Title :
Getting rid of acoustic phonons in heat transport
Author :
Schujman, S.B. ; Slack, G.A.
Author_Institution :
Dept. of Phys. Applied Phys. & Astron., Rensselaer Polytech. Inst., Troy, NY, USA
fDate :
Aug. 29 1999-Sept. 2 1999
Abstract :
A simple model based on the behavior of a harmonic oscillator particle inside a clathrate cage that adjusts the vibration frequency of filler atoms as a function of the cage size for different type-I clathrate compounds prepared by different authors allows us to extract conclusions regarding charge transfer, relationships between "rattler" and containing cage and also, to predict, for a given network composition what atoms would be useful to scatter certain acoustic phonon frequencies.
Keywords :
charge exchange; phonons; semiconductor materials; thermal conductivity; acoustic phonon scattering; cage size; charge transfer; clathrate cage; filler atom vibration frequency; harmonic oscillator particle; semiconductors; thermal conductivity; type-I clathrate compounds; Acoustic scattering; Atomic measurements; Charge transfer; Frequency; Lattices; Light scattering; Oscillators; Phonons; Physics; Thermal conductivity;
Conference_Titel :
Thermoelectrics, 1999. Eighteenth International Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-5451-6
DOI :
10.1109/ICT.1999.843371
