Phase separation and stripe formation in the 2D t-J model: a comparison of numerical results

Details Phase separation and stripe formation in the 2D t-J model: a comparison of numerical results Phase separation and stripe formation in the 2D t-J model: a comparison of numerical results

1999-07-24

arxiv.org/abs/cond-mat/9907375v2

Physics

Condensed Matter

Strongly Correlated Electrons

This version includes a revised, more careful comparison of numerical results between DMRG and Green's function Monte Carlo. I

Scientific paper

10.1103/PhysRevB.61.6320

We make a critical analysis of numerical results for and against phase separation and stripe formation in the t-J 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 t-J 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 t-J model is striped, not phase separated.

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