Report
Soft-phonon-driven superconductivity in CaAlSi as seen by inelastic x-ray scattering
| العنوان: | Soft-phonon-driven superconductivity in CaAlSi as seen by inelastic x-ray scattering |
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| المؤلفون: | Kuroiwa, S., Baron, A. Q. R., Muranaka, T., Heid, R., Bohnen, K. -P., Akimitsu, J. |
| سنة النشر: | 2008 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | Inelastic x-ray scattering and $ab$-$initio$ calculation are applied to investigate the lattice dynamics and electron-phonon coupling of the ternary silicide superconductor CaAlSi ($P/bar{6}m2$). A soft c-axis polarized mode is clearly observed along the $/Gamma$-$A$-$L$ symmetry directions. The soft mode is strongly anharmonically broadened at room temperature, but, at 10 K, its linewidth narrows and becomes in good agreement with calculations of linear electron-phonon coupling. This establishes a coherent description of the detailed phonon properties in this system and links them clearly and consistently with the superconductivity. Comment: 4 pages, 4 figures, to be published in Phys. Rev. B (Rapid Communications) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.77.140503 |
| URL الوصول: | http://arxiv.org/abs/0802.2765 |
| رقم الانضمام: | edsarx.0802.2765 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.77.140503 |
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