34 citations · 108 across the 5 of their papers we have counts for
5 papers
Interaction between single vacancies in graphene sheet: An ab initio calculation
Wanderla L. Scopel, Wendel S. Paz, Jair C. C. Freitas
In order to investigate the interaction between single vacancies in a graphene sheet, we have used spin-polarized density functional theory (DFT). Two distinct configurations were…
Hyperfine magnetic field in ferromagnetic graphite
Jair C. C. Freitas, Wanderlã L. Scopel, Wendel S. Paz +7
Information on atomic-scale features is required for a better understanding of the mechanisms leading to magnetism in non-metallic, carbon-based materials. This work reports a dire…
On the connection between structural distortion and magnetism in graphene with a single vacancy
Wendel S. Paz, Wanderlã L. Scopel, Jair C. C. Freitas
The correlation between structural distortion and emergence of magnetism in graphene containing a single vacancy was investigated using first-principles calculations based on densi…
New considerations on the separability of very noisy mixed states and implications for NMR quantum computing
J. D. Bulnes, R. S. Sarthour, E. R. de Azevedo +5
We revise the problem first addressed by Braunstein and co-workers (Phys. Rev. Lett. {\bf 83} (5) (1999) 1054) concerning the separability of very noisy mixed states represented by…
Evidences for Tsallis non-extensivity on CMR manganites
M. S. Reis, J. C. C. Freitas, M. T. D. Orlando +2
We found, from the analysis of vs. curves of some manganese oxides (manganites), that these systems do not follow the traditional Maxwell-Boltzmann statistics, but the Tsal…