title: Study of Ga incorporation in glassy arsenic selenides by high-resolution XPS and EXAFS.
abstract: Effect of Ga addition on the structure of vitreous As2Se3 is studied using high-resolution X-ray photoelectron spectroscopy and extended X-ray absorption fine structure techniques. The "8-N" rule is shown to be violated for Ga atoms and, possibly, for certain number of As atoms. On the contrary, Se keeps its 2-fold coordination according to "8-N" rule in the amorphous phase throughout all the compositions. Crystalline inclusions appear in the amorphous structure of the investigated glasses at Ga concentrations greater than 3 at. %. These inclusions are presumably associated with Ga2Se3 crystallites and transition phases/defects formed at the boundaries of these crystallites and host amorphous matrix. The existence of Ga-As and Se-Se bonds in the samples with higher Ga content is supported by present studies.
authors.affiliation: Department of Physics and Astronomy, Austin Peay State University, Clarksville, Tennessee 37044, USA.
authors.forename: R
authors.initials: R
authors.lastname: Golovchak
authors.affiliation: Equipe Verres et Céramiques UMR-CNRS 6226, Université de Rennes 1, 35042 Rennes Cedex, France.
authors.forename: Ya
authors.initials: Y
authors.lastname: Shpotyuk
authors.affiliation: Equipe Verres et Céramiques UMR-CNRS 6226, Université de Rennes 1, 35042 Rennes Cedex, France.
authors.forename: V
authors.initials: V
authors.lastname: Nazabal
authors.affiliation: Equipe Verres et Céramiques UMR-CNRS 6226, Université de Rennes 1, 35042 Rennes Cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Boussard-Pledel
authors.affiliation: Equipe Verres et Céramiques UMR-CNRS 6226, Université de Rennes 1, 35042 Rennes Cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Bureau
authors.affiliation: Center for Microelectronics and Nanotechnology, University of Rzeszow, 1, Pigonia Str., 35-310 Rzeszow, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Cebulski
authors.affiliation: Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, USA.
authors.forename: H
authors.initials: H
authors.lastname: Jain