Interpreting atomic resolution spectroscopic images

Journal Article · Sun Dec 31 23:00:00 EST 2006 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.76.064303· OSTI ID:931652

Oxley, Mark P ^[1]; Varela del Arco, Maria ^[1]; Pennycook, Timothy J ^[1]; van Benthem, Klaus ^[1]; Findlay, Scott D. ^[2]; Allen, L. J. ^[2]; Pennycook, Stephen J ^[1]

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1. ORNL
2. University of Melbourne, Australia

Core-loss electron energy loss spectroscopy is a powerful experimental tool providing information about electronic structure essential for understanding the properties of new and emerging materials. Here we show that the shape and width of spectroscopic images do not show a simple variation with binding energy, as commonly assumed. Rather they exhibit a complex dependence on the effective nonlocal scattering potential, and also on the dynamical channeling and absorption of the incident probe through the specimen. Consequently, in LaMnO$$_3$$, the low lying La N$$_{4,5}$$ edge at 99 eV can produce images of similar width to higher lying edges such as the O $$K$$ edge at 532 eV.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931652
• Journal Information: Physical Review B, Journal Name: Physical Review B Vol. 76
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
BINDING ENERGY
DATA ANALYSIS
ELECTRONIC STRUCTURE
ENERGY-LOSS SPECTROSCOPY
RESOLUTION
SCATTERING
SPECTRA