Phonon anomalies within the polar charge density wave phase of the structurally chiral superconductor MoAlC
arXiv:2502.19826 · doi:10.1103/nkx2-6qyr
Abstract
We employ polarization-resolved Raman spectroscopy to study the lattice dynamics of the polar charge density wave phase of the superconductor MoAlC with structural chirality. We show the phononic signatures of the charge density wave transition at = 155\,K in MoAlC. The detailed temperature dependence of these phonon modes' frequency, half width at half maximum, and integrated area below reveal anomalies at an intermediate temperature 100\,K, especially for the low-energy modes at 130 and 180\,\cm-1. We discuss the origin of these phonon anomalies within the polar charge density wave phase of MoAlC.
arXiv comment10 pages, 6 figures. The supplemental materials are included. Journal version
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