Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6134
Title: Wigner crystallization at graphene edges
Authors: Güçlü, Alev Devrim
Keywords: Graphene
Wigner crystallization
Issue Date: 12-Jan-2016
Publisher: American Physical Society
Source: Güçlü, A. D. (2016). Wigner crystallization at graphene edges. Physical Review B, 93(4). doi:10.1103/PhysRevB.93.045114
Abstract: Using many-body configuration interaction techniques, we show that Wigner crystallization occurs at the zigzag edges of graphene at surprisingly high electronic densities up to 0.8nm-1. In contrast with one-dimensional electron gas, the flatband structure of the edge states makes the system interaction dominated, facilitating electronic localization. The resulting Wigner crystal manifests itself in pair-correlation functions, and evolves smoothly as the edge electron density is lowered. We also show that the crystallization affects the magnetization of the edges. While the edges are fully polarized when the system is charge neutral (i.e., high density), above the critical density, the spin-spin correlations between neighboring electrons go through a smooth transition from antiferromagnetic to magnetic coupling as the electronic density is lowered.
URI: http://doi.org/10.1103/PhysRevB.93.045114
http://hdl.handle.net/11147/6134
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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