Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5347
Title: Electron-electron interactions and topology in the electronic properties of gated graphene nanoribbon rings in Möbius and cylindrical configurations
Authors: Güçlü, Alev Devrim
Grabowski, Marek
Hawrylak, Pawel
Keywords: Graphene
Electronic structure of graphene
Möbius
Cylindrical configurations
Cylindrical rings
Publisher: American Physical Society
Source: Güçlü, A.D., Grabowski, M., and Hawrylak, P. (2013). Electron-electron interactions and topology in the electronic properties of gated graphene nanoribbon rings in Möbius and cylindrical configurations. Physical Review B - Condensed Matter and Materials Physics, 87(3). doi:10.1103/PhysRevB.87.035435
Abstract: 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.
URI: https://doi.org/10.1103/PhysRevB.87.035435
http://hdl.handle.net/11147/5347
ISSN: 1098-0121
1098-0121
1550-235X
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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