高圧力の科学と技術
Online ISSN : 1348-1940
Print ISSN : 0917-639X
24 巻 , 2 号
選択された号の論文の11件中1~11を表示しています
巻頭言
特集:地球深部の動的物性と物質輸送
受賞記念解説:高圧力学会奨励賞
  • 石河 孝洋
    2014 年 24 巻 2 号 p. 145-154
    発行日: 2014年
    公開日: 2014/06/07
    ジャーナル フリー
    Physical properties at ambient condition are only a small fraction of the real figure of materials, and their hidden properties are revealed by pressurization. I and collaborators have studied on physical properties of elements under high pressure using first-principles calculations based on the density functional theory. In this article, I briefly introduce our previous and current works on pressure-induced structural and superconducting transitions in hydrogen, calcium, yttrium, iron, copper, gold, carbon, phosphorus, oxygen, iodine, and argon.
  • 佐藤 友子
    2014 年 24 巻 2 号 p. 155-161
    発行日: 2014年
    公開日: 2014/06/07
    ジャーナル フリー
    The high-pressure behavior of SiO2 glass has attracted considerable attention because of its importance not only in condensed-matter physics and materials science but also in geophysics. We have conducted X-ray absorption/diffraction measurements and optical-microscope observation to understand the behavior of SiO2 glass under hydrostatic and uniaxial compression. SiO2 glass undergoes pressure-induced structural transformations first in the intermediate-range order (the network structure consisting of SiO4 tetrahedra) and then in the short-range order (the coordination number). Under uniaxial compression, the atomic arrangement in intermediate-range order deforms largely and a large differential strain remains after decompression. This article attempts to review these interesting behaviors, mainly based on our recent researches.
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