2001/12/20 by A. F. Goncharov, Alexander F. Goncharov, Eugene Gregoryanz +14
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Energetic Materials and Combustion #FOS: Physical sciences #High-pressure geophysics and materials #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0112404
18 pages, 10 figures, 2 tables, Proceedings of the International School of Physics "Enrico Fermi", Volume CXLVII, "High-Pressure Phenomena", edited by R. J. Hemley, M. Bernasconi, L. Ulivi and G. Chiarotti, in press
arxiv created 2001/12/20 · openalex publication_date 2001/12/20 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We review recent development in Raman techniques and diamond anvil cell technology, that allow measurements of Raman of metals in the megabar pressure range. The Raman technique includes holographic transmission optics and single-stage spectrographs with CCD array detectors. Use of synthetic high-purity diamonds and anglular excitation geometry reduces spurious background scattering substantially, which makes observable very weak Raman peaks in metals. We give several examples of studies including the hexagonal close packed (hcp) ε-Fe, Fe(1-x)Nix, and Re and the recently discovered high-temperature superconductor MgB2. The shift of phonon modes with pressure is used for determination of the mode-Grüneisen parameters, estimation of shear elastic moduli and provide information on structural and electronic transitions.