Date of this Version
Physical Review Letters
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.
Silberglitt, R., & Harris, A. (1967). Effect of Bound States on the Excitation Spectrum of a Heisenberg Ferromagnet at Low Temperature. Physical Review Letters, 19 (1), 30-33. http://dx.doi.org/10.1103/PhysRevLett.19.30
Date Posted: 12 August 2015
This document has been peer reviewed.