A new experimental method for the determination of the one phonon density of states in GaAs

1982 ◽  
Vol 41 (7) ◽  
pp. 557-560 ◽  
Author(s):  
R. Carles ◽  
A. Zwick ◽  
M.A. Renucci ◽  
J.B. Renucci
Keyword(s):  
Experimental Method ◽  
Density Of States ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
The One

Direct determination of the phonon density of states inβ−Sn

2000 ◽  
Vol 61 (22) ◽  
pp. R14881-R14884 ◽  
Author(s):  
A. Barla ◽  
R. Rüffer ◽  
A. I. Chumakov ◽  
J. Metge ◽  
J. Plessel ◽  
...  
Keyword(s):  
Density Of States ◽  
Direct Determination ◽  
Phonon Density ◽  
Phonon Density Of States

The Phonon Densities of States of AlN and ZrN

1995 ◽  
Vol 395 ◽  
Author(s):  
C.-K. Loong
Keyword(s):  
Thermal Conductivity ◽  
Molecular Dynamics ◽  
Density Of States ◽  
Neutron Spectroscopy ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Phonon Spectra ◽  
Densities Of States ◽  
The One ◽  
Dynamics Simulations

ABSTRACTPhonons are thought to play a crucial role in the high thermal conductivity of AIN and ZrN. Using time-of-flight neutron spectroscopy, we have measured the phonon spectra of A1N and ZrN up to 300 meV (2400 cm−1). The one-phonon density of states (DOS) of AIN exhibits relatively sharp bands at about 33, 63, 83 and 91 meV. In addition, distinct multiple-phonon excitations were observed at ∼173 and 255 meV. The phonon DOS of ZrN displays similar features with the corresponding phonon energies shifted toward lower energies. The measured DOS of AIN is compared with results of molecular-dynamics simulations.

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