Ferromagnetism in Narrow Bands of Moiré Superlattices.
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DOI: 10.1103/physrevlett.124.187601
Abstract: Many graphene moiré superlattices host narrow bands with nonzero valley Chern numbers. We provide analytical and numerical evidence for a robust spin and/or valley polarized insulator at total integer band filling in nearly flat bands… read more here.
Keywords: moir superlattices; graphene; valley; band ... See more keywords