Wigner crystallization in a single and bilayer graphene

Details Wigner crystallization in a single and bilayer graphene Wigner crystallization in a single and bilayer graphene

2007-06-12

arxiv.org/abs/0706.1689v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, latex file, 4 ps figure files

Scientific paper

We study the possibility of Wigner crystallization in both single- and and bi-layer graphene using a real space tight binding model. In addition to verifying our earlier prediction for single layer graphene, we predict that the bilayer graphene can undergo a Wigner crystal transition at low enough carrier density thus offering a possibility of tunable and bipolar Wigner crystal. We find that aside from the Coulomb interaction of the carriers of two layers that stabilizes the charge ordered state, so does the inter layer coupling.

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