Report
Infrared and Raman spectroscopy measurements of a transition in the crystal structure and a closing of the energy gap of BiTeI under pressure
| العنوان: | Infrared and Raman spectroscopy measurements of a transition in the crystal structure and a closing of the energy gap of BiTeI under pressure |
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| المؤلفون: | Tran, M. K., Levallois, J., Lerch, P., Teyssier, J., Kuzmenko, A. B., Autès, G., Yazyev, O. V., Ubaldini, A., Giannini, E., van der Marel, D., Akrap, A. |
| المصدر: | Phys. Rev. Lett. 112, 047402 (2014) |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | BiTeI is a giant Rashba spin splitting system, in which a non-centro symmetric topological phase has recently been suggested to appear under high pressure. We investigated the optical properties of this compound, reflectivity and transmission, under pressures up to $15$ GPa. The gap feature in the optical conductivity vanishes above $p \sim 9$ GPa and does not reappear up to at least $15$ GPa. The plasma edge, associated with intrinsically doped charge carriers, is smeared out through a phase transition at $9$ GPa. Using high pressure Raman spectroscopy, we follow the vibrational modes of BiTeI, providing additional clear evidence that the transition at 9 GPa involves a change of crystal structure. This change of crystal structure possibly inhibits the high-pressure topological phase from occurring. Comment: 11 pages, 7 figures, with Supplemental Material, Accepted by PRL Dec 17, 2013 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.112.047402 |
| URL الوصول: | http://arxiv.org/abs/1305.5485 |
| رقم الانضمام: | edsarx.1305.5485 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.112.047402 |
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