Magnetic properties of hydrogenated bilayer graphene flakes

The influence of the localized states generated by the H-vacancy defects and induced on the same side of the system, on the magnetic properties of the bilayer graphane flakes has been investigated using the quantum chemistry methods. We find that ferromagnetic ordering of spins of the localized stat...

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Bibliographic Details
Published inEurophysics letters Vol. 93; no. 4; p. 47007
Main Authors Berashevich, J, Chakraborty, T
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.02.2011
EPS, SIF, EDP Sciences and IOP Publishing
Subjects
73.20.Fz
73.22.-f
75.75.-c
Density
Ferromagnetism
Flakes (defects)
Graphene
Interference
Magnetic properties
Quantum chemistry
Stability
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Summary:The influence of the localized states generated by the H-vacancy defects and induced on the same side of the system, on the magnetic properties of the bilayer graphane flakes has been investigated using the quantum chemistry methods. We find that ferromagnetic ordering of spins of the localized states is destabilized by the addition of a second layer of graphane. This is due to leaking of the spin density of the localized states to the second layer that suppresses the interference of their spin density in the first layer where the states are generated. Moreover, the location of the localized states relating to the zigzag edges is found to be absolutely crucial in defining the stability of the alignment of their spins. For the states placed at the zigzag edges the stability is found to be large enough to produce stable ferromagnetism in bilayer systems.
Bibliography:istex:E237A13898EFA46FDD2FDA2A810D230FCCA4EB82
ark:/67375/80W-KH63SPG6-F
publisher-ID:epl13319
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/93/47007