Anharmonic lifetimes of low-frequency optical phonons in LaF3with the use of monoenergetic generation and detection

1983 ◽  
Vol 28 (8) ◽  
pp. 4786-4792 ◽  
Author(s):  
R. S. Meltzer ◽  
J. E. Rives ◽  
G. S. Dixon
Keyword(s):  
Low Frequency ◽  
Optical Phonons

Temperature dependence of low-frequency optical phonons in TlInS2

2015 ◽  
Vol 12 (6) ◽  
pp. 826-829 ◽  
Author(s):  
Raul Paucar ◽  
YongGu Shim ◽  
Kazuki Wakita ◽  
Oktay Alekperov ◽  
Nazim Mamedov
Keyword(s):  
Temperature Dependence ◽  
Low Frequency ◽  
Optical Phonons

Hypersonic Attenuation by Low-Frequency Optical Phonons in SrTiO3Crystals

1969 ◽  
Vol 188 (3) ◽  
pp. 1456-1464 ◽  
Author(s):  
R. NAVA ◽  
R. CALLAROTTI ◽  
H. CEVA ◽  
A. MARTINET
Keyword(s):  
Low Frequency ◽  
Optical Phonons

Critical Roles of High- and Low-Frequency Optical Phonons in Photodynamics of Zero-Dimensional Perovskite-like (C6H22N4Cl3)SnCl3 Crystals

2019 ◽  
Vol 10 (24) ◽  
pp. 7586-7593 ◽  
Author(s):  
Xiaoyu Liu ◽  
Wenhui Wu ◽  
Yumeng Zhang ◽  
Yuanyuan Li ◽  
Huaxin Wu ◽  
...  
Keyword(s):  
Low Frequency ◽  
Optical Phonons

Low Frequency Optical Phonons in Bi4-xSmxTi3O12

2012 ◽  
Vol 433 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Ippei Kusunoki ◽  
Yuhji Tsujimi ◽  
Makoto Iwata
Keyword(s):  
Low Frequency ◽  
Optical Phonons

Low-frequency optical phonons in SrTiO3 under uniaxial stress

2013 ◽  
Vol 62 (7) ◽  
pp. 1014-1018 ◽  
Author(s):  
Yuhji Tsujimi ◽  
Tomori Yanagisawa ◽  
Toru Mogami
Keyword(s):  
Low Frequency ◽  
Uniaxial Stress ◽  
Optical Phonons

Optical Phonons of ZnS1–xSex and CdS1–xSex Mixed Crystals: Pressure Effects

1970 ◽  
Vol 24 (2) ◽  
pp. 187-192 ◽  
Author(s):  
J. R. Ferraro ◽  
S. S. Mitra ◽  
C. Postmus ◽  
C. Hoskins ◽  
E. C. Siwiec
Keyword(s):  
Low Frequency ◽  
Mixed Crystals ◽  
Pressure Effects ◽  
Frequency Mode ◽  
Optical Phonons ◽  
High Frequency Mode ◽  
Mode Behavior ◽  
Low Concentrations ◽  
Ir Transmission ◽  
Low Frequency Mode

The ir transmission of the optical phonons for the mixed crystals ZnS1– xSe x and CdS1– xSe x, at various concentrations of x, was studied as a function of pressure up to about 43 kbar. At all concentrations a two-mode behavior was observed. For both systems the high frequency mode exhibits a greater pressure dependence than the low frequency mode. The gap mode observed for the ZnS1– xSe x mixed crystals at low concentrations of Se is found to be pressure insensitive as contrasted to the Cd1- xSe x mixed crystals.

Low-frequency optical phonons in silica

1980 ◽  
Vol 34 (5) ◽  
pp. 305-308 ◽  
Author(s):  
Felipe R. Barbosa ◽  
Ramakant Srivastava
Keyword(s):  
Low Frequency ◽  
Optical Phonons

scholarly journals BROWNIAN MOTION OF SOLITONS IN THE ϕ4MODEL

1996 ◽  
Vol 10 (11) ◽  
pp. 1329-1338
Author(s):  
F. ALDABE
Keyword(s):  
Brownian Motion ◽  
Correlation Function ◽  
Soliton Solution ◽  
Low Frequency ◽  
Random Force ◽  
Translational Symmetry ◽  
Optical Phonons ◽  
Zero Modes

We derive an expression for the correlation function of the random force on a soliton which is consistent with the constraints needed to integrate out the zero modes which appear due to the broken translational symmetry of the soliton solution. It is shown that when the constraint does not commute with the operator which defines the correlation function, i.e. when the operator is not physical, only low frequency phonon contributions may be considered. On the contrary, when the correlation function of the random force on the soliton is constructed with physical operators one may also include in a correct manner the contributions from the optical phonons.

RAMAN SCATTERING OF HEXAPOD-LIKE PBS NANOMATERIALS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 3257-3262 ◽  
Author(s):  
PENGGANG YIN ◽  
RUI ZHANG ◽  
YAHUI ZHANG ◽  
LIN GUO
Keyword(s):  
Low Frequency ◽  
Longitudinal Optical ◽  
Vibration Modes ◽  
Optical Phonons ◽  
Power Laser ◽  
Lead Sulphide ◽  
First Order ◽  
Oxygen Condition ◽  
Combination Modes ◽  
Frequency Area

A hexapod-like lead sulphide (PbS) nanostructure with six symmetric arms were investigated by Raman spectrum. The first order longitudinal optical phonons (1–LO) and second order longitudinal optical phonons (2–LO) vibration modes locate at 205 cm-1 and 456 cm-1, respectively. The transverse optical ( TO ) mode and combination modes (LO+TO and TO+TA) exist in the low frequency area. In air circumstance, the surface of PbS nanomaterials can be easily damaged by laser with power ~1.2 mW. The vacuum circumstance can avoid from photodegradation efficiently. Therefore, both irradiation by enough power laser and oxygen condition are necessary conditions for the photodegradation of PbS nanomaterials.

Dynamics of the low-frequency optical phonons ofl-alanine

1993 ◽  
Vol 48 (1) ◽  
pp. 172-177 ◽  
Author(s):  
Robert A. Crowell ◽  
Eric L. Chronister
Keyword(s):  
Low Frequency ◽  
Optical Phonons
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