状态方程
压缩性
材料科学
铋
热力学
压力(语言学)
压缩(物理)
相(物质)
霓虹灯
钻石
金刚石顶砧
凝聚态物理
工作(物理)
高压
物理
原子物理学
复合材料
冶金
哲学
氩
量子力学
语言学
作者
Daniel Campbell,Daniel T. Sneed,E. F. O’Bannon,Per Söderlind,Zsolt Jenei
出处
期刊:Physical review
日期:2023-06-15
卷期号:107 (22)
被引量:1
标识
DOI:10.1103/physrevb.107.224104
摘要
At room temperature, bismuth undergoes several structural transitions with increasing pressure before taking on a body-centered cubic (bcc) phase at approximately 8 GPa. The bcc structure is stable to the highest measured pressure and its simplicity, along with its high compressibility and atomic number, make it an enticing choice as a pressure calibrant. We present three data sets on the compression of bismuth in a diamond anvil cell in a neon pressure medium, up to a maximum pressure of about 260 GPa. The use of a soft pressure medium reduces deviatoric stress when compared to previous work. With an expanded pressure range, higher point density, and a decreased uniaxial stress component, we are able to provide more reliable equation of state (EOS) parameters. We also conduct density functional theory (DFT) electronic-structure calculations that confirm the stability of the bcc phase at high pressure.
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