Effect of Bound States on the Excitation Spectrum of a Heisenberg Ferromagnet at Low Temperature
- 3 July 1967
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 19 (1), 30-33
- https://doi.org/10.1103/physrevlett.19.30
Abstract
A compact expression for the energy shift and inverse lifetime (energy width) of spin waves in a Heisenberg ferromagnet at low temperatures is given. The two-particle bound states are observable via the resonance they cause in the self-energy of spin waves.Keywords
This publication has 6 references indexed in Scilit:
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