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Nanoscale Phase Separation in Colossal Magnetoresistance Materials: A Lesson for the Cuprates?
Elbio Dagotto, Jan Burgy, Adriana Moreo
A recent vast experimental and theoretical effort in manganites has shown that the colossal magnetoresistance effect can be understood based on the competition of charge-ordered an…
Indications of a Metallic Antiferromagnetic Phase in the 2 Dimensional Model
Daniel Duffy, Adriana Moreo
We present mean-field and quantum Monte Carlo results that suggest the existence of an itinerant antiferromagnetic ground state in the half-filled model in two dimensions.…
Influence of Hole Doping on Antiferromagnetic Real-Space Approaches for the High-Tc Cuprates
Alexander Nazarenko, Stephan Haas, Jose Riera +2
Recently proposed scenarios for the cuprates make extensive use of a ``flat'' quasiparticle (q.p.) dispersion and short-range hole-hole interactions in real-space, both caused by a…
Superconductivity in the Cuprates as a Consequence of Antiferromagnetism and a Large Hole Density of States
E. Dagotto, A. Nazarenko, A. Moreo +1
We briefly review a theory for the cuprates that has been recently proposed based on the movement and interaction of holes in antiferromagnetic (AF) backgrounds. A robust peak in t…
A Model of Correlated Fermions with Superconductivity
Alexander Nazarenko, Adriana Moreo, Jose Riera +1
Motivated by the phenomenology of the high-Tc cuprates, a two dimensional fermionic model with attractive interactions is here discussed. The exact solution to the two particle pro…
Spin Dynamics of Hole Doped
E. Dagotto, J. Riera, A. Sandvik +1
We propose an electronic model for the recently discovered hole doped compound . From a multiband Hamiltonian with oxygen and nickel orbitals, a one…