Vibrational properties of the layered semiconductor germanium sulfide under hydrostatic pressure: Theory and experiment

1996 ◽  
Vol 53 (22) ◽  
pp. 14806-14817 ◽  
Author(s):  
H. C. Hsueh ◽  
M. C. Warren ◽  
H. Vass ◽  
G. J. Ackland ◽  
S. J. Clark ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Vibrational Properties ◽  
Layered Semiconductor ◽  
Germanium Sulfide ◽  
Theory And Experiment

Anharmonic vibrational properties of CH2F2: A comparison of theory and experiment

1991 ◽  
Vol 95 (11) ◽  
pp. 8323-8336 ◽  
Author(s):  
R. D. Amos ◽  
N. C. Handy ◽  
W. H. Green ◽  
D. Jayatilaka ◽  
A. Willetts ◽  
...  
Keyword(s):  
Vibrational Properties ◽  
Theory And Experiment

scholarly journals Anisotropic Optical and Vibrational Properties of GeS

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3109
Author(s):  
Natalia Zawadzka ◽  
Łucja Kipczak ◽  
Tomasz Woźniak ◽  
Katarzyna Olkowska-Pucko ◽  
Magdalena Grzeszczyk ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Optical Band Gap ◽  
Vibrational Properties ◽  
Excitation Energies ◽  
Functional Theory ◽  
Germanium Sulfide ◽  
Recombination Processes ◽  
Linearly Polarized ◽  
Armchair Direction

The optical response of bulk germanium sulfide (GeS) is investigated systematically using different polarization-resolved experimental techniques, such as photoluminescence (PL), reflectance contrast (RC), and Raman scattering (RS). It is shown that while the low-temperature (T = 5 K) optical band-gap absorption is governed by a single resonance related to the neutral exciton, the corresponding emission is dominated by the disorder/impurity- and/or phonon-assisted recombination processes. Both the RC and PL spectra are found to be linearly polarized along the armchair direction. The measured RS spectra over a broad range from 5 to 300 K consist of six Raman peaks identified with the help of Density Functional Theory (DFT) calculations: Ag1, Ag2, Ag3, Ag4, B1g1, and B1g2, which polarization properties are studied under four different excitation energies. We found that the polarization orientations of the Ag2 and Ag4 modes under specific excitation energy can be useful tools to determine the GeS crystallographic directions: armchair and zigzag.

scholarly journals Anisotropic Optical And Vibrational Properties Of GeS

2021 ◽  
Author(s):  
Natalia Zawadzka ◽  
Łucja Kipczak ◽  
Tomasz Woźniak ◽  
Katarzyna Olkowska-Pucko ◽  
Magdalena Grzeszczyk ◽  
...  
Keyword(s):  
Low Temperature ◽  
Dft Calculations ◽  
Excitation Energy ◽  
Optical Band Gap ◽  
Vibrational Properties ◽  
Excitation Energies ◽  
Germanium Sulfide ◽  
Recombination Processes ◽  
Linearly Polarized ◽  
Armchair Direction

The optical response of bulk germanium sulfide (GeS) is investigated systematically using different polarization-resolved experimental techniques, such as photoluminescence (PL), reflectance contrast (RC), and Raman scattering (RS). It is shown that while the low-temperature (T=5 K) optical band-gap absorption is governed by a single resonance related to the neutral exciton, the corresponding emission is dominated by the disorder/impurity- and/or phonon-assisted recombination processes. Both the RC and PL spectra are found to be linearly polarized along the armchair direction. The low and room (T=300 K) temperature RS spectra consist of six Raman peaks identified with the help of Density Fuctional Theory (DFT) calculations: Ag1, Ag2, Ag3, Ag4, B1g1, and B1g2, which polarization properties are studied under four different excitation energies. We found that the polarization orientations of the Ag2 and Ag4 modes under specific excitation energy can be useful tools to determine the GeS crystallographic directions: armchair and zigzag.

ChemInform Abstract: Anharmonic Vibrational Properties of CH2F2: A Comparison of Theory and Experiment.

ChemInform ◽  
2010 ◽  
Vol 23 (13) ◽  
pp. no-no
Author(s):  
R. D. AMOS ◽  
N. C. HANDY ◽  
W. H. GREEN ◽  
D. JAYATILAKA ◽  
A. WILLETTS ◽  
...  
Keyword(s):  
Vibrational Properties ◽  
Theory And Experiment

A Comparative Study of the Structural, Electronic, and Vibrational Properties of NH3BH3and LiNH2BH3: Theory and Experiment

ChemPhysChem ◽  
2009 ◽  
Vol 10 (11) ◽  
pp. 1825-1833 ◽  
Author(s):  
Seung Mi Lee ◽  
Xiang-Dong Kang ◽  
Ping Wang ◽  
Hui-Ming Cheng ◽  
Young Hee Lee
Keyword(s):  
Comparative Study ◽  
Vibrational Properties ◽  
Theory And Experiment
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