赝势
简并能级
声子
凝聚态物理
材料科学
格子(音乐)
锂(药物)
相(物质)
物理
原子物理学
分子物理学
量子力学
声学
医学
内分泌学
作者
Y. R. Wang,A. W. Overhauser
出处
期刊:Physical review
日期:1986-12-15
卷期号:34 (12): 8401-8405
被引量:8
标识
DOI:10.1103/physrevb.34.8401
摘要
Below a temperature of 80 K, lithium transforms from its room-temperature bcc structure to a close-packed rhombohedral phase (9R) having three atoms per primitive unit cell. The phonon spectrum of the 9R phase is calculated from a pseudopotential model that fits the experimental bcc phonon spectrum. The predicted zone-center optical modes are a doubly degenerate LO mode at 7.9 THz and a fourfold-degenerate TO mode at 3.4 THz.
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