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Theoretical studies on the spin Hamiltonian parameters for monovalent chromium in ZnX (X=S, Se, Te) and CdTe

Published online by Cambridge University Press:  03 March 2014

Xian-Fen Hu*
Affiliation:
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China School of Science, Southwest University of Science and Technology of China, Mianyang 621010, P.R. China
Shao-Yi Wu
Affiliation:
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China
Min-Quan Kuang
Affiliation:
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China
Guo-Liang Li
Affiliation:
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China
*
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Abstract

The spin Hamiltonian parameters (g factor and hyperfine structure constants) of Cr+ in ZnX (X = S, Se, Te) and CdTe are theoretically investigated, using the perturbation formulas of these parameters for a tetrahedral 3d5 cluster. Both the contributions from the crystal-field (CF) and charge transfer (CT) mechanisms are considered from the cluster approach. The calculated results show good agreement with the experimental data. The CT contribution to g-shift Δg (=g − gs, where gs =2.0023 is the spin only value) is opposite (positive) in sign related to the CF one, and its importance (characterized by the relative ratio (|ΔgCTgCF|) is 11%, 66% and 104% (71%) for ZnS, ZnSe and ZnTe (CdTe), respectively. ACT from the CT contribution to hyperfine structure constant is the same (positive) in sign and about 50–53% in magnitude as compared with ACF from the CF one.

Type
Research Article
Copyright
© EDP Sciences, 2014

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