Abstract
The 2D half-filled Kondo lattice model with exchange and nearest neighbor hopping is considered. It is shown that this model belongs to a class of Hamiltonians for which zero-temperature auxiliary field Monte Carlo methods may be efficiently applied. We compute the staggered moment and spin and quasiparticle gaps on lattice sizes up to . The competition between the RKKY interaction and Kondo effect leads to a continuous quantum phase transition between antiferromagnetic and spin-gapped insulators. This transition occurs at .
- Received 13 April 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.796
©1999 American Physical Society