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The Covalence Effect of the Electron States of ZnSe:Co

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The Covalence Effect of the Electron States of ZnSe:Co

2+

Jia-Jun Chena, Mao-Lu Dub, and Ti-Xian Zhenga

aDepartment of Physics and Electronic Information, China West Normal University, Nanchong 637002, China

bDepartment of Physics, Southwest University for Nationalities, Chengdu 610041, China Reprint requests to J.-J. C.; E-mail: chenjjnc@nc-public.sc.cninfo.net

Z. Naturforsch. 61a, 357 – 363 (2006); received April 24, 2006

In the investigation of the optical and magnetic properties of 3dNion impurities in semiconductors, the contribution of the covalence must be considered. A modified d function (d) and two covalent factors associated with the t2 and e orbitals have been adopted for describing this covalence. We present the contribution of the covalent factors to the energy matrix of the d7electron and d3hole system. This suggests that the dN electron system cannot be explained with the d10Nhole system when the covalence is considered. The calculation of the energy levels by the d7 energy matrix agrees with the experimental finding of ZnSe:Co2+. – PACS numbers: 71.70.Ch, 71.55.Gs

Key words: Ligand-Fields; Covalence Effect; II-VI Semiconductors; Optical Spectra.

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