Interlayer screening effect in graphene multilayers with A B A and A B C stacking

By M. Koshino. 2009

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We study the effect of perpendicular electric fields on the band structures of $ABA$ and $ABC$ graphene multilayers, and find that the electronic screening effect is significantly different between them. In $ABA$ multilayers, the field produces a band overlap and gives a linear screening, while in $ABC$ multilayers, in contrast, it opens an energy gap in the surface-state band at low energy, leading to a strong screening effect essentially nonlinear to the field amplitude. The energy gap of a large $ABC$ stack sharply rises when the external field exceeds a certain critical value.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/c21f45f3f03442906327c351cf82d1925e1bd2dd