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001     281512
005     20240625085706.0
024 7 _ |a 10.1088/0953-8984/27/46/465201
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024 7 _ |a 0953-8984
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024 7 _ |a 1361-648X
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037 _ _ |a FZJ-2016-01201
041 _ _ |a English
082 _ _ |a 530
100 1 _ |a Zeller, Rudolf
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245 _ _ |a Dirac Green function for angular projection potentials
260 _ _ |a Bristol
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520 _ _ |a The aim of this paper is twofold: first, it is shown that the angular dependence of the Dirac Green function can be described analytically for potentials with non-local dependence on the angular variables if they are chosen as projection potentials in angular momentum space. Because the local dependence on the radial variable can be treated to any precision with present computing capabilities, this means that the Green function can be calculated practically exactly. Second, it is shown that a result of this kind not only holds for a single angular projection potential but also more generally, for instance if space is divided into non-overlapping cells and a separate angular projection potential is used in each cell. This opens the way for relativistic density-functional calculations within a different perspective than the conventional one. Instead of trying to obtain the density for a given potential approximately as well as possible, the density is determined exactly for non-local potentials which can approximate arbitrary local potentials as well as desired
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773 _ _ |a 10.1088/0953-8984/27/46/465201
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|t Journal of physics / Condensed matter
|v 27
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|x 1361-648X
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