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

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2 Citations (Scopus)


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
Issue number8
Publication statusPublished - 1999
EventProceedings of the 1998 7th ISSP International Symposium Frontiers in Neutron Scattering Research (ISSP7) - Tokyo, Jpn
Duration: 1998 Nov 241998 Nov 27


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