Interband absorption of light in bismuth nanostructures

Interband absorption of light in bismuth nanostructures has been studied in the framework of a complex model for electron spectrum of Bi, such as the Cohen model, the Abrikosov-Falkovsky model, and the McClure model. The obtained results differ qualitatively from those obtained in the framework of s...

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Main Author: Mustafaev, N.
Format: Article
Language:English
Published: D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2012-10-01
Series:Moldavian Journal of the Physical Sciences
Online Access:https://mjps.nanotech.md/archive/2012/article/21326
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author Mustafaev, N.
author_facet Mustafaev, N.
author_sort Mustafaev, N.
collection DOAJ
description Interband absorption of light in bismuth nanostructures has been studied in the framework of a complex model for electron spectrum of Bi, such as the Cohen model, the Abrikosov-Falkovsky model, and the McClure model. The obtained results differ qualitatively from those obtained in the framework of simple band models, such as the parabolic band model and the Lax two-band model. It is shown that both the interband transition with quantum number conservation and the interband transition without quantum number conservation are allowed in the framework of complex models for electron energy spectrum of Bi. Due to the interband transitions without quantum number conservation (these transitions are forbidden in simple band models), the peak of optical absorption in measured spectra can occur at lower photon energies than in the spectra simulated in the framework of simple band models. A similar difference between the peaks was observed by Black et al. in Bi nanowires. The interband transitions without quantum number conservation substantially complicate the oscillation pattern and the identification of absorption peaks. The frequency dependence of the coefficient of interband absorption calculated in the framework of the McClure model has pronounced peaks, whereas in the simple band models this dependence has a step-like pattern. It is concluded that the McClure model enables the oscillation behavior of interband absorption in bismuth nanostructures to be properly described.
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spelling doaj.art-416bf5d1091c4eaaa2b948a3af6e414f2022-12-21T19:54:00ZengD.Ghitu Institute of Electronic Engineering and NanotechnologiesMoldavian Journal of the Physical Sciences1810-648X2537-63652012-10-0111323524221326Interband absorption of light in bismuth nanostructuresMustafaev, N.Interband absorption of light in bismuth nanostructures has been studied in the framework of a complex model for electron spectrum of Bi, such as the Cohen model, the Abrikosov-Falkovsky model, and the McClure model. The obtained results differ qualitatively from those obtained in the framework of simple band models, such as the parabolic band model and the Lax two-band model. It is shown that both the interband transition with quantum number conservation and the interband transition without quantum number conservation are allowed in the framework of complex models for electron energy spectrum of Bi. Due to the interband transitions without quantum number conservation (these transitions are forbidden in simple band models), the peak of optical absorption in measured spectra can occur at lower photon energies than in the spectra simulated in the framework of simple band models. A similar difference between the peaks was observed by Black et al. in Bi nanowires. The interband transitions without quantum number conservation substantially complicate the oscillation pattern and the identification of absorption peaks. The frequency dependence of the coefficient of interband absorption calculated in the framework of the McClure model has pronounced peaks, whereas in the simple band models this dependence has a step-like pattern. It is concluded that the McClure model enables the oscillation behavior of interband absorption in bismuth nanostructures to be properly described.https://mjps.nanotech.md/archive/2012/article/21326
spellingShingle Mustafaev, N.
Interband absorption of light in bismuth nanostructures
Moldavian Journal of the Physical Sciences
title Interband absorption of light in bismuth nanostructures
title_full Interband absorption of light in bismuth nanostructures
title_fullStr Interband absorption of light in bismuth nanostructures
title_full_unstemmed Interband absorption of light in bismuth nanostructures
title_short Interband absorption of light in bismuth nanostructures
title_sort interband absorption of light in bismuth nanostructures
url https://mjps.nanotech.md/archive/2012/article/21326
work_keys_str_mv AT mustafaevn interbandabsorptionoflightinbismuthnanostructures