The layered structure of the iron based superconductors gives rise to a more or less pronounced two-dimensionality of their electronic structure, most pronounced in LaOFeAs. A consequence are distinct surface states to be expected to influence any surface sensitive experimental probe. In this work a detailed density functional analysis of the cleavage behavior and the surface electronic structure of LaOFeAs is presented. The surface states are obtained to form two-dimensional bands with their own Fermi surfaces markedly different from the bulk electronic structure.
@article{arxiv.1001.1127,
title = {Calculated Cleavage Behavior and Surface States of LaOFeAs},
author = {Helmut Eschrig and Alexander Lankau and Klaus Koepernik},
journal= {arXiv preprint arXiv:1001.1127},
year = {2013}
}