Observation of long-range compositional fluctuations in glasses: implications for atomic and electronic structure.
Experimental evidence for long-range compositional fluctuations in glasses is given. The implications for electronic structure and stoichiometry-induced structural variations are analyzed. These fluctuations were discovered by examining the spatial dependence of inner shell near-edge absorption spectra obtained using a 50nm diameter probe. This spectroscopy is sensitive to both angular and distance correlations in bonding. Comparisons with spectra from compositionally equivalent crystals, and multiple-scattering calculations which include core-hole effects are used to analyze the data.
Department of Physics and Astronomy, Arizona State University, Tempe, AZ 85287-1504, USA. nan.jiang@asu.edu
Nan
N
Jiang
Jianrong
J
Qiu
C J
CJ
Humphreys
John C H
JC
Spence
D004583:Electrons; D005898:Glass / Q000737:chemistry*; D015394:Molecular Structure; D013057:Spectrum Analysis / Q000379:methods*