scholarly journals Localization of Electronic States in III-V Semiconductor Alloys: A Comparative Study

2017 ◽  
Vol 7 (6) ◽  
Author(s):  
C. Pashartis ◽  
O. Rubel
Keyword(s):  
Comparative Study ◽  
Electronic States ◽  
Semiconductor Alloys

Theoretical investigations of the electronic states of NaXe: A comparative study

2012 ◽  
Vol 137 (22) ◽  
pp. 224310 ◽  
Author(s):  
F. Ben Salem ◽  
M. Ben El Hadj Rhouma ◽  
F. Spiegelman ◽  
J.-M. Mestdagh ◽  
M. Hochlaf
Keyword(s):  
Comparative Study ◽  
Electronic States ◽  
Theoretical Investigations

scholarly journals Observation of Graphite-Like and Diamond-Like Nanostructures in the Raman Spectra of Natural and Synthesized MoS2 Crystals with Small Carbon Additives

2020 ◽  
Vol 21 (4) ◽  
pp. 598-620
Author(s):  
N.E. Kornienko ◽  
A.P. Naumenko ◽  
L.M. Kulikov
Keyword(s):  
Laser Radiation ◽  
Numerical Analysis ◽  
Comparative Study ◽  
Raman Spectra ◽  
Electronic States ◽  
Carbon Structures ◽  
Carbon Additives ◽  
Spectral Components ◽  
Graphite Structure ◽  
Resonant Radiation

A comparative study of Raman spectra excited by laser radiation λL = 632.8 nm and 488 nm of natural crystals of 2H-MoS2 and nanocrystallites MoS2 (C) containing 0.5 and 1.0 wt.% Carbon additives. A detailed numerical analysis of the shape of observed D and G bands was performed. The complication of the spectra of graphite-like and diamond-like structures with the appearance of additional spectral components at 1440-1500 cm-1 and 1230-1270 cm-1 as a result of doubling the size of the corresponding elementary quasi-cells are analyzed. It is shown that the frequencies of  D-bands of diamond-like nanostructures 1297 ÷ 1302 cm-1 don’t depend on λL in contrast to the change in the frequencies of the G (k)-bands. A significant effect of 632.8 nm resonant radiation on the electronic states and properties of MoS2 (C) NC was established. The strengthening of the D bands of the diamond-like structure and the ordering of the graphite structure with increasing carbon content in MoS2 (C) nanocrystals have been established. The change of spectral positions of D, G, and G (k) bands at strengthening the degree of disordering of a diamond- and graphite-like structures is considered. The influence of laser radiation on carbon structures is discussed.

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