Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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Author: search.filters.author.Hawrylak, PawelSubject: search.filters.subject.Cylindrical configurations

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  • Article
    Citation - WoS: 26
    Citation - Scopus: 27
    Electron-Electron Interactions and Topology in the Electronic Properties of Gated Graphene Nanoribbon Rings in Möbius and Cylindrical Configurations
    (American Physical Society, 2013) Güçlü, Alev Devrim; Grabowski, Marek; Hawrylak, Pawel
    We present a theory of the electronic properties of gated graphene nanoribbon rings with zigzag edges in Möbius and cylindrical configurations. The finite width opens a gap and nontrivial topology of the Möbius ring leads to a single edge with edge states with an induced, effective gauge field, in analogy to topological insulators. The single zigzag edge leads to a shell of degenerate states at the Fermi level and a ferromagnetic (FM) ground state at half-filling, i.e., at charge neutrality, due to electron-electron interactions. For fractional fillings, both the magnetic moment and the energy gap are found to oscillate as a function of the shell filling. In cylindrical rings, the two edges lead to AF ground state at half-filling but FM ground state at fractional fillings.