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, 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 some experimental data and theoretical results obtained by other authors using different approaches.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, 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 some experimental data and theoretical results obtained by other authors using different approaches.

arXiv:cond-mat/0505458Physical Review BNov 22, 200514 citations

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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, 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 some experimental data and theoretical results obtained by other authors using different approaches.