On the theory of X-ray acoustic resonance in the Bragg geometry

Пунегов, В. И.

doi:10.1134/s1063784212010215

Cited by 4 publications

(3 citation statements)

References 9 publications

(16 reference statements)

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“…16d), the lateral width of the incident X-ray beam and its angular divergence were described by the pseudo-Voigt function [131,132]. 16d), the lateral width of the incident X-ray beam and its angular divergence were described by the pseudo-Voigt function [131,132].…”

Section: May 2015mentioning

confidence: 99%

High-resolution X-ray diffraction in crystalline structures with quantum dots

Пунегов¹

2015

Phys.-Usp.

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We review the current status of nondestructive highresolution X-ray diffractometry research on semiconductor structures with quantum dots (QDs). The formalism of the statistical theory of diffraction is used to consider the coherent and diffuse X-ray scattering in crystalline systems with nanoinclusions. Effects of the shape, elastic strain, and lateral and vertical QD correlation on the diffuse scattering angular distribution near the reciprocal lattice nodes are considered. Using short-period and multicomponent superlattices as an example, we demonstrate the efficiency of data-assisted simulations in the quantitative analysis of nanostructured materials. Contents 1. Introduction. Methods of research on structures with quantum dots 419 2. High-resolution X-ray diffraction 420 2.1 Triple-axis X-ray diffractometry; 2.2 Statistical theory of X-ray diffraction. Coherent and diffuse scattering; 2.3 Direct and inverse X-ray diffraction problems 3. X-ray diffraction in structured media 423 3.1 Multilayer quantum dots; 3.2 Semiconductor structures with self-organized quantum dots; 3.3 Diffraction on 3D periodic quantum dot arrays 4. Influence of the quantum dot shape, size, and elastic strain on X-ray diffuse scattering 426 4.1 Diffuse scattering from epitaxial structures with quantum dots of different shapes; 4.2 Spheroidal quantum dots 5. Spatial correlations in the arrangement of quantum dots 432 5.1 Lateral correlation of quantum dots. Short-range order; 5.2 Vertical correlation of quantum dots 6. Quantitative X-ray diffraction analysis of heterostructures with quantum dots 437 6.1 Short-period superlattices with quantum dots; 6.2 Multicomponent heterostructures with quantum dots 7. Conclusion 443 References 443 Physics ± Uspekhi 58 (5) 419 ± 445 (2015) # 2015 Uspekhi Fizicheskikh Nauk, Russian Academy of Sciences V I Punegov Physics ± Uspekhi 58 (5) V I Punegov Physics ± Uspekhi 58 (5) V I Punegov Physics ± Uspekhi 58 (5)

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Section: May 2015mentioning

confidence: 99%

High-resolution X-ray diffraction in crystalline structures with quantum dots

Пунегов¹

2015

Phys.-Usp.

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“…With regard to theoretical studies, we should note the development of the statistical dynamical theory of X-ray diffraction in a crystal modulated by a SAW (Nesterets & Punegov, 2004;Punegov & Nesterets, 2005;Punegov et al, 2007Punegov et al, , 2010 and the application of this theory to the analysis of the results of double-and triple-axis diffractometry (Punegov, 2003;Punegov et al, 2010;Punegov & Roshchupkin, 2012;Punegov, 2012).…”

Section: Introductionmentioning

confidence: 99%

The dynamical theory of diffraction in a crystal modulated by a surface acoustic wave in the case of spatially restricted X-ray beams

Пунегов¹

2019

J Appl Cryst

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The dynamical theory of X‐ray diffraction in a crystal modulated by a surface acoustic wave (SAW) is developed for spatially restricted beams. It is shown that this approach is applicable to X‐ray reciprocal space mapping. Rayleigh's surface‐wave model is used to describe ultrasonic excitation. Based on the recurrent relations, a numerical simulation of the dynamical diffraction in a crystal modulated by a SAW is performed. Within the framework of the triple‐axis diffraction scheme, the effect of the instrumental function on X‐ray diffraction data is studied.

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“…However, if one wants to quantitatively analyse the scattered intensity distribution (i.e. reciprocal space map) near a particular reciprocal lattice vector where the coherent scattering is strong, some approximations of coherent scattering (Punegov, 2012) have to be used. These approximations are used because the current dynamical diffraction approach (Authier, 2001) assumes that the incident wave is a plane wave.…”

Section: Introductionmentioning

confidence: 99%

Applications of dynamical theory of X-ray diffraction by perfect crystals to reciprocal space mapping

et al. 2017

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The classical dynamical theory of X-ray diffraction is expanded to the special case of transversely restricted wavefronts of the incident and reflected waves. This approach allows one to simulate the two-dimensional coherently scattered intensity distribution centred around a particular reciprocal lattice vector in the so-called triple-crystal diffraction scheme. The effect of the diffractometer's instrumental function on X-ray diffraction data was studied.research papers

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On the theory of X-ray acoustic resonance in the Bragg geometry

Cited by 4 publications

References 9 publications

High-resolution X-ray diffraction in crystalline structures with quantum dots

High-resolution X-ray diffraction in crystalline structures with quantum dots

The dynamical theory of diffraction in a crystal modulated by a surface acoustic wave in the case of spatially restricted X-ray beams

Applications of dynamical theory of X-ray diffraction by perfect crystals to reciprocal space mapping

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