Influence of anisotropic next-nearest-neighbor hopping on diagonal charge-striped phases

Details Influence of anisotropic next-nearest-neighbor hopping on diagonal charge-striped phases Influence of anisotropic next-nearest-neighbor hopping on diagonal charge-striped phases

2005-11-22

arxiv.org/abs/cond-mat/0511557v1

J. Phys. A: Math. Gen. 39, 11145 - 11153 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 3 figures, 1 table

Scientific paper

10.1088/0305-4470/39/36/002

We consider the model of strongly-correlated system of electrons described by an extended Falicov-Kimball Hamiltonian where the stability of some axial and diagonal striped phases was proved. Introducing a next-nearest-neighbor hopping, small enough not to destroy the striped structure, we examine rigorously how the presence of the next-nearest-neighbor hopping anisotropy reduces the $\pi/2$-rotation degeneracy of the diagonal-striped phase. The effect appears to be similar to that in the case of anisotropy of the nearest-neighbor hopping: the stripes are oriented in the direction of the weaker next-nearest-neighbor hopping.

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