In-Plane Edge Magnetism in Graphene-Like Nanoribbons |
| S. Krompiewskia and G. Cuniberti b
aInstitute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland bTU Dresden, 01062 Dresden, Germany: Institute for Materials Science and Max Bergmann Center of Biomaterials;, Center for Advancing Electronics Dresden; and Dresden Center for Computational Materials Science (DCMS) |
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| This paper is devoted to identification of the most important factors responsible for formation of magnetic moments at edges of graphene-like nanoribbons. The main role is attributed to the Hubbard correlations (within unrestricted Hartree-Fock approximation) and intrinsic spin-orbit interactions, but additionally a perpendicular electric field is also taken into account. Of particular interest is the interplay of the in-plane edge magnetism and the energy band gap. It is shown that, with the increasing electric field, typically the following phases develop: magnetic insulator (with in-plane spins), nonmagnetic narrow-band semiconductor, and nonmagnetic band insulator. |
DOI: 10.12693/APhysPolA.131.828 PACS numbers: 75.75.-c, 75.30.Gw, 61.48.Gh |