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Electronic Phase Separation in Manganite/Insulator Interfaces
Luis Brey
By using a realist microscopic model, we study the electric and magnetic properties of the interface between a half metallic manganite and an insulator. We find that the lack of ca…
Luttinger Liquid at the Edge of a Graphene Vacuum
H. A. Fertig, Luis Brey
We demonstrate that an undoped two-dimensional carbon plane (graphene) whose bulk is in the integer quantum Hall regime supports a non-chiral Luttinger liquid at an armchair edge.…
Mean field theory for double-perovskites
L. Brey, M. J. Calderon, S. Das Sarma +1
A mean field approximation of a model for double perovskites that takes into account the coupling between itinerant electron spins and localized spins is developed. As in previousl…
Electronic States of Graphene Nanoribbons
L. Brey, H. A. Fertig
We study the electronic states of narrow graphene ribbons (``nanoribbons'') with zigzag and armchair edges. The finite width of these systems breaks the spectrum into an infinite s…
Edge States and the Quantized Hall Effect in Graphene
Luis Brey, H. A. Fertig
We study edges states of graphene ribbons in the quantized Hall regime, and show that they can be described within a continuum model (the Dirac equation) when appropriate boundary…
Disorder-Induced First Order Transition and Curie Temperature Lowering in Ferromagnatic Manganites
J. Salafranca, L. Brey
We study the effect that size disorder in the cations surrounding manganese ions has on the magnetic properties of manganites. This disorder is mimic with a proper distribution of…