تقرير
Effects of high-pressure on the structural, vibrational, and electronic properties of monazite-type PbCrO4
| العنوان: | Effects of high-pressure on the structural, vibrational, and electronic properties of monazite-type PbCrO4 |
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| المؤلفون: | Bandiello, E., Errandonea, D., Martinez-Garcia, D., Santamaria-Perez, D., Manjon, F. J. |
| المصدر: | Physical Review B 85, 024108 (2012) |
| سنة النشر: | 2011 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Physics - Chemical Physics, Physics - Geophysics |
| الوصف: | We have performed an experimental study of the crystal structure, lattice-dynamics, and optical properties of PbCrO4 (the mineral crocoite) at ambient and high pressures. In particular, the crystal structure, Raman-active phonons, and electronic band-gap have been accurately determined. X-ray-diffraction, Raman, and optical-absorption experiments have allowed us also to completely characterize two pressure-induced structural phase transitions. The first transition is isostructural, maintaining the monoclinic symmetry of the crystal, and having important consequences in the physical properties; among other a band-gap collapse is induced. The second one involves an increase of the symmetry of the crystal, a volume collapse, and probably the metallization of PbCrO4. The results are discussed in comparison with related compounds and the effects of pressure in the electronic structure explained. Finally, the room-temperature equation of state of the low-pressure phases is also obtained. Comment: 32 pages, 9 figures, 3 tables |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.85.024108 |
| URL الوصول: | http://arxiv.org/abs/1111.3765 |
| رقم الأكسشن: | edsarx.1111.3765 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.85.024108 |
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