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- W2049838810 abstract "Abstract The temperature dependence of the 500 cm−1 Raman active phonon has been carefully investigated in Raman spectra obtained from pressed and sintered pellets of YBa2Cu3O7−x with x ≈ 0. The 500 cm−1 phonon arises from vibrations of the O (4) bridging oxygen atoms which are believed to be situated in a strongly anharmonic potential well. The linewidth of the 500 cm−1 mode has thus been studied as a function of temperature. In several samples the linewidth was observed to decrease by about 3 cm−1 near Tc and to increase again at lower temperature. A linear chain model is used to estimate the effect of charge transfer fluctuations on the 500 cm−1 mode and the results suggest that coupling of such fluctuations to the 500 cm−1 mode may influence the observed behaviour near Tc." @default.
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- W2049838810 date "1990-10-01" @default.
- W2049838810 modified "2023-09-27" @default.
- W2049838810 title "Temperature dependence of the linewidth of the 500 cm−1 Raman mode of YBa2Cu3O7−x" @default.
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