Theory of short-range magnetic order for the t-J model
Abstract
We present a self-consistent theory of magnetic short-range order based on a spin-rotation-invariant slave-boson representation of the 2D t-J model. In the functional-integral scheme, at the nearest-neighbour pair-approximation level, the bosonized t-J Lagrangian is transformed to a classical Heisenberg model with an effective (doping-dependent) exchange interaction which takes into account the interrelation of ``itinerant'' and ``localized'' magnetic behaviour. Evaluating the theory in the saddle-point approximation, we find a suppression of antiferromagnetic and incommensurate spiral long-range-ordered phases in the favour of a paramagnetic phase with pronounced antiferromagnetic short-range correlations.
Keywords
Cite
@article{arxiv.cond-mat/9606171,
title = {Theory of short-range magnetic order for the t-J model},
author = {C. Schindelin and U. Trapper and H. Fehske and H. B"uttner},
journal= {arXiv preprint arXiv:cond-mat/9606171},
year = {2009}
}
Comments
2 pages, 1 Postscript figure, LTpaper.sty, Proc. XXI Int. Conf. on Low Temp. Phys. Prague 96