Abstract
In the local density approximation (LDA) the electronic structure of aluminium is calculatedby use of the modified augmented plane wave method (MAPW) self-consistent scheme andthe exchange–correlation functional by Vosko, Wilk and Nusair. Since the MAPW schemeproduces wavefunctions especially suited for the calculation of the electronic momentumdensity distribution functions the improper integral defining the Compton profile (CP)Jn(q) in the direction converges well. A comparison with recent measurements of the CP along the principaldirections is highly satisfying after Lam–Platzman (LP) corrections are made. In theiroverall shape the second derivatives of the CPs are found to be in good accord with theexperimental results but give in detail no unambiguous information about the signatures ofthe Fermi surface breaks.
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