Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice

Details Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice

2008-07-11

arxiv.org/abs/0807.1837v2

Phys. Rev. B 78, 180413(R) 2008

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures

Scientific paper

10.1103/PhysRevB.78.180413

We find evidence for decaying magnons at strong magnetic field in the square
lattice spin-1/2 Heisenberg antiferromagnet. The results are obtained using
Quantum Monte Carlo simulations combined with a Bayesian inference technique to
obtain dynamics and are consistent with predictions from spin wave theory.

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