scholarly journals A Discussion on the Phonon Density of States of Amorphous Germanium for the Infrared Range

1998 ◽  
Vol 21 (1) ◽  
pp. 53-56
Author(s):  
M. A. Grado-Caffaro ◽  
M. Grado-Caffaro
Keyword(s):  
Density Of States ◽  
Harmonic Approximation ◽  
Infrared Range ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Theoretical Formulation ◽  
Amorphous Germanium

A theoretical formulation for the phonon density of states of amorphous germanium in the infrared range is proposed. This formulation is based upon the quasi-harmonic approximation and is compared with previous results.

MAXIMUM DYNAMICAL DISORDER IN AMORPHOUS GaAs

1994 ◽  
Vol 08 (03) ◽  
pp. 169-172 ◽  
Author(s):  
M.A. GRADO CAFFARO ◽  
M. GRADO CAFFARO
Keyword(s):  
Optical Absorption ◽  
Absorption Coefficient ◽  
Density Of States ◽  
Far Infrared ◽  
Conduction Band Edge ◽  
Infrared Range ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Low Frequencies ◽  
Dynamical Disorder

Maximum dynamical disorder in amorphous gallium arsenide is investigated in a special way. In particular, this maximum disorder refers to distance and it is investigated in the context of optical absorption at very low frequencies in the far-infrared range when the photon energy is larger than 2Ec, Ec being the energy at the conduction band edge. Absorption coefficient is calculated and compared with experimental work. Phonon density of states is also evaluated.

scholarly journals A Brief Study to Clarify Some Aspects Related to Vibrational Density of States for the Far Infrared Range in Amorphous Semiconductors

1998 ◽  
Vol 20 (3) ◽  
pp. 143-145 ◽  
Author(s):  
M. A. Grado-Caffaro ◽  
M. Grado-Caffaro
Keyword(s):  
Optical Absorption ◽  
Density Of States ◽  
Far Infrared ◽  
Structural Disorder ◽  
Amorphous Semiconductors ◽  
Infrared Range ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Vibrational Density Of States ◽  
Vibrational Density

Phonon density of states of amorphous semiconductors for the far-infrared range is examined analytically. On the basis of this formulation, optical absorption corresponding to structural disorder is evaluated and discussed at the far-infrared range for a-Ge and a-Si.

The solids phonon density of states reconstruction from the heat-type experiments: the computation resources

1998 ◽  
Vol 3 (0) ◽  
pp. 135-138
Author(s):  
В. М. Різак ◽  
І. М. Різак ◽  
І. П. Коссей ◽  
В. В. Маслюк
Keyword(s):  
Density Of States ◽  
Phonon Density ◽  
Phonon Density Of States

scholarly journals Phonon density of states in Fe/Cr(001) superlattices and Tb–Fe thin-film alloys

1999 ◽  
Vol 198-199 ◽  
pp. 590-592 ◽  
Author(s):  
W. Sturhahn ◽  
R. Roehlsberger ◽  
E.E. Alp ◽  
T. Ruckert ◽  
H. Schrör ◽  
...  
Keyword(s):  
Thin Film ◽  
Density Of States ◽  
Phonon Density ◽  
Phonon Density Of States

Excess Low Temperature Specific Heat and Related Phonon Density of States in a Modulated Incommensurate Dielectric

1996 ◽  
Vol 76 (13) ◽  
pp. 2334-2337 ◽  
Author(s):  
J. Etrillard ◽  
J. C. Lasjaunias ◽  
K. Biljakovic ◽  
B. Toudic ◽  
G. Coddens
Keyword(s):  
Low Temperature ◽  
Specific Heat ◽  
Density Of States ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Low Temperature Specific Heat
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