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Polycrystalline graphene is a patchwork of coalescing graphene grains of varying lattice orientations and size, resulting from the chemical vapor deposition (CVD) growth at random nucleation sites on metallic substrates. The morphology of grain boundaries has become an important topic given its fundamental role in limiting the mobility of charge carriers in(More)
T he electronic properties of monolayer graphene strongly differ from those of two-dimensional metals and semiconductors, in part because of inherent electron–hole band structure symmetry and a particular density of states which vanishes at the Dirac point 1. Furthermore, the sublattice degeneracy and honeycomb symmetry lead to eigenstates that hold an(More)
The understanding of spin dynamics and relaxation mechanisms in clean graphene, and the upper time and length scales on which spin devices can operate, are prerequisites to realizing graphene-based spintronic technologies. Here we theoretically reveal the nature of fundamental spin relaxation mechanisms in clean graphene on different substrates with Rashba(More)
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