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Temperature dependence of the vibrational properties of peapods. (Left): Raman spectra of peapods between 200 and 800 cm−1 at the temperatures 100 K (solid red curve), 180 K (dashed blue curve), and 260 K (dotted black curve), respectively. Right: temperature dependence of the relative intensity ratio Hg(2)/Hg(4) for the peapods. The straight line has been fitted to the data.
