Journal
PHYSICS LETTERS A
Volume 368, Issue 1-2, Pages 112-116Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2007.03.061
Keywords
ZnO; LDA plus U; bonding mechanism
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The electronic structure and the bonding mechanism of ZnO have been studied by using the Full-Potential Linear Augmented Plane Wave (FP-LAPW) method within the density-functional theory (DFT) based on LDA + U exchange correlation potential. The valence and the bonding charge density are calculated and compared with those derived from LDA and GGA to describe the bonding mechanism. The charge transfer along with the bonding process is analyzed by using the theory of Atoms in Molecules (AIM). The bonding, the topological characteristics and the p-d coupling effects on the bonding mechanism of ZnO are shown quantitatively with the critical points (CPs) along the bonding trajectory and the charge in the atomic basins. Meanwhile, the bonding characteristics for wurtzite, zinc blende and rocksaft phase of ZnO are discussed systematically in the present paper. (c) 2007 Elsevier B.V. All rights reserved.
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