Journal
PHYSICAL REVIEW B
Volume 62, Issue 5, Pages 3006-3009Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.62.3006
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A Green's function formalism for calculating spin-wave excitations is developed for practical calculations and tested for real solids. The mapping to the Heisenberg Hamiltonian commonly used in spin-wave calculations is avoided, making the formalism suitable for both localized and itinerant magnetic systems. To test. the formalism, we have calculated the spin-wave spectra and dispersions of ferromagnetic Fe and Ni. The results prove to be in very good agreement with experiment and some novel features are predicted.
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