Theoretical investigations of the local structures and the g factors for 3d9 ions in CdS |
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Authors: | S. Y. Wu H. M. Zhang H. N. Dong X. F. Wang Y. X. Hu |
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Affiliation: | (1) Department of Applied Physics, University of Electronic Science and Technology of China, 610054 Chengdu, People’s Republic of China;(2) International Centre for Materials Physics, Chinese Academy of Sciences, 110016 Shenyang, People’s Republic of China;(3) College of Electronic Engineering, Chongqing University of Posts and Telecommunications, 400065 Chongqing, People’s Republic of China |
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Abstract: | The local structures and the g factors g // and g ⊥ for the isoelectronic 3d9 ions Cu2+ and Ni+ in CdS are theoretically investigated from the perturbation formulas of these parameters for a 3d9 ion under trigonally distorted tetrahedral environments. In consideration of significant covalency of the [MS4] combinations (M = Cu and Ni), the ligand orbital and spin–orbit coupling contributions are taken into account using the cluster approach. Based on the studies, the substitutional impurity Cu2+ (or Ni+) on Cd2+ site is found to undergo a small inward displacement 0.026 Å (or a slight outward shift 0.017 Å) towards (or away from) the ligand triangle along C 3 axis. The theoretical g factors for both ions based on the above impurity displacements are in good agreement with the experimental data. |
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