Role of single-ion excitations in the mixed-spin quasi-one-dimensional quantum antiferromagnet Nd2BaNiO5

A. Zheludev, S. Maslov, T. Yokoo, Jun Akimitsu, S. Raymond, S. E. Nagler, K. Hirota

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Inelastic neutron scattering experiments on Nd2BaNiO5 single crystals and powder samples are used to study the dynamic coupling of one-dimensional Haldane-gap excitations in the S=1 Ni2+-chains to local crystal-field transitions, associated with the rare earth ions. Substantial interference between the two types of excitations is observed even in the one-dimensional paramagnetic phase. Despite that, the results provide solid justification for the previously proposed "static staggered field" model for R2BaNiO5 nickelates. The observed behavior is qualitatively explained by a simple chain-random-phase-approximation model.

Original languageEnglish
Pages (from-to)11601-11612
Number of pages12
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number17
Publication statusPublished - 2000
Externally publishedYes

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Ions
Inelastic neutron scattering
Powders
Rare earths
excitation
crystal field theory
ions
inelastic scattering
neutron scattering
rare earth elements
Single crystals
interference
Crystals
single crystals
approximation
Experiments

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Role of single-ion excitations in the mixed-spin quasi-one-dimensional quantum antiferromagnet Nd2BaNiO5 . / Zheludev, A.; Maslov, S.; Yokoo, T.; Akimitsu, Jun; Raymond, S.; Nagler, S. E.; Hirota, K.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 61, No. 17, 2000, p. 11601-11612.

Research output: Contribution to journalArticle

Zheludev, A. ; Maslov, S. ; Yokoo, T. ; Akimitsu, Jun ; Raymond, S. ; Nagler, S. E. ; Hirota, K. / Role of single-ion excitations in the mixed-spin quasi-one-dimensional quantum antiferromagnet Nd2BaNiO5 . In: Physical Review B - Condensed Matter and Materials Physics. 2000 ; Vol. 61, No. 17. pp. 11601-11612.
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AU - Nagler, S. E.

AU - Hirota, K.

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