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arXiv · 1608.02405

Biaxial-stress-driven full spin polarization in ferromagnetic hexagonal chromium telluride

Xiang-Bo Xiao·Jun Li·Bang-Gui Liu
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Abstract

It is important to spintronics to achieve fully-spin-polarized magnetic materials that are stable and can be easily fabricated. Here, through systematical density-functional-theory investigations, we achieve high and even full spin polarization for carriers in the ground-state phase of CrTe by applying tensile biaxial stress. The resulting strain is tensile in the xy plane and compressive in the z axis. With the in-plane tensile strain increasing, the ferromagnetic order is stable against antiferromagnetic fluctuations, and a half-metallic ferromagnetism is achieved at an in-plane strain of 4.8%. With the spin-orbit coupling taken into account, the spin polarization is equivalent to 97% at the electronic phase transition point, and then becomes 100.0% at the in-plane strain of 6.0%. These make us believe that the full-spin-polarized ferromagnetism in this stable and easily-realizable hexagonal phase could be realized soon, and applied in spintronics.

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Xiang-Bo Xiao, Jun Li, Bang-Gui Liu. 2016-09-14. Biaxial-stress-driven full spin polarization in ferromagnetic hexagonal chromium telluride. https://doi.org/10.1016/j.jmmm.2016.11.082

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