Current-dependent exchange-correlation potential for dynamical linear response theory

被引：358

作者：

Vignale, G ^{[1
]}

Kohn, W ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.77.2037

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The frequency-dependent exchange-correlation potential, which appears in the usual Kohn-Sham formulation of a time-dependent linear response problem, is a strongly nonlocal functional of the density, so that a consistent local density approximation generally does not exist. This problem can be avoided by choosing the current density as the basic variable in a generalized Kohn-Sham theory. This theory admits a local approximation which, for fixed frequency, is exact in the Limit of slowly varying densities and perturbing potentials.

引用

页码：2037 / 2040

页数：4

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