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Checkerboard order in the t--J model on the square lattice | | D. Poilblanc
; C. Weber
; F. Mila
; M. Sigrist
; PostScript
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; | | Date: |
9 May 2006 | | Subject: | Strongly Correlated Electrons | | Abstract: | We propose that the inhomogeneous patterns seen by STM in some underdoped superconducting cuprates could be related to a bond-order-wave instability of the staggered flux state, one of the most studied "normal" state proposed to compete with the d-wave RVB superconductor. A checkerboard pattern is obtained by a Gutzwiller renormalized mean-field theory of the t-J model for doping around 1/8. It is found that the charge modulation is always an order of magnitude smaller than the bond-order modulations. This is confirmed by an exact optimization of the wavefunction by a variational Monte Carlo scheme. The numerical estimates of the order parameters are however found to be strongly reduced w.r.t their mean-field values. | | Source: | arXiv, cond-mat/0605226 | | Services: | Forum | Review | PDF | Favorites | |
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