تقرير
Phonon anomaly in BaFe2As2
| العنوان: | Phonon anomaly in BaFe2As2 |
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| المؤلفون: | Akrap, A., Tu, J. J., Li, L. J., Cao, G. H., Xu, X. A., Homes, C. C. |
| المصدر: | Phys. Rev. B 80, 180502(R) (2009) |
| سنة النشر: | 2009 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Superconductivity |
| الوصف: | The detailed optical properties of BaFe2As2 have been determined over a wide frequency range above and below the structural and magnetic transition at T_N = 138 K. A prominent in-plane infrared-active mode is observed at 253 cm^{-1} (31.4 meV) at 295 K. The frequency of this vibration shifts discontinuously at T_N; for T < T_N the frequency of this mode displays almost no temperature dependence, yet it nearly doubles in intensity. This anomalous behavior appears to be a consequence of orbital ordering in the Fe-As layers. Comment: 4 pages, 3 figures and one table (minor revisions) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.80.180502 |
| URL الوصول: | http://arxiv.org/abs/0910.1565 |
| رقم الأكسشن: | edsarx.0910.1565 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.80.180502 |
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