Solitonic excitations in the Haldane phase of an S=1 chain

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Abstract

We study low-lying excitations in the 1D S=1 antiferromagnetic valence-bond-solid (VBS) model. In a numerical calculation on finite systems the lowest excitations are found to form a discrete triplet branch, separated from the higher-lying continuum. The dispersion of these triplet excitations can be satisfactorily reproduced by assuming approximate wavefunctions. These wavefunctions are shown to correspond to moving hidden domain walls, i.e. to one-soliton excitations.

Original languageEnglish
Article number009
Pages (from-to)8983-8998
Number of pages16
JournalJournal of Physics Condensed Matter
Volume5
Issue number48
DOIs
Publication statusPublished - 1993

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Wave functions
Domain walls
Solitons
excitation
atomic energy levels
domain wall
solitary waves
continuums
valence
Solid Bond

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Solitonic excitations in the Haldane phase of an S=1 chain. / Fáth, G.; Sólyom, J.

In: Journal of Physics Condensed Matter, Vol. 5, No. 48, 009, 1993, p. 8983-8998.

Research output: Contribution to journalArticle

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