Optical Properties of the Quaternary II–VI Mixed Crystals in the Far Infrared Region

Burlakov, V. M.; Litvinchuk, A. P.; Pyrkov, V. N.; Tarasov, G. G.; Vitrikhovskii, N. I.

doi:10.1002/pssb.2221280204

Cited by 20 publications

(22 citation statements)

References 16 publications

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“…-TO Te Zn−Se band. The LO-TO inverted splitting is large at intermediate x values, and further increases with (1−x), as evidenced by Burlakov et al 13 Then it vanishes in the Te-and Sedilute limits, as observed by Yang et al 19 In brief, all the 'anomalous' features in the Raman/IR spectra of ZnTeSe find a natural assignment within the percolation model, on a quantitative basis. Actually, in retrospect there is a quasi-perfect analogy between the phonon mode behaviors of ZnTeSe (this work) and InGaP (Ref.…”

Section: (To Lo) Raman Lineshapesmentioning

confidence: 72%

“…Representative sets of (TO, LO) frequencies in ZnTeSe obtained from Raman/IR analysis, as taken in the literature, 13,19,20 are displayed in Fig. 3.…”

Section: Percolation Picture For Znte1−xsexmentioning

confidence: 99%

“…4 exhibit antagonist variations versus x, and become equal at x∼0.7, consistently with experimental observations. 20 An additional minor LO-TO inverted oscillator within the main TO-LO band, evidenced by IR reflectivity, 13 is assigned as the LO int. -TO Te Zn−Se band.…”

Section: (To Lo) Raman Lineshapesmentioning

confidence: 99%

“…1 in Ref. 13). At last, the minor TO mode of InGaP was identified by ab initio calculations as a pure Ga-P mode, not as a (In-P, Ga-P)-mixed mode (refer to Fig.…”

Section: Introductionmentioning

confidence: 97%

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Unification of the phonon mode behavior in semiconductor alloys: Theory andab initiocalculations

Pagès¹,

Postnikov²,

Kassem³

et al. 2008

Phys. Rev. B

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We demonstrate how to overcome serious problems in understanding and classification of vibration spectra in semiconductor alloys, following from traditional use of the virtual crystal approximation (VCA). We show that such different systems as InGaAs (1-bond→1-mode behavior), InGaP (modified 2-mode) and ZnTeSe (2-bond→1-mode) obey in fact the same phonon mode behavior -hence probably a universal one -of a percolation-type (1-bond→2-mode). The change of paradigm from the 'VCA insight' (an averaged microscopic one) to the 'percolation insight' (a mesoscopic one) offers a promising link towards the understanding of alloy disorder. The discussion is supported by ab initio simulation of the phonon density of states at the zone-center of representative supercells at intermediary composition (ZnTeSe) and at the impurity-dilute limits (all systems). In particular, we propose a simple ab initio 'protocol' to estimate the basic input parameters of our semi-empirical 'percolation' model for the calculation of the 1-bond→2-mode vibration spectra of zincblende alloys. With this, the model turns self-sufficient.

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Section: (To Lo) Raman Lineshapesmentioning

confidence: 72%

“…Representative sets of (TO, LO) frequencies in ZnTeSe obtained from Raman/IR analysis, as taken in the literature, 13,19,20 are displayed in Fig. 3.…”

Section: Percolation Picture For Znte1−xsexmentioning

confidence: 99%

Section: (To Lo) Raman Lineshapesmentioning

confidence: 99%

“…1 in Ref. 13). At last, the minor TO mode of InGaP was identified by ab initio calculations as a pure Ga-P mode, not as a (In-P, Ga-P)-mixed mode (refer to Fig.…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Unification of the phonon mode behavior in semiconductor alloys: Theory andab initiocalculations

Pagès¹,

Postnikov²,

Kassem³

et al. 2008

Phys. Rev. B

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“…Moreover, the IR spectra of ZnSeTe -type (ii) -exhibit two clear resonances [4], while only one was expected from the MREI approach. Also, reWe discuss the classification of the phonon type behavior of semiconductor alloys as apparent in the Raman and infrared spectra, i.e.…”

mentioning

confidence: 91%

Description of vibrational properties of random alloy ZnTe_1–xSe_x within the percolation model

Souhabi¹,

Chafi²,

Kassem³

et al. 2009

Phys. Status Solidi (c)

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We discuss the classification of the phonon type behavior of semiconductor alloys as apparent in the Raman and infrared spectra, i.e. in terms of types (i) 1‐bond→1‐mode and (ii) 2‐bond→1‐mode (both covered by the Modified Random Element Isodisplacement model, operating at the macroscopic scale), and also (iii) the modified 2‐mode type (exceptional), in the framework of the recent 1‐bond→2‐mode percolation model based on a description of the alloy disorder at the mesoscopic scale. The leading systems of types (i) and (iii), i.e., InGaAs and InGaP, respectively, were earlier shown to obey the percolation model. The aim of this work is to investigate whether the percolation model further extends to the leading system of the last type (ii), i.e. ZnTeSe. With this end in view, we perform a careful re‐examination of the Raman and infrared spectra of this alloy, as available in the literature. Special attention is awarded to the discussion and modeling of the puzzling multi‐mode infrared reflectivity spectra. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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