Neutron diffraction of liquid arsenic-tellurium mixtures near the semiconductor-metal transition

K. Maruyama*, H. Hoshino, H. Ikemoto, T. Miyanaga, H. Endo

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

5 被引用数 (Scopus)

抄録

Neutron scattering measurements have been carried out for liquid As-Te mixtures containing 10, 20 and 30 at.% As in the temperature range between 400 and 600 °C. The local structure was analyzed by combining the information available from our previous EXAFS results. The partial coordination number for As-Te, nAs-Te, for the mixture containing 20 at.% As decreases from 3.0-2.5 at 400 °C to 2.0-1.7 at 600 °C, suggesting that a 'network-chain' structural transformation occurs on the semiconductor to metal transition at high temperature. We propose that the first sharp diffraction peak observed around 1.4 Å-1 in S(Q) indicates the presence of small chain clusters. It is found that the position of the second peak of g(r) shifts to smaller r at high temperature, which leads to volume contraction.

本文言語英語
ページ(範囲)356-360
ページ数5
ジャーナルJournal of Non-Crystalline Solids
312-314
DOI
出版ステータス出版済み - 2002/10

ASJC Scopus 主題領域

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 凝縮系物理学
  • 材料化学

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