Non-uniform phases in metals with local moments

Details Non-uniform phases in metals with local moments Non-uniform phases in metals with local moments

2005-01-14

arxiv.org/abs/cond-mat/0501340v1

Phys. Rev. B 70, 214420 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 7 figures

Scientific paper

10.1103/PhysRevB.70.214420

The two-dimensional Kondo lattice model with both nearest and next-nearest neighbor exchange interactions is studied within a mean-field approach and its phase diagram is determined. In particular, we allow for lattice translation symmetry breaking. We observe that the usual uniform inter-site order parameter is never realized, being unstable towards other more complex types of order. When the nearest neighbor exchange J_1 is ferromagnetic the flux phase is always the most stable state, irrespective of the value of the next-nearest-neighbor interaction J_2. For antiferromagnetic J_1, however, either a columnar or a flux phase is realized, depending on conduction electron filling and the value of J_2.

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