Abstract
We make a critical analysis of numerical results for and against phase separation and stripe formation in the model. We argue that the frustrated phase separation mechanism for stripe formation requires phase separation at too high a doping for it to be consistent with existing numerical studies of the model. We compare variational energies for various methods, and conclude that the most accurate calculations for large systems appear to be from the density-matrix renormalization group. These calculations imply that the ground state of the doped model is striped, not phase separated.
- Received 31 August 1999
DOI:https://doi.org/10.1103/PhysRevB.61.6320
©2000 American Physical Society