The Density-of-States Tail and Interband Light Absorption

1984 ◽  
pp. 268-294
Author(s):  
Boris I. Shklovskii ◽  
Alex L. Efros
Keyword(s):  
Density Of States ◽  
Light Absorption ◽  
Interband Light Absorption

INFLUENCE OF THE COMPOSITION OF THE RADIO-FREQUENCY SPUTTERING ATMOSPHERE ON THE DENSITY OF STATES AND INTERBAND LIGHT ABSORPTION IN THIN Y2O3 FILMS

2021 ◽  
Vol 88 (6) ◽  
pp. 881-886
Author(s):  
O. M. Bordun ◽  
I. O. Bordun ◽  
I. M. Kofliuk ◽  
I. Yo. Kukharskyy ◽  
I. I. Medvid
Keyword(s):  
Absorption Band ◽  
Density Of States ◽  
Interband Absorption ◽  
Long Wavelength ◽  
Plasma Sputtering ◽  
Radio Frequency Sputtering ◽  
Ion Plasma ◽  
Quasi Classical Approximation ◽  
Heavily Doped ◽  
Interband Light Absorption

The long-wavelength edge of the fundamental absorption band of thin Y2O3 films obtained by radiofrequency ion-plasma sputtering is investigated. The edge of interband absorption after annealing of the films in an atmosphere of argon, oxygen, or a mixture of these gases is shown to be approximated well by the Urbach empirical rule. Diffractograms of the obtained films were studied and a model of a heavily doped or defective semiconductor in the quasi-classical approximation was used to analyze the experimental results. This model allows determining the radius of the basic electronic state, the screening radius, and the rootmean-square potential depending on the sputtering atmosphere.

scholarly journals Direct Interband Light Absorption in Strongly Prolated Ellipsoidal Quantum Dots’ Ensemble

2008 ◽  
Vol 4 (2) ◽  
pp. 106-112 ◽  
Author(s):  
K. G. Dvoyan ◽  
D. B. Hayrapetyan ◽  
E. M. Kazaryan
Keyword(s):  
Quantum Dots ◽  
Light Absorption ◽  
Interband Light Absorption

scholarly journals Оптические свойства соединений YFe-=SUB=-2-=/SUB=- и TbFe-=SUB=-2-=/SUB=-

2020 ◽  
Vol 62 (7) ◽  
pp. 1004
Author(s):  
Ю.В. Князев ◽  
Ю.И. Кузьмин
Keyword(s):  
Optical Properties ◽  
Spectral Characteristic ◽  
Wavelength Range ◽  
Optical Conductivity ◽  
Light Absorption ◽  
Electronic States ◽  
Electron Transitions ◽  
Quantum Electron ◽  
Interband Light Absorption ◽  
Conductivity Spectra

Ellipsometric investigation of the optical properties of YFe2 and TbFe2 intermetalic compounds have been carried out in wavelength range of 0.22 –15 μm. A number of electronic and spectral characteristic was determined. Nature of interband light absorption in these materials is discussed on base of comparative analyses of experimental and theoretical optical conductivity spectra. Experimental optical conductivities of the compounds are shown to conform qualitatively to spectra calculated from densities of electronic states in the region of quantum electron transitions.

Exciton states and direct interband light absorption in the ensemble of toroidal quantum dots

2017 ◽  
Vol 11 (04) ◽  
pp. 1 ◽  
Author(s):  
Davit A. Baghdasaryan ◽  
David B. Hayrapetyan ◽  
Hayk A. Sarkisyan ◽  
Eduard M. Kazaryan ◽  
Sergey I. Pokutnyi
Keyword(s):  
Quantum Dots ◽  
Light Absorption ◽  
Interband Light Absorption
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