Checkerboard order in the t--J model on the square lattice

TY - JOUR

T1 - Checkerboard order in the t--J model on the square lattice

AU - Poilblanc, D.

AU - Weber, C.

AU - Mila, F.

AU - Sigrist, M.

PY - 2007/3

Y1 - 2007/3

N2 - 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 View the MathML source. 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.

AB - 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 View the MathML source. 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.

M3 - Article

VL - 310

SP - 523

EP - 525

JO - JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

JF - JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

IS - 2

ER -