Spin Dynamics in the Two-Dimensional Spin 1/2 Heisenberg Antiferromagnet

Details Spin Dynamics in the Two-Dimensional Spin 1/2 Heisenberg Antiferromagnet Spin Dynamics in the Two-Dimensional Spin 1/2 Heisenberg Antiferromagnet

2005-05-18

arxiv.org/abs/cond-mat/0505458v1

Phys. Rev. B 72, 174423 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages, 5 figures and 1 table

Scientific paper

10.1103/PhysRevB.72.174423

We present low-temperature dynamic properties of the quantum two-dimensional antiferromagnetic Heisenberg model with spin S=1/2. The calculation of the dynamic correlation function is performed by combining a projection operator formalism and the modified spin-wave theory (MSW), which gives a gap in the dispersion relation for finite temperatures. The so calculated dynamic correlation function shows a double peak structure.We also obtain the spin-wave damping and compare our results to experimental data and to theoretical results obtained by other authors using different approaches.

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