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Spin dynamics of SrCuO and the Heisenberg ladder
A. W. Sandvik, E. Dagotto, D. J. Scalapino
The Heisenberg antiferromagnet in the ladder geometry is studied as a model for the spin degrees of freedom of SrCuO. The susceptibility and the spin echo decay rat…
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…
Heavy Quasiparticles in the Anderson Lattice Model
K. Tsutsui, Y. Ohta, R. Eder +3
An exact-diagonalization technique on small clusters is used to study the dynamics of the one-dimensional symmetric Anderson lattice model. Our calculated excitation spectra reprod…
Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
E. Dagotto, T. M. Rice
One way of making the transition between the quasi-long range order in a chain of S=1/2 spins coupled antiferromagnetically and the true long range order that occurs in a plane, is…
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…
Predictions for Neutron Scattering and Photoemission Experiments on CuGeO_3
Stephan Haas, Elbio Dagotto
Applying numerical techniques to a model recently proposed for the one dimensional spin-Peierls compound CuGeO_3, we calculate dynamical properties that can be directly compared wi…
Study of ARPES data and d-wave superconductivity using electronic models in two dimensions
A. Moreo, A. Nazarenko, S. Haas +2
We review the results of an extensive investigation of photoemission spectral weight using electronic models for the high-Tc superconductors. Here we show that some recently report…
Photoemission spectra of : a theoretical analysis
A. Nazarenko, K. J. E. Vos, S. Haas +2
Recent angle resolved photoemission (ARPES) results for the insulating cuprate have provided the first experimental data which can be directly compared to…