output
20022011
most citedTheory of double-resonant Raman spectra in graphene: intensity and line shape of defect-induced and two-phonon bands

612 citations

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cond-mat.mtrl-sci2010★ 26 cited

Vortex and gap generation in gauge models of graphene

O. Oliveira, C. E. Cordeiro, A. Delfino +2

Effective quantum field theoretical continuum models for graphene are investigated. The models include a complex scalar field and a vector gauge field. Different gauge theories are…

cond-mat.mtrl-sci2010★ 17 cited

Dynamical gap generation in graphene nanoribbons: An effective relativistic field theoretical model

A. J. Chaves, G. D. Lima, W. de Paula +4

We show that the assumption of a nontrivial zero band gap for a graphene sheet within an effective relativistic field theoretical model description of interacting Dirac electrons o…

cond-mat.mtrl-sci2010★ 58 cited

Dynamical magnetic excitations of nanostructures from first-principles

S. Lounis, A. T. Costa, R. B. Muniz +1

Within time-dependent density functional theory, combined with the Korringa-Kohn-Rostoker Green functions, we devise a real space method to investigate spin dynamics. Our scheme en…

cond-mat.mtrl-sci2007★ 22 cited

Conduction band tight-binding description for silicon applied to phosphorous donors

A. S. Martins, Timothy B. Boykin, Gerhard Klimeck +1

A tight-binding parametrization for silicon, optimized to correctly reproduce effective masses as well as the reciprocal space positions of the conduction-band minima, is presented…

cond-mat.mtrl-sci2006

Hf defects in HfO2/Si

W. L. Scopel, Antonio J. R. da Silva, A. Fazzio

We investigate the possibility that Hf defects exist in the Si channel of HfO2 Si-based metal-oxide-semiconductor devices. We have studied, using ab initio Density Functional Theor…