Two-dimensional intrinsic ferrovalley GdI2 with large valley polarization

Manipulation of the valley degree of freedom provides a novel paradigm in quantum information technology. In this work, through first principles calculations, we demonstrate that monolayer GdI2 is a promising candidate material for valleytronic applications. Monolayer GdI2 can be easily exfoliated from bulk, and it is spontaneously valley polarized with a giant splitting of 149 meV due to its intrinsic ferromagnetism and large spin orbital coupling. The anomalous valley Hall effect could be realized in monolayer GdI2 by an appropriate external electric field. Furthermore, the valley polarization feature is stable against the biaxial in-plane strain. Our findings provide an extraordinary and potential material platform for experimental studies and practical applications in the emergent field of valleytronics.

Automated summary

Computational analysis reveals that monolayer GdI2 shows valuable valley polarization properties and significant splitting, making it a promising candidate for valleytronic applications. The material's stability under certain external conditions provides potential for practical use in the field of valley electronics.