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- W1969295752 abstract "The effects of spontaneous ${mathrm{CuPt}}_{B}$ ordering on the lattice dynamics of ${mathrm{GaInP}}_{2}$ alloys are studied by room-temperature Raman-scattering experiments on a series of ${mathrm{GaInP}}_{2}$ samples with various degrees of ordering, grown by organometallic vapor phase epitaxy. In measurements on the (001) growth plane, we have observed several changes in the optical-phonon range of the Raman spectrum, the most notable of which is the emergence of an extra peak at 354 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}.$ This peak is identified as a longitudinal-optical mode due to the superlattice effect in the ordered alloys. The acoustic-phonon range of the (001) Raman spectra of the ordered samples shows extra peaks at 60 and 205 ${mathrm{cm}}^{mathrm{ensuremath{-}}1},$ which are identified as the folded transverse and longitudinal-acoustic phonons, respectively. For the optical phonons, the Raman selection rules and the identification of the extra peak are tested by measuring right-angle Raman scattering. The results are consistent with the trigonal ${C}_{3ensuremath{nu}}$ symmetry of the ordered alloys." @default.
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- W1969295752 date "1997-07-15" @default.
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- W1969295752 title "Effects of spontaneous ordering on Raman spectra of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>GaInP</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>" @default.
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- W1969295752 doi "https://doi.org/10.1103/physrevb.56.1882" @default.
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