The Spin-1 Heisenberg Antiferromagnet: New Results from Series Expansions

Details The Spin-1 Heisenberg Antiferromagnet: New Results from Series Expansions The Spin-1 Heisenberg Antiferromagnet: New Results from Series Expansions

2008-04-08

arxiv.org/abs/0804.1171v1

Physics

Condensed Matter

Other Condensed Matter

13 pages, 13 figures

Scientific paper

We calculate ground state properties (energy, magnetization, susceptibility) and one-particle spectra for the $S = 1$ Heisenberg antiferromagnet with easy-axis or easy-plane single site anisotropy, on the square lattice. Series expansions are used, in each of three phases of the system, to obtain systematic and accurate results. The location of the quantum phase transition in the easy-plane sector is determined. The results are compared with spin-wave theory.

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