Anomalous phonon intensities in the Raman spectrum of disordered CsMg1−xCoxCl3 |
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Authors: | I.W. Johnstone G.D. Jones D.J. Lockwood |
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Affiliation: | Division of Physics, National Research Council of Canada, Ottawa, Canada K1A OR6 |
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Abstract: | The five Raman-active phonons have been measured at low temperatures and for a range of x in the disordered lattice CsMg1-xCoxCl3. While the E2ga, E2gb, E2gc and A1g modes at 55.0, 132.0, 189.0 and 255.0 cm?1 for x = 0 exhibit normal one-mode behaviour, the intensity of the E1g phonon at 127.5 cm?1 has a most unusual concentration dependence which requires a new theory. |
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