Eur. Phys. J. Appl. Phys.
Volume 65, Number 3, March 2014
|Number of page(s)||5|
|Section||Semiconductors and Devices|
|Published online||03 March 2014|
Theoretical studies on the spin Hamiltonian parameters for monovalent chromium in ZnX (X=S, Se, Te) and CdTe
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu
610054, P.R. China
2 School of Science, Southwest University of Science and Technology of China, Mianyang 621010, P.R. China
a e-mail: email@example.com
Revised: 18 December 2013
Accepted: 20 January 2014
Published online: 3 March 2014
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 − g s, where g s =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 (|Δg CT/Δg CF|) 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.
© EDP Sciences, 2014
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