First-principles study of structural, electronic and magnetic properties of diluted magnetic semiconductor and superlattices based on Cr-doped ZnS and ZnSe compounds in wurtzite-type crystal
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Published:2024-03-01
Issue:2 Mar-Apr
Volume:70
Page:
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ISSN:2683-2224
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Container-title:Revista Mexicana de Física
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language:
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Short-container-title:Rev. Mex. Fís.
Author:
Hadj Zoubir Miloud,Cheref Oualid,Merabet Mostefa,Benalia Salah-Eddine,Djoudi Lakhdar,Rached Djamel,Boucharef M.
Abstract
We performed first-principle calculations to investigate the structural, electronic, and magnetic properties of ZnS and ZnSe binary compounds, Zn0.5Cr0.5S and Zn0.5Cr0.5Se DMS alloys and (ZnS)2/Zn0.5Cr0.5Se and (ZnSe)2/Zn0.5Cr0.5S superlattices in the wurtzite structure using the full potential linear muffin–tin orbital (FP-LMTO) method. Features such as lattice constant, modulus of compressibility and its first derivative, spin-polarized band structures, total and local or partial electronic densities of states and magnetic properties were calculated. The electronic structure shows that Zn0.5Cr0.5S and Zn0.5Cr0.5Se DMS alloys and (ZnS)2/Zn0.5Cr0.5Se and (ZnSe)2/Zn0.5Cr0.5S superlattices are half-metallic ferromagnetic with 100% complete spin polarization. The total magnetic moments calculated show the same integer value of 4 µB, which confirms the ferromagnetic half-metallic behavior of these compounds. We found that the ferromagnetic state is stabilized by the p-d exchange associated with the double-exchange mechanism. Zn0.5Cr0.5S and Zn0.5Cr0.5Se DMS alloys and (ZnS)2/Zn0.5Cr0.5Se and (ZnSe)2/Zn0.5Cr0.5S superlattices are shown to be promising new candidates for applications in the fields of spintronics.
Publisher
Sociedad Mexicana de Fisica A C