Polarized-neutron study of longitudinal haldane-gap excitations in Nd2BaNiO5

S. Raymond, T. Yokoo, A. Zheludev, S. E. Nagler, A. Wildes, J. Akimitsu

研究成果査読

45 被引用数 (Scopus)

抄録

Polarized and unpolarized inelastic neutron scattering is used to study Haldane-gap excitations in the mixed-spin linear-chain antiferromagnet Nd2BaNiO5. The longitudinal mode, polarized along the direction of ordered moments, is observed for the first time. The model of isolated Haldane chains in a static staggered exchange field, that is known to work very well for static properties and transverse spin excitations in R2BaNiO5 compounds, fails to explain new results for the longitudinal spin gap.

本文言語English
ページ(範囲)2382-2385
ページ数4
ジャーナルPhysical Review Letters
82
11
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学一般

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