Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2000-04-17
Physics
Condensed Matter
Strongly Correlated Electrons
12 pages (RevTeX), 12 figures (EPS)
Scientific paper
10.1103/PhysRevB.63.144423
Using the Density Matrix Renormalization Group, we study metallic ferromagnetism in a one-dimensional copper-oxide model which contains one oxygen p-orbital and one copper d-orbital. The parameters for the d-p model can be chosen so that it is similar to the one-dimensional periodic Anderson model. For these parameters, we compare the ground-state phase diagram with that of the Anderson model and find a ferromagnetic region analogous to one found in the Anderson model, but which is pushed to somewhat higher densities and interaction strengths. In both models, we find a region within the ferromagnetic phase in which phase separation between a localized ferromagnetic domain and a weakly antiferromagnetic regime occurs. We then choose a set of parameter values appropriate for copper-oxide materials and explore the ground-state phase diagram as a function of the oxygen-oxygen hopping strength and the electron density. We find three disconnected regions of metallic ferromagnetism and give physical pictures of the three different mechanisms for ferromagnetism in these phases.
Guerrero Martín
Noack Reinhard M.
No associations
LandOfFree
Ferromagnetism and phase separation in one-dimensional d-p and periodic Anderson models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ferromagnetism and phase separation in one-dimensional d-p and periodic Anderson models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ferromagnetism and phase separation in one-dimensional d-p and periodic Anderson models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-589483