title: 1D lattice distortions as the origin of the (2 x 2)p4gm reconstruction in gamma'-Fe4N(100): a magnetism-induced surface reconstruction.
abstract: The (100) surface of magnetic gamma'-Fe4N films epitaxially grown on Cu(100) shows a (2 x 2)p4gm reconstruction. The atom positions determined experimentally are properly accounted for by first-principles total energy calculations, which further reveal that the (2 x 2)p4gm reconstruction requires the topmost Fe4N2 plane to be magnetic and effectively decoupled from the rest of the crystal and that it originates from the perpendicular crossing of one-dimensionally dimerized Fe chains.
authors.affiliation: Instituto de Ciencia de Materiales de Madrid-CSIC, Cantoblanco, 28049-Madrid, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Gallego
authors.forename: D O
authors.initials: DO
authors.lastname: Boerma
authors.forename: R
authors.initials: R
authors.lastname: Miranda
authors.forename: Felix
authors.initials: F
authors.lastname: Ynduráin