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Lattice Dynamics of Dense Lithium

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Original languageEnglish
Article number055501
Number of pages5
JournalPhysical Review Letters
Volume108
Issue number5
DOIs
StatePublished - 30 Jan 2012

Abstract

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.

    Research areas

  • PRESSURE, GPA, SUPERCONDUCTIVITY, PSEUDOPOTENTIALS, TRANSITION, SODIUM

ID: 3318720