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- W2078657393 abstract "This paper presents a detailed Raman scattering study of the unusually broad ${E}_{2g}$ phonon mode in ${mathrm{MgB}}_{2}$ crystal. It is shown by polarized Raman scattering on a few-micron-size crystallites with natural faces that the observed broad Raman feature really does obey the selection rules of an ${E}_{2g}$ mode. Raman spectra on high quality polycrystalline superconducting ${mathrm{MgB}}_{2}$ wires reveal a very symmetric ${E}_{2g}$ phonon line near $615 {mathrm{cm}}^{ensuremath{-}1}$ with the room temperature linewidth of $260 {mathrm{cm}}^{ensuremath{-}1}$ only. Additional scattering of different polarization dependence, observed in certain crystallites, is interpreted as weighted phonon density of states induced by lattice imperfections." @default.
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- W2078657393 date "2001-09-01" @default.
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- W2078657393 title "Phonons in MgB2 by polarized Raman scattering on single crystals" @default.
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- W2078657393 doi "https://doi.org/10.1103/physrevb.64.140503" @default.
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