Band structure of charge-ordered doped antiferromagnets
نویسندگان
چکیده
منابع مشابه
Universal charge and spin response in optimally doped antiferromagnets.
Charge and spin response in the planar t − J model at finite temperatures are investigated numerically, in the regime corresponding to cuprates at intermediate doping. We show that the local spin correlation function is T-independent, leading to χ ′′ (ω < J) ∝ tanh(ω/2T). The current correlation function C(ω) appears to be T-as well as ω-independent, and the optical conductivity σ ∝ (1 − e −ω/T...
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Finite-temperature diamagnetic properties of doped antiferromagnets as modeled by the two-dimensional t-J model were investigated by numerical studies of small model systems. Two numerical methods were used: the worldline quantum Monte Carlo method with a loop cluster algorithm (QMC) and the finite-temperature Lanczos method (FTLM), yielding consistent results. The diamagnetic susceptibility in...
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We study charge ordered d-wave resonating valence bond states sdRVBd in the doped cuprates, and estimate the energies of these states in a generalized t-J model by using a renormalized mean-field theory. The longrange Coulomb potential tends to modulate the charge density in favor of the charge ordered RVB state. The possible relevance to the recently observed 434 checkerboard patterns in tunne...
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We study the spin excitations and the transverse susceptibility of a two-dimensional antiferromagnet doped with a small concentration of holes in the t-J model. The motion of holes generates a renormalization of the magnetic properties. The Green ́s functions are calculated in the selfconsistent Born approximation. It is shown that the long-wavelength spin waves are significantly softened and th...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2004
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.69.214433