62 citations · 203 across the 9 of their papers we have counts for
9 papers
Dynamic RKKY interaction between magnetic moments in graphene nanoribbons
F. S. M. Guimarães, J. Duffy, A. T. Costa +2
Graphene has been identified as a promising material with numerous applications, particularly in spintronics. In this paper we investigate the peculiar features of spin excitations…
Dynamic RKKY interaction in graphene
S. R. Power, F. S. M. Guimaraes, A. T. Costa +2
The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the RKKY interaction in graphene, based on which the energetically favoura…
Graphene as a non-magnetic spin-current lens
F. S. M. Guimarães, A. T. Costa, R. B. Muniz +1
In spintronics, the ability to transport magnetic information often depends on the existence of a spin current traveling between two different magnetic objects acting as source and…
Entanglement of Two Impurities through Electron Scattering
A. T. Costa, S. Bose, Y. Omar
We study how two magnetic impurities embedded in a solid can be entangled by an injected electron scattering between them and by subsequent measurement of the electron's state. We…
Nonlinear phenomena in fluids with temperature-dependent viscosity: an hysteresis model for magma flow in conduits
Antonio Costa, Giovanni Macedonio
Magma viscosity is strongly temperature-dependent. When hot magma flows in a conduit, heat is lost through the walls and the temperature decreases along the flow causing a viscosit…
Spin filtering by ferromagnetic nanowires
A. T. Costa, R. B. Muniz
We show that electrical current flowing through nanowires made of ferromagnetic disordered alloys can become highly spin polarized.