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Role of strong correlation in the recent ARPES experiments for cuprate superconductors
S. Yunoki, E. Dagotto, S. Sorella
Motivated by recent photoemission experiments on cuprates, the low-lying excitations of a strongly correlated superconducting state are studied numerically. It is observed that alo…
Phase Diagram of the Two-Leg Kondo Ladder
J. C. Xavier, E. Miranda, E. Dagotto
The phase diagram of the two-leg Kondo ladder is investigated using computational techniques. Ferromagnetism is present, but only at small conduction electron densities and robust…
Interference Effects in the Conductance of Multi-Level Quantum Dots
C. A. Büsser, G. B. Martins, K. A. Al-Hassanieh +2
Using exact-diagonalization techniques supplemented by a Dyson equation embedding procedure, the transport properties of multilevel quantum dots are investigated in the Kondo regim…
Insulator to Metal Transition Induced by Disorder in a Model for Manganites
C. Sen, G. Alvarez, E. Dagotto
The physics of manganites appears to be dominated by phase competition among ferromagnetic metallic and charge-ordered antiferromagnetic insulating states. Previous investigations…
Orbital Ordering, New Phases, and Stripe Formation in Doped Layered Nickelates
Takashi Hotta, Elbio Dagotto
Ground-state properties of layered nickelates are investigated based on the orbital-degenerate Hubbard model coupled with lattice distortions, by using umerical techniques. The Née…
Superconducting Puddles and "Colossal'' Effects in Underdoped Cuprates
G. Alvarez, M. Mayr, A. Moreo +1
Phenomenological models for the antiferromagnetic (AF) vs. d-wave superconductivity competition in cuprates are studied using conventional Monte Carlo techniques. The analysis sugg…