Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 16, Issue 21, Pages R637-R657Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/16/21/R01
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We discuss several different techniques for evaluating the Green function for a semi-infinite system using a localized basis. We demonstrate that the different techniques are different ways of calculating the self-energy associated with the surface. They give equivalent results but have different convergence properties.
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