1. First-Principles Investigation of Half-metallic Ferromagnetism in V-doped BeS, BeSe, and BeTe.
- Author
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Doumi, B., Tadjer, A., Dahmane, F., Djedid, A., Yakoubi, A., Barkat, Y., Ould Kada, M., Sayede, A., and Hamada, L.
- Subjects
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SPINTRONICS , *FERROMAGNETISM , *SEMICONDUCTOR doping , *SPIN polarization , *GROUND state (Quantum mechanics) , *VANADIUM , *CHALCOGENIDES - Abstract
We have investigated the electronic structure and half-metallic ferromagnetism in zinc blende phase of BeVM (M=S, Se, Te) at concentration x=0.125 by employing a first-principles calculations within the framework of density functional theory (DFT) based on the linearized augmented plane wave method (FP-LAPW), as implanted in the WIEN2k code with generalized gradient approximation functional proposed by Wu and Cohen (WC-GGA). The electronic properties exhibit half-metallic behavior. So the density of states shows the hybridization between the p (S, Se, Te) and 3d (V) states that creates the antibonding states in the gap, which stabilizes the ferromagnetic ground state associated with the double-exchange mechanism, whereas the spin polarized band structures depict half-metallic gap that increases from BeVS to BeVSe to BeVTe. These compounds are robust half-metallic ferromagnets with spin polarization of 100 % and predicted to be potential candidates for spin injection applications in spintronic devices. Therefore, our predictions require an experimental confirmation in the future. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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