Realization of permanent valley polarization in Cr-doped monolayer MoS₂ is found to be unfeasible because of extended moment formation. Introduction of an additional hole is suggested as a viable solution. V-doped monolayer MoS₂ is demonstrated to sustain permanent valley polarization and therefore can serve as a prototype material for valleytronics.
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Singh et al. (2016) studied this question.
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