Abstract:
It is shown that the spectrum of spin-wave excitations in a Heisenberg antiferromagnet can be described consistently in the framework of the method of irreducible Green's functions. The anomalous contributions to the renormalization of the mean field are taken into account from the very beginning. The spin wave damping is calculated self-consistently.
Citation:
A. L. Kuzemsky, D. Marvakov, “Excitation spectrum of Heisenberg antiferromagnet at finite temperatures”, TMF, 83:1 (1990), 147–157; Theoret. and Math. Phys., 83:1 (1990), 441–448
This publication is cited in the following 3 articles:
A. L. Kuzemsky, “Variational principle of Bogoliubov and generalized mean fields in many-particle interacting systems”, Int. J. Mod. Phys. B, 29:18 (2015), 1530010
Kuzemsky A.L., “Bogoliubov's Vision: Quasiaverages and Broken Symmetry to Quantum Protectorate and Emergence”, International Journal of Modern Physics B, 24:8 (2010), 835–935
Kuzemsky A.L., “Quasiaverages, symmetry breaking and irreducible Green functions method”, Condensed Matter Physics, 13:4 (2010), 43001