On the spectrum of singlet excitations of the S = 1 2 linear Heisenberg antiferromagnet

P. Fazekas, A. Sütö

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We note that available numerical data for the spectrum of small antiferromagnetic Heisenberg rings with nearest neighbour interaction, and S = 1 2 facilitate an extrapolation giving some idea of the form of the lower edge of the spectrum of singlet excitations for the infinite system. The result we obtain is radically different from the one given by Ovchinnikov in two respects: the singlet excitations are roughly equally distributed over the whole Brillouin zone, and the shape is better approximated by the formula valid for the triplet spectrum. A proof that there is a continuum of singlet excitations for every wave number is given.

Original languageEnglish
Pages (from-to)1045-1048
Number of pages4
JournalSolid State Communications
Volume19
Issue number11
DOIs
Publication statusPublished - Sep 1976

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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