تقرير
Phonon anomalies in FeS
| العنوان: | Phonon anomalies in FeS |
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| المؤلفون: | Baum, A., Milosavljević, A., Lazarević, N., Radonjić, M. M., Nikolić, B., Mitschek, M., Maranloo, Z. Inanloo, Šćepanović, M., Grujuić-Brojčin, M., Stojilović, N., Opel, M., Wang, Aifeng, Petrovic, C., Popović, Z. V., Hackl, R. |
| المصدر: | Phys. Rev. B 97, 054306 (2018) |
| سنة النشر: | 2017 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | We present results from light scattering experiments on tetragonal FeS with the focus placed on lattice dynamics. We identify the Raman active A1g and B1g phonon modes, a second order scattering process involving two acoustic phonons, and contributions from potentially defect-induced scattering. The temperature dependence between 300 and 20K of all observed phonon energies is governed by the lattice contraction. Below 20K the phonon energies increase by 0.5-1 cm$^{-1}$ thus indicating putative short range magnetic order. Along with the experiments we performed lattice-dynamical simulations and a symmetry analysis for the phonons and potential overtones and find good agreement with the experiments. In particular, we argue that the two-phonon excitation observed in a gap between the optical branches becomes observable due to significant electron-phonon interaction. Comment: 13 pages, 9 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.97.054306 |
| URL الوصول: | http://arxiv.org/abs/1712.02724 |
| رقم الأكسشن: | edsarx.1712.02724 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.97.054306 |
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