Autor: Wolny, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Structure Model for Icosahedral Quasicrystal Based on Ammann Tiling
Autorzy:: Strzałka, R.
Wolny, J.
Powiązania:: https://bibliotekanauki.pl/articles/1203441.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
61.50.Ah
Opis:: We derive a structure model for icosahedral quasicrystals. The model is based on a statistical approach involving the concept of average unit cell. This approach enables limiting calculations to real space as opposed to higher-dimensional analysis involving to unphysical atomic surface modeling. We start with the three-dimensional Ammann tiling with its two rhombohedral prototiles. For monoatomic decoration of the lattice nodes the perfect agreement with the higher-dimensional description was recently shown. In this paper we discuss the shape of the average unit cell and the first attempts for decoration scheme.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 585-587
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: The moment series expansion for quasicrystal with phason disorder
Autorzy:: Buganski, I.
Strzalka, R.
Wolny, J.
Powiązania:: https://bibliotekanauki.pl/articles/1112682.pdf
Data publikacji:: 2016-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
61.05.cp
61.43.-j
Opis:: The novel method for structural analysis of quasicrystals with phason flips is presented. The correction for diffraction peaks' intensities can be made within average unit cell approach by modification of the statistical distribution of atomic positions. Characteristic function of the distribution expanded into moment series, involving only even moments, estimates the envelope function and therefore the flip ratio can be evaluated.
Źródło:: Acta Physica Polonica A; 2016, 130, 4; 833-835
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Simple decoration model of icosahedral quasicrystals in statistical approach
Autorzy:: Strzalka, R.
Buganski, I.
Wolny, J.
Powiązania:: https://bibliotekanauki.pl/articles/1112766.pdf
Data publikacji:: 2016-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
61.50.Ah
Opis:: The statistical approach based on the average unit cell concept was recently successfully applied to structural modelling of icosahedral quasicrystals. The structure factor for arbitrarily decorated icosahedral structure was derived for model Ammann tiling (3D Penrose tiling). It is a fully physical-space model where no higher-dimensional description is needed. In the present paper we show the application of the model to the so-called simple decoration scheme - atomic decoration in the nodes, at mid-edges and along body-diagonal of structural units of 3D Penrose tiling. By analyzing the obtained calculated diffraction patterns we show the correctness of the model and its applicability to binary and ternary icosahedral phases.
Źródło:: Acta Physica Polonica A; 2016, 130, 4; 841-844
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Phononic and phasonic Debye-Waller factors for 1D quasicrystals
Autorzy:: Wolny, J.
Buganski, I.
Strzalka, R.
Powiązania:: https://bibliotekanauki.pl/articles/1113163.pdf
Data publikacji:: 2016-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
61.05.cc
61.50.Ah
Opis:: The main purpose of crystallography is to solve and refine crystal structures based on measured diffraction data. One of important corrections crucial in the refinement process is the Debye-Waller factor correction for phonons in physical, and phasons in perpendicular space. In our paper we show the limitations of the standard approaches to the Debye-Waller correction in case of quasicrystals and propose new approach based on the statistical method. For the model 1D quasicrystal we show that in case of phonons there is no significant objection against classical (exponential) Debye-Waller factor, however using different forms can slightly improve the results of a refinement. In case of phasons the classical formula gives no rise to the efficiency of the refinement and completely new approach is required. We propose a redefinition of the Debye-Waller factor in terms of the statistical approach and show its effectiveness.
Źródło:: Acta Physica Polonica A; 2016, 130, 4; 836-840
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Periodic Series of Peaks in Diffraction Patterns of Aperiodic Structures
Autorzy:: Wolny, J.
Kozakowski, B.
Kuczera, P.
Pytlik, L.
Strzałka, R.
Wnek, A.
Powiązania:: https://bibliotekanauki.pl/articles/1203573.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.-n
Opis:: Quasicrystals are aperiodic structures with no periodicity both in direct and reciprocal space. The diffraction pattern of quasicrystals consists however of the periodic series of peaks in the scattering vector space. The intensities of the peaks of all series reduced in a proper way build up the so-called envelope function common for the whole pattern. The Fourier transformed envelope gives the average unit cell which is the statistical distribution of atomic positions in physical space. The distributions lifted to high dimensions correspond to atomic surfaces - the basic concept of structural quasicrystals modeling within higher-dimensional approach.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 625-628
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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