Low-temperature specific heat and thermal conductivity measurements have been performed on (Cs2O)0.14(B2O 3)0.86 glass in the temperature range from 1.5 K to 30 K. The caesium ions, weakly bonded to the B-O framework, are able of low-frequency local oscillations and affect the vibrational dynamics in the region of the boson peak. A resonant scattering mechanism between heat carrying acoustic phonons and caesium local modes does not appear to influence the plateau in the thermal conductivity.
Low-temperature thermal properties of (Cs2O)0.14(B2O3)0.86 glass
CRUPI, CRISTINA;D'ANGELO, Giovanna;TRIPODO, Gaspare;
2007-01-01
Abstract
Low-temperature specific heat and thermal conductivity measurements have been performed on (Cs2O)0.14(B2O 3)0.86 glass in the temperature range from 1.5 K to 30 K. The caesium ions, weakly bonded to the B-O framework, are able of low-frequency local oscillations and affect the vibrational dynamics in the region of the boson peak. A resonant scattering mechanism between heat carrying acoustic phonons and caesium local modes does not appear to influence the plateau in the thermal conductivity.File in questo prodotto:
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