R Cravero, A Tlili, J Paterson, M Tomelleri, P Marcello, R Debord, S Pailhès, O Bourgeois, F Hippert, D Le Qui, J-Y Raty, P Noe, V M Giordano
In this work, the experimental evidence of glass-like phonon dynamics and thermal conductivity in a nanocomposite made of GeTe and amorphous carbon is reported, which is of interest for microelectronics, and specifically phase change memories. It is shown that, the total thermal conductivity is reduced by a factor of three at room temperature with respect to pure GeTe, due to the reduction of both electronic and phononic contributions. This latter, similarly to glasses, is small and weakly increasing with temperature between 100 and 300 K, indicating a mostly diffusive thermal transport and reaching a value of 0...
April 18, 2024: Small