Noninteracting band model for dielectric screening in transition metals: application to paramagnetic nickel

Prakash, Satya ; Joshi, Shri Krishna (1970) Noninteracting band model for dielectric screening in transition metals: application to paramagnetic nickel Physical Review B, 2 (4). pp. 915-927. ISSN 0163-1829

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Official URL: http://prb.aps.org/abstract/PRB/v2/i4/p915_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.2.915

Abstract

The static dielectric function is studied for a transition metal on the basis of a model band structure with noninteracting s and d bands. The free-electron approximation is used for electrons in the s band, while a simplified tight-binding scheme is used for the d electrons. Explicit expressions are obtained for the intraband and interband contributions to the dielectric function. The model is applied to calculate the static dielectric function for paramagnetic nickel for (3d)9(4s)1 and (3d)9.4(4s)0.6 configurations along the three principal symmetry directions [100], [110], and [111]. The contributions due to the intraband and interband transitions are compared: It is found that the major contribution to the dielectric function is due to the intraband transitions.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:14484
Deposited On:12 Nov 2010 14:12
Last Modified:19 Feb 2011 07:53

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