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Fermi velocity enhancement in monolayer and bilayer graphene

机译:Fermi velocity enhancement in monolayer and bilayer graphene

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摘要

In single-layer graphene sheets non-local interband exchange leads to a renormalized Fermi-surface effective mass which vanishes in the low carrier-density limit. We report on a comparative study of Fermi surface effective mass renormalization in single-layer and AB-stacked bilayer graphene. We explain why the mass does not approach zero in the bilayer case, although its value is still strongly suppressed.

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