期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.055501
关键词
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资金
- U. K. Engineering and Physical Sciences Research Council
- EU [228334 laserlabeurope]
- LENS under FICYT
- Spanish MALTA
- LLNL [DE-AC52-07NA27344]
- Engineering and Physical Sciences Research Council [EP/J003999/1] Funding Source: researchfish
- EPSRC [EP/J003999/1] Funding Source: UKRI
We report low-frequency high-resolution Raman spectroscopy and ab-initio calculations on dense lithium from 40 to 200 GPa at low temperatures. Our experimental results reveal rich first-order Raman activity in the metallic and semiconducting phases of lithium. The computed Raman frequencies are in excellent agreement with the measurements. Free energy calculations provide a quantitative description and physical explanation of the experimental phase diagram only when vibrational effect are correctly treated. The study underlines the importance of zero-point energy in determining the phase stability of compressed lithium.
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