http://www.cnr.it/ontology/cnr/individuo/prodotto/ID273298
Spin coupling around a carbon atom vacancy in graphene (Articolo in rivista)
- Type
- Label
- Spin coupling around a carbon atom vacancy in graphene (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevB.88.195424 (literal)
- Alternative label
M. Casartelli
S. Casolo
G. F. Tantardini
R. Martinazzo (2013)
Spin coupling around a carbon atom vacancy in graphene
in Physical review. B, Condensed matter and materials physics (Online); The American Physical Society, College Park, MD 20740-3844 (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- M. Casartelli
S. Casolo
G. F. Tantardini
R. Martinazzo (literal)
- Pagina inizio
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- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Dipartimento di Chimica, Università degli Studi di Milano
Dipartimento di Chimica, Università degli Studi di Milano
Dipartimento di Chimica, Università degli Studi di Milano e CNR-ISTM, Milan, Italy
Dipartimento di Chimica, Università degli Studi di Milano e CNR-ISTM, Milan, Italy (literal)
- Titolo
- Spin coupling around a carbon atom vacancy in graphene (literal)
- Abstract
- We investigate the details of the electronic structure in the neighborhoods of a carbon atom vacancy in
graphene by employing magnetization-constrained density-functional theory on periodic slabs, and spin-exact,
multireference, second-order perturbation theory on a finite cluster. The picture that emerges is that of two local
magnetic moments (one ? -like and one ? -like) decoupled from the ? band and coupled to each other. We find
that the ground state is a triplet with a planar equilibrium geometry where an apical C atom opposes a pentagonal
ring. This state lies ~0.2 eV lower in energy than the open-shell singlet with one spin flipped, which is a bistable
system with two equivalent equilibrium lattice configurations (for the apical C atom above or below the lattice
plane) and a barrier ~0.1 eV high separating them. Accordingly, a bare carbon atom vacancy is predicted to be
paramagnetism can be accommodated if binding to foreign species,
a spin-1 paramagnetic species, but spin-1/2 ripples, coupling to a substrate, or doping are taken into account. (literal)
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- Autore CNR
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