Investigation of the structure of GexAsySe1−x−y glasses by x-ray photoelectron spectroscopy
Date
2008-04-24
Authors
Wang, R. P.
Rode, A. V.
Choi, Duk-Yong
Luther-Davies, B.
Journal Title
Journal ISSN
Volume Title
Publisher
American Institute of Physics (AIP)
Abstract
We have measured and analyzed x-ray photoelectron spectra of a series of GexAsySe1−x−yglasses. The valence band spectra show that a number of Se-rich structures exist in the samples. After decomposing Ge, As, and Se3dspectra into several doublets and assigning them to the different local bond structures, it was found that, while GeSe₄/₂ tetrahedral, AsSe₃/₂ pyramidal, and Se trimers decrease in their integrated areas, most defect bonds increase with increasing mean coordination number. Moreover, while the appearance of Se trimers is reasonable in Se-rich samples, they never vanish, even in Se-poor samples. A possible mechanism to form Se trimers in Se-poor samples is discussed.
Description
Keywords
Keywords: Chemical bonds; Decomposition; Dimers; X ray photoelectron spectroscopy; Coordination number; Pyramidal; Glass
Citation
Collections
Source
Journal of Applied Physics
Type
Journal article
Book Title
Entity type
Access Statement
License Rights
Restricted until
Downloads
File
Description
Published Version