Two-magnon bound state in fcc ferromagnets

Michael Thorpe

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We show that an optically active two-magnon bound state exists for fcc Heisenberg ferromagnets. There is a repulsive interaction between magnons with equal and opposite wave vectors near the zone edge which in most lattices does not lead to any dramatic effects. However, in the fcc lattice there is a logarithmic divergence in the density of states at the zone boundary, which causes a bound state to split off from above the band. We discuss the possibility of observing such a state experimentally by Raman scattering, possibly in EuO.

Original languageEnglish (US)
Pages (from-to)1608-1613
Number of pages6
JournalPhysical Review B
Volume4
Issue number5
DOIs
StatePublished - 1971
Externally publishedYes

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Raman scattering
magnons
divergence
Raman spectra
causes
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Two-magnon bound state in fcc ferromagnets. / Thorpe, Michael.

In: Physical Review B, Vol. 4, No. 5, 1971, p. 1608-1613.

Research output: Contribution to journalArticle

Thorpe, Michael. / Two-magnon bound state in fcc ferromagnets. In: Physical Review B. 1971 ; Vol. 4, No. 5. pp. 1608-1613.
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