The Fate of the Two-Magnon Bound State in the Heisenberg Antiferromagnet

Details The Fate of the Two-Magnon Bound State in the Heisenberg Antiferromagnet The Fate of the Two-Magnon Bound State in the Heisenberg Antiferromagnet

2009-04-27

arxiv.org/abs/0904.4085v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures, 1 table

Scientific paper

The energy spectrum of the two-magnon bound states in the Heisenberg-Ising
antiferromagnet on the square lattice are calculated using series expansion
methods. The results confirm an earlier spin-wave prediction of Oguchi and
Ishikawa, that the bound states vanish into the continuum before the isotropic
Heisenberg limit is reached.

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