Low-Frequency Optical-Phonon Spectrum of Benzil

1969 ◽  
Vol 187 (3) ◽  
pp. 1128-1131 ◽  
Author(s):  
R. Claus ◽  
H. H. Hacker ◽  
H. W. Schrötter ◽  
J. Brandmüller ◽  
S. Haussühl
Keyword(s):  
Optical Phonon ◽  
Phonon Spectrum ◽  
Low Frequency

LOW-FREQUENCY PHONON SPECTRUM PECULIARITIES OF Sn-Pb ALLOYS

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1037-C6-1038
Author(s):  
V.M. Pan ◽  
B.G. Nikitin ◽  
A.M. Korostil ◽  
V.V. Nemoshkalenko ◽  
V.P. Dovgopol ◽  
...  
Keyword(s):  
Phonon Spectrum ◽  
Low Frequency

scholarly journals Low-frequency optical phonon modes and carrier mobility in the halide perovskite CH3NH3PbBr3 using terahertz time-domain spectroscopy

2017 ◽  
Vol 111 (20) ◽  
pp. 201903 ◽  
Author(s):  
Daming Zhao ◽  
Jonathan M. Skelton ◽  
Hongwei Hu ◽  
Chan La-o-vorakiat ◽  
Jian-Xin Zhu ◽  
...  
Keyword(s):  
Time Domain ◽  
Optical Phonon ◽  
Carrier Mobility ◽  
Low Frequency ◽  
Terahertz Time Domain Spectroscopy ◽  
Phonon Modes ◽  
Time Domain Spectroscopy ◽  
Halide Perovskite

scholarly journals THE PHONON SPECTRUM OF THE OCTAGONAL TILING

1993 ◽  
Vol 07 (06n07) ◽  
pp. 1505-1525 ◽  
Author(s):  
J. LOS ◽  
T. JANSSEN ◽  
F. GÄHLER
Keyword(s):  
Specific Heat ◽  
Density Of States ◽  
Phonon Spectrum ◽  
Low Frequency ◽  
Debye Model ◽  
Square Lattice ◽  
Total Density ◽  
Unit Cells ◽  
Linear Behaviour ◽  
Total Density Of States

A study of the phonon spectrum of the octagonal tiling is presented, by calculating and analysing the properties of the spectrum of perfect and randomized commensurate approximants with unit cells containing up to 8119 vertices. The total density of states, obtained by numerical integration over the Brillouin zone, exhibits much structure, and in the low frequency range of the spectrum there is deviation from the normal linear behaviour in the form of pseudogaps. For randomized approximants these pseudogaps disappear and the density of states is globally smoothened. It turns out that the widths of the gaps in the dispersion vanish in the low frequency limit. Therefore the scaling behaviour of the lowest branches tends to the behaviour of an absolutely continuous spectrum, which is not the case at higher frequencies. As an application, the vibrational specific heat of the different tiling models is calculated and compared to the specific heat of a square lattice and of a Debye model.

scholarly journals Extremely low-frequency phonon material and its temperature- and photo-induced switching effects

2020 ◽  
Vol 11 (33) ◽  
pp. 8989-8998
Author(s):  
Takaya Yoshida ◽  
Koji Nakabayashi ◽  
Hiroko Tokoro ◽  
Marie Yoshikiyo ◽  
Asuka Namai ◽  
...  
Keyword(s):  
Optical Phonon ◽  
Phonon Mode ◽  
Low Frequency ◽  
Switching Effect ◽  
Two Dimensional ◽  
Optical Phonon Mode ◽  
Extremely Low Frequency

Extremely low-frequency optical phonon mode in Rb-intercalated two-dimensional cyanide-bridged Co–W bimetal assembly and its temperature- and photo-induced switching effect.

Electron-Phonon Scattering in GaN/AlN and GaAs/AlAs Quantum Wells

1997 ◽  
Vol 482 ◽  
Author(s):  
T. F. Forbang ◽  
C. R. McIntyre
Keyword(s):  
Quantum Wells ◽  
Optical Phonon ◽  
Phonon Spectrum ◽  
Phonon Scattering ◽  
Relaxation Times ◽  
Longitudinal Optical ◽  
Longitudinal Optical Phonon ◽  
Phonon Modes ◽  
Optical Phonon Scattering ◽  
Electron Phonon Scattering

AbstractWe have studied the effects on the phonon spectrum and on the electron-longitudinal optical phonon scattering in GaN/AlN and GaAs/AlAs quantum wells. Phonon modes and potentials have been calculated for both systems. Results for emission due to electroninterface phonons interactions are presented. We will discuss the implications for relaxation times and electron mobility due to modified LO-phonon scattering in both systems.

scholarly journals Effect of the Al content on the optical phonon spectrum inMg1−xAlxB2

2001 ◽  
Vol 65 (2) ◽  
Author(s):  
P. Postorino ◽  
A. Congeduti ◽  
P. Dore ◽  
A. Nucara ◽  
A. Bianconi ◽  
...  
Keyword(s):  
Optical Phonon ◽  
Phonon Spectrum ◽  
Al Content

1/f NOISES OF HOMOPOLAR AND HETEROPOLAR SEMICONDUCTORS

2000 ◽  
Vol 14 (07) ◽  
pp. 751-760 ◽  
Author(s):  
F. V. GASPARYAN ◽  
S. V. MELKONYAN ◽  
V. M. AROUTIOUNYAN ◽  
H. V. ASRIYAN
Keyword(s):  
Experimental Data ◽  
Spectral Density ◽  
Temperature Dependence ◽  
Conduction Electron ◽  
Optical Phonon ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Noise Spectral Density ◽  
Analytical Expressions

The low-frequency noise spectral density with the 1/f spectrum for homopolar and heteropolar semi-conductors is theoretically obtained taking into account conduction electron–optical phonon interactions. The analytical expressions of the spectral density and Hooge's α H parameter are presented. The analytical temperature dependence of Hooge's parameter is compared with experimental data for n-Si and n-GaAs.

Optical Phonon Spectrum of Sodium Bromate by Laser Raman Spectroscopy

1972 ◽  
Vol 53 (2) ◽  
pp. 577-585 ◽  
Author(s):  
A. d'Andrea ◽  
B. Fornari ◽  
G. Mattei ◽  
M. Pagannone ◽  
M. Scrocco
Keyword(s):  
Raman Spectroscopy ◽  
Optical Phonon ◽  
Phonon Spectrum ◽  
Laser Raman Spectroscopy ◽  
Sodium Bromate ◽  
Laser Raman
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