48 citations · 48 across the 2 of their papers we have counts for
4 papers
Double Exchange Model at Low Densities: Magnetic Polarons and Coulomb Suppressed Phase Separation
Vitor M. Pereira, J. M. B. Lopes dos Santos, Antonio H. Castro Neto
We consider the double exchange model at very low densities. The conditions for the formation of self-trapped magnetic polarons are analyzed using an independent polaron model. The…
Magnetic structure at zigzag edges of graphene bilayer ribbons
Eduardo V. Castro, N. M. R. Peres, J. M. B. Lopes dos Santos
We study the edge magnetization of bilayer graphene ribbons with zigzag edges. The presence of flat edge-state bands at the Fermi energy of undoped bilayer, which gives rise to a s…
The Double Exchange Model at Low Densities
Vitor M. Pereira, J. M. B. Lopes dos Santos, A. H. Castro Neto
We obtain the phase diagram of the double-exchange model at low electronic densities in the presence of electron-electron interactions. The single particle problem and its extensio…
Exact Solution of Ising Model on a Small-World Network
J. Viana Lopes, Yu. G. Pogorelov, J. M. B. Lopes dos Santos +1
We present an exact solution of a one-dimensional Ising chain with both nearest neighbor and random long-range interactions. Not surprisingly, the solution confirms the mean field…