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- W2032046694 abstract "The frequency dependence of 26 Raman active phonons in TCNQ crystals has been investigated as a function of temperature. Although all phonon frequencies decrease upon increasing the temperature, those at 152 and 160 cm−1 do the opposite. In general, the phonons in the middle frequency region are less sensitive to temperature than those at low and high frequency. We attribute this to mixing of the internal and external modes. By combining the pressure data with the temperature data, we have estimated the intrinsic and extrinsic contribution to the frequency changes. Volume dilatation effects are dominant for frequencies up to 400 cm−1, but phonon–phonon interactions are also present. The half-width of the phonons was measured, both at room temperature and liquid nitrogen temperature. It goes through a maximum for the phonons in the 300 cm−1 region and a minimum for those in the 1000 cm−1 region. The CN groups appear to be loosely attached to the quinone ring." @default.
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- W2032046694 date "1982-11-15" @default.
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- W2032046694 title "Temperature dependence of the Raman active phonons in TCNQ crystals" @default.
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- W2032046694 doi "https://doi.org/10.1063/1.443708" @default.
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