Exact stripe, checkerboard, and droplet ground states in two dimensions

Details Exact stripe, checkerboard, and droplet ground states in two dimensions Exact stripe, checkerboard, and droplet ground states in two dimensions

2006-02-20

arxiv.org/abs/cond-mat/0602456v1

Phys. Rev. B73, 014524 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 8 figures

Scientific paper

10.1103/PhysRevB.73.014524

Exact static nondegenerate stripe and checkerboard ground states are obtained in a two-dimensional generalized periodic Anderson model, for a broad concentration range below quarter filling. The random droplet states, also present in the degenerate ground state, are eliminated by extending the Hamiltonian with terms of different physical origin such as dimerization, periodic charge displacements, density waves, or distorsion lines.

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