Critical properties of the spin-1 Heisenberg chain with uniaxial anisotropy

Abstract

We use finite-size scaling to determine the critical properties of spin-1 chains with uniaxial single-ion anisotropy $D$. A phase diagram is obtained in the ($D$, $\Delta$) plane, where $\Delta$ is the strength of the interaction in the direction of the single-ion anisotropy. Critical exponents are estimated.