Missing atom as a source of carbon magnetism.
By I. Brihuega. Physical Review Letters, 2010
676 citations recorded by the source corpus.
Atomic vacancies have a strong impact in the mechanical, electronic, and magnetic properties of graphenelike materials. By artificially generating isolated vacancies on a graphite surface and measuring their local density of states on the atomic scale, we have shown how single vacancies modify the electronic properties of this graphenelike system. Our scanning tunneling microscopy experiments, complemented by tight-binding calculations, reveal the presence of a sharp electronic resonance at the Fermi energy around each single graphite vacancy, which can be associated with the formation of local magnetic moments and implies a dramatic reduction of the charge carriers' mobility. While vacancies in single layer graphene lead to magnetic couplings of arbitrary sign, our results show the possibility of inducing a macroscopic ferrimagnetic state in multilayered graphene just by randomly removing single C atoms.
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/b33da03ab0ae8b9a3950d412548eb19f18748897
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In Materials Chemistry
- A. Krasheninnikov
- F. Banhart
- A.K. Geim
- J. Kotakoski
- N. M. R. Peres
- M. Fuhrer
- I. V. Grigorieva
- R. Nair
Citations in the corpus
- Spin-half paramagnetism in graphene induced by point defects (2011, background): “Let us also mention the observation of a peak in the tunnelling density of states near vacancies, even though that work was carried out for graphit”
- Tunable Kondo effect in graphene with defects (2010, background): “Nonetheless, magnetism in graphitic carbon in the absence of transition-metal elements has been reporte”
- Structural defects in graphene. (2011, background): “Single vacancies (SV) in graphene (or in the outermost layer of graphite) have been experimentally observed by TEM(13,14) and STM.(17) As can be seen in Figure 2, the SV undergoes a Jahn Teller distortion which leads to the saturation of two of the three dangling bonds toward the missing atom.”