Spin gap and antiferromagnetic correlations in the Kondo insulator CeNiSn

T. E. Mason*, G. Aeppli, A. P. Ramirez, K. N. Clausen, C. Broholm, N. Sẗcheli, E. Bucher, T. T.M. Palstra

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

178 Citations (Scopus)
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Abstract

Neutron scattering measurements show that the crossover (at T10 K) from metallic heavy-fermion to semiconducting behavior coincides with the formation of a gap in the magnetic excitation spectrum of CeNiSn. In contrast to the simple band picture of an insulator, the gap is well defined only at particular values of the momentum transfer Q. While substantial antiferromagnetic correlations in the a-c plane characterize the low-T state, the corresponding zero-frequency response function is Q independent.

Original languageEnglish
Pages (from-to)490-493
Number of pages4
JournalPhysical review letters
Volume69
Issue number3
DOIs
Publication statusPublished - 1 Jan 1992
Externally publishedYes

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