Many-body diagrammatic expansion in a Kohn-Sham basis: Implications for time-dependent density functional theory of excited states

被引：60

作者：

Tokatly, IV ^{[1
]}

Pankratov, O ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Lehrstuhl Theoret Feskorperphys, D-91054 Erlangen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.86.2078

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We formulate diagrammatic rules for many-body perturbation theory which uses Kohn-Sham Green's functions as basic propagators. The diagram technique allows one to study the properties of the dynamic nonlocal exchange-correlation (xc) kernel f(xc). We show that the spatial nonlocality of f(xc) is strongly frequency dependent. In particular, in extended systems the nonlocality range diverges at the excitation energies. This divergency is related to the discontinuity of the re potential.

引用

页码：2078 / 2081

页数：4

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