also further illuminated.

Strong electron-phonon coupling of the Fe breathing mode of LaO_{1-x}F_xFeAs