تقرير
Dynamic Displacement Disorder of Cubic BaTiO$_3$
| العنوان: | Dynamic Displacement Disorder of Cubic BaTiO$_3$ |
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| المؤلفون: | Paściak, M., Welberry, T. R., Kulda, J., Leoni, S., Hlinka, J. |
| المصدر: | Phys. Rev. Lett. 120, 167601 (2018) |
| سنة النشر: | 2017 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | The three dimensional distribution of the X-ray diffuse scattering intensity of BaTiO$_3$ has been recorded in a synchrotron experiment and simultaneously computed using molecular dynamics simulations of a shell-model. Together these have allowed the details of the disorder in paraelectric BaTiO$_3$ to be clarified. The narrow sheets of diffuse scattering, related to the famous anisotropic longitudinal correlations of Ti ions, are shown to be caused entirely by the overdamped anharmonic soft phonon branch. This finding demonstrates that the occurrence of narrow sheets of diffuse scattering agrees with a displacive picture of the cubic phase of this textbook ferroelectric material. Comment: 5 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.120.167601 |
| URL الوصول: | http://arxiv.org/abs/1711.06566 |
| رقم الأكسشن: | edsarx.1711.06566 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.120.167601 |
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