Phys. Rev. Lett. 77, 3665–3668 (1996)Inelastic X-Ray Scattering Study of Solid and Liquid Li and NaReceived 27 February 1996; published in the issue dated 21 October 1996 We present the first measurements of the dynamic structure factor of lithium and sodium in the liquid and solid phases, in the intermediate- q regime. The overall shape of the response function is little changed on melting, implying that it is not determined by the long range order of the ion cores. Conversely, fine structure, observed in the Li data, disappears on melting, and is attributed to band-structure-induced transitions. At small q, the plasmon lifetime and dispersion remain unchanged on melting. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.3665
DOI:
10.1103/PhysRevLett.77.3665
PACS:
78.70.Ck, 71.45.Gm
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