title: InP(001)-(2 x 1) surface: a hydrogen stabilized structure.
abstract: The InP(001)(2 x 1) surface has been reported to consist of a semiconducting monolayer of buckled phosphorus dimers. This apparent violation of the electron counting principle was explained by effects of strong electron correlation. Combining first-principles calculations with reflectance anisotropy spectroscopy and LEED experiments, we find that the (2 x 1) reconstruction is not at all a clean surface: it is induced by hydrogen adsorbed in an alternating sequence on the buckled P dimers. Thus, the microscopic structure of the InP growth plane relevant to standard gas phase epitaxy conditions is resolved and shown to obey the electron counting rule.
authors.affiliation: Institut für Festkörpertheorie und Theoretische Optik, Friedrich-Schiller-Universität, Max-Wien-Platz 1, 07743 Jena, Germany. W.G.Schmidt@ifto.physic.uni-jena.de
authors.forename: W G
authors.initials: WG
authors.lastname: Schmidt
authors.forename: P H
authors.initials: PH
authors.lastname: Hahn
authors.forename: F
authors.initials: F
authors.lastname: Bechstedt
authors.forename: N
authors.initials: N
authors.lastname: Esser
authors.forename: P
authors.initials: P
authors.lastname: Vogt
authors.forename: A
authors.initials: A
authors.lastname: Wange
authors.forename: W
authors.initials: W
authors.lastname: Richter