Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6425
Title: Effects of interedge scattering on the Wigner crystallization in graphene nanoribbons
Authors: Modarresi, Mohsen
Güçlü, Alev Devrim
Keywords: Wigner crystallization
Graphene
Nanoribbons
Electrons
Issue Date: Jun-2017
Publisher: American Physical Society
Source: Modarresi, M., and Güçlü, A. D. (2017). Effects of interedge scattering on the Wigner crystallization in graphene nanoribbons. Physical Review B, 95(23). doi:10.1103/PhysRevB.95.235103
Abstract: We investigate the effects of coupling between the two zigzag edges of graphene nanoribbons on the Wigner crystallization of electrons and holes using a combination of tight-binding, mean-field Hubbard and many-body configuration interaction methods. We show that the thickness of the nanoribbon plays a crucial role in the formation of Wigner crystal. For ribbon widths smaller than 16 Å, increased kinetic energy overcomes the long-range Coulomb repulsion and suppresses the Wigner crystallization. For wider ribbons up to 38 Å wide, strong Wigner localization is observed for an even number of electrons, revealing an even-odd effect also found in the Coulomb-blockade addition spectrum. Interedge correlations are found to be strong enough to allow simultaneous crystallization on both edges, although an applied electric field can decouple the two edges. Finally, we show that Wigner crystallization can also occur for holes, albeit weaker than for electrons.
URI: http://doi.org/10.1103/PhysRevB.95.235103
http://hdl.handle.net/11147/6425
ISSN: 2469-9950
2469-9969
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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