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Anomalous exchange interaction between intrinsic spins in conducting graphene systems

AutorSantos, H.; Soriano, David ; Palacios, J. J.
Fecha de publicación2014
EditorAmerican Physical Society
CitaciónPhysical Review B 89(15): 195416 (2014)
ResumenWe address the nature and possible observable consequences of singular one-electron states that appear when strong defects are introduced in the metallic family of graphene, namely, metallic carbon nanotubes and nanotori. In its simplest form, after creating two defects on the same sublattice, a state may emerge at the Fermi energy presenting very unusual properties: It is unique, normalizable, and features a wave function equally distributed around both defects. As a result, the exchange coupling between the magnetic moments generated by the two defects is anomalous. The intrinsic spins couple ferromagnetically, as expected, but do not present an antiferromagnetic excited state at any distance. We propose the use of metallic carbon nanotubes as an electronic device based on this anomalous coupling between spins which can be useful for the robust transmission of magnetic information at large distances. © 2014 American Physical Society.
DescripciónUnder the terms of the Creative Commons Attribution License 3.0 (CC-BY).
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.89.195416
Identificadoresdoi: 10.1103/PhysRevB.89.195416
issn: 1098-0121
e-issn: 1550-235X
Aparece en las colecciones: (CIN2) Artículos
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