Showing cond-mat.mtrl-sciShow all
2 papers · 1 filter
cond-mat.mtrl-sci2001
Interference between Extrinsic and Intrinsic Losses in XAFS
L. Campbell, L. Hedin, J. J. Rehr +1
The interference between extrinsic and intrinsic losses in x-ray absorption fine structure (XAFS) is treated within a Green's function formalism, without explicit reference to fina…
cond-mat.mtrl-sci2001
The sudden approximation in photoemission and beyond
L. Hedin, J. D. Lee
The conditions behind the sudden approximation are critically examined. The fuzzy band expression is derived in detail from first principles. We go beyond the sudden approximation…