High-pressure neutron and X-ray studies on the Mott transition of BaCoS2

M. Kanada, H. Harashina, H. Sasaki, K. Kodama, M. Sato, K. Kakurai, M. Nishi, E. Nishibori, M. Sakata, M. Takata, T. Adachi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

X-ray Rietveld analyses for BaCoS2 under high pressure and magnetic excitation measurements for BaCo1-xNixS2 at ambient pressure and for BaCoS2 under high pressure have been carried out. Atomic distances in a CoS5 pyramid abruptly change in the narrow region around the Mott metal-insulator transition with increasing external pressure (p). It suggests that the redistribution of electron numbers among the relevant bands occurs together with the p-induced Mott transition. The characteristic energy of the spin fluctuation behaves rather differently in two kinds of metallic phases induced by varying x and p, indicating that the main driving forces of the Mott transitions are different.

Original languageEnglish
Pages (from-to)1181-1183
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume60
Issue number8
DOIs
Publication statusPublished - 1999
Externally publishedYes
EventProceedings of the 1998 7th ISSP International Symposium Frontiers in Neutron Scattering Research (ISSP7) - Tokyo, Jpn
Duration: 1998 Nov 241998 Nov 27

ASJC Scopus subject areas

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

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