TY - JOUR
T1 - Soft-phonon-driven superconductivity in CaAlSi as seen by inelastic x-ray scattering
AU - Kuroiwa, S.
AU - Baron, A. Q.R.
AU - Muranaka, T.
AU - Heid, R.
AU - Bohnen, K. P.
AU - Akimitsu, J.
PY - 2008/4/7
Y1 - 2008/4/7
N2 - 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 6̄ m2). A soft c -axis polarized mode is clearly observed along the Γ-A-L symmetry directions. The soft mode is strongly anharmonically broadened at room temperature, but at 10 K, its linewidth narrows and comes in good agreement with calculations of linear electron-phonon coupling. This establishes a coherent description of the detailed phonon properties into this system and links them clearly and consistently with the superconductivity.
AB - 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 6̄ m2). A soft c -axis polarized mode is clearly observed along the Γ-A-L symmetry directions. The soft mode is strongly anharmonically broadened at room temperature, but at 10 K, its linewidth narrows and comes in good agreement with calculations of linear electron-phonon coupling. This establishes a coherent description of the detailed phonon properties into this system and links them clearly and consistently with the superconductivity.
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U2 - 10.1103/PhysRevB.77.140503
DO - 10.1103/PhysRevB.77.140503
M3 - Article
AN - SCOPUS:42049105835
SN - 1098-0121
VL - 77
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 14
M1 - 140503
ER -