Doping dependence of the Neel temperature in Mott-Hubbard antiferromagnets: Effect of vortices
arXiv:cond-mat/9910194 · doi:10.1103/PhysRevLett.84.4994
Abstract
The rapid destruction of long-range antiferromagnetic order upon doping of Mott-Hubbard antiferromagnetic insulators is studied within a generalized Berezinskii-Kosterlitz-Thouless renormalization group theory in accordance with recent calculations suggesting that holes dress with vortices. We calculate the doping-dependent Neel temperature in good agreement with experiments for high-Tc cuprates. Interestingly, the critical doping where long-range order vanishes at zero temperature is predicted to be xc ~ 0.02, independently of any energy scales of the system.
4 pages with 3 figures included, minor revisions, to be published in PRL