A Diffraction Method of Study of Thermal Quasiorder in a Finite Two-Dimensional Harmonic Lattice
| العنوان: | A Diffraction Method of Study of Thermal Quasiorder in a Finite Two-Dimensional Harmonic Lattice |
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| المؤلفون: | P. Aranda, B. Croset |
| المصدر: | Journal de Physique I. 5:1213-1222 |
| بيانات النشر: | EDP Sciences, 1995. |
| سنة النشر: | 1995 |
| مصطلحات موضوعية: | Diffraction, Optics, business.industry, Lattice (order), Thermal, Mathematical analysis, General Engineering, Short range order, Quasicrystal, Statistical and Nonlinear Physics, business, Mathematics |
| الوصف: | Due to the non-existence of long-range order, the diffraction peaks of 2D-solids are considered to have a power-law shape q p η-2 . Taking into account the finite size effects and calculating the powder average, we show that this power-law behaviour appears only for high q p and then for very small intensities. It is therefore quite difficult and hazardous to characterise the quasiorder by using this asymptotic behaviour. Although the shape of the central part of the peak cannot be used to characterise the quasiorder, we show that, for a fairly good resolution, it is possible to determine η using this central part. This determination can be done irrespectively with the other details of the system by comparing the peak width to its value at low temperature, i.e., at low value of η. By using two diffraction peaks, we propose the simple relation : η(Q B1 )/Q 2 B 1 = η(Q B2 )/Q 2 B 2 as a check of the two-dimensional quasiorder. |
| تدمد: | 1286-4862 1155-4304 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::8c4e0e09412222cf7f858c86d78482e4 https://doi.org/10.1051/jp1:1995192 |
| رقم الأكسشن: | edsair.doi...........8c4e0e09412222cf7f858c86d78482e4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 12864862 11554304 |
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