= Fourfold graphene Hall sequence
{title2=$\nu=4(N+1/2)$}
With unresolved <spin> and valley splittings, each <graphene> <Landau level> has areal degeneracy $4e|B|/h$. Counting carriers from a half-filled zero level yields integer Hall plateaux at filling factors $\pm2,\pm6,\pm10,\ldots$. For fixed positive density $n$, plateau-centre fields are $nh/(e\nu)$ and ideal extended-level centres have $B_j=nh/(4ej)$. Localization and level broadening determine finite plateau widths; degeneracy counting does not determine them.
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