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Checkerboard and stripe inhomogeneities in cuprates | | G. Seibold
; J. Lorenzana
; M. Grilli
; | | Date: |
31 May 2006 | | Subject: | Strongly Correlated Electrons; Superconductivity | | Abstract: | We systematically investigate charge-ordering phases by means of a restricted and unrestricted Gutzwiller approximation to the single-band Hubbard model with nearest ($t$) and next-nearest neighbor hopping ($t’$). When $ t’/t $ is small, as appropriate for ${
m La_{2-x}Sr_xCuO_4}$, stripes are found, whereas in compounds with larger $ t’/t $ (such as ${
m Ca_{2-x}Na_x CuO_2Cl_2}$ and ${
m Bi_2Sr_2CaCu_2O_{8+delta}}$) checkerboard structures are favored. In contrast to the linear doping dependence found for stripes the charge periodicity of checkerboard textures is locked to 4 unit cells over a wide doping range. In addition we find that checkerboard structures are favored at surfaces. | | Source: | arXiv, cond-mat/0606010 | | Services: | Forum | Review | PDF | Favorites | |
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