A model of structural disorder in (Ba2-Cu2-O4+x)/ (Ca-Cu-O2)n superlattices
The structural disorder in (Ba2Cu2O4+x)/(CaCuO2)n superlattices with ultrathin individual layers was investigated. Numerical simulations of x-ray spectra were carried out following a kinematical approach in a simplified model structure. The model assumes a two-dimensional layer by layer growth in wh...
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2000
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02179792_v14_n25-27_p2719_Pasquini http://hdl.handle.net/20.500.12110/paper_02179792_v14_n25-27_p2719_Pasquini |
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paper:paper_02179792_v14_n25-27_p2719_Pasquini2023-06-08T15:21:12Z A model of structural disorder in (Ba2-Cu2-O4+x)/ (Ca-Cu-O2)n superlattices barium oxide calcium oxide copper complex chaotic dynamics chemical composition conductor conference paper crystal structure crystallization dispersion film molecular model pressure measurement roentgen spectroscopy The structural disorder in (Ba2Cu2O4+x)/(CaCuO2)n superlattices with ultrathin individual layers was investigated. Numerical simulations of x-ray spectra were carried out following a kinematical approach in a simplified model structure. The model assumes a two-dimensional layer by layer growth in which mixed composition layers can be corrugated to adjust the internal stresses due to the large mismatch between the constituent oxides. An additional random disorder is added to take into account the experimental dispersion in the amount of material deposited in each iteration. The model was successfully used to simulate x-ray spectra for samples with non integer n ranging from 2 to 16, grown in optimal conditions to obtain a superconducting behavior. The same model was used to simulate spectra of samples grown at lower pressures monitored with in-situ RHEED diagnostic. In this case, random disorder results more than one order of magnitude smaller. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02179792_v14_n25-27_p2719_Pasquini http://hdl.handle.net/20.500.12110/paper_02179792_v14_n25-27_p2719_Pasquini |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
barium oxide calcium oxide copper complex chaotic dynamics chemical composition conductor conference paper crystal structure crystallization dispersion film molecular model pressure measurement roentgen spectroscopy |
| spellingShingle |
barium oxide calcium oxide copper complex chaotic dynamics chemical composition conductor conference paper crystal structure crystallization dispersion film molecular model pressure measurement roentgen spectroscopy A model of structural disorder in (Ba2-Cu2-O4+x)/ (Ca-Cu-O2)n superlattices |
| topic_facet |
barium oxide calcium oxide copper complex chaotic dynamics chemical composition conductor conference paper crystal structure crystallization dispersion film molecular model pressure measurement roentgen spectroscopy |
| description |
The structural disorder in (Ba2Cu2O4+x)/(CaCuO2)n superlattices with ultrathin individual layers was investigated. Numerical simulations of x-ray spectra were carried out following a kinematical approach in a simplified model structure. The model assumes a two-dimensional layer by layer growth in which mixed composition layers can be corrugated to adjust the internal stresses due to the large mismatch between the constituent oxides. An additional random disorder is added to take into account the experimental dispersion in the amount of material deposited in each iteration. The model was successfully used to simulate x-ray spectra for samples with non integer n ranging from 2 to 16, grown in optimal conditions to obtain a superconducting behavior. The same model was used to simulate spectra of samples grown at lower pressures monitored with in-situ RHEED diagnostic. In this case, random disorder results more than one order of magnitude smaller. |
| title |
A model of structural disorder in (Ba2-Cu2-O4+x)/ (Ca-Cu-O2)n superlattices |
| title_short |
A model of structural disorder in (Ba2-Cu2-O4+x)/ (Ca-Cu-O2)n superlattices |
| title_full |
A model of structural disorder in (Ba2-Cu2-O4+x)/ (Ca-Cu-O2)n superlattices |
| title_fullStr |
A model of structural disorder in (Ba2-Cu2-O4+x)/ (Ca-Cu-O2)n superlattices |
| title_full_unstemmed |
A model of structural disorder in (Ba2-Cu2-O4+x)/ (Ca-Cu-O2)n superlattices |
| title_sort |
model of structural disorder in (ba2-cu2-o4+x)/ (ca-cu-o2)n superlattices |
| publishDate |
2000 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02179792_v14_n25-27_p2719_Pasquini http://hdl.handle.net/20.500.12110/paper_02179792_v14_n25-27_p2719_Pasquini |
| _version_ |
1768544638110531584 |