Raman scattering study of the lattice dynamics of superconducting LiFeAs

Y. J. Um; J. T. Park; B. H. Min; Y. J. Song; Y. S. Kwon; B. Keimer; M. Le Tacon

doi:10.1103/PhysRevB.85.012501

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Raman scattering study of the lattice dynamics of superconducting LiFeAs

Y. J. Um, J. T. Park, B. H. Min, Y. J. Song, Y. S. Kwon, B. Keimer, M. Le Tacon

DOI 10.1103/PhysRevB.85.012501 · Physical Review B

T1

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Abstract

We report an investigation of the lattice dynamical properties of LiFeAs using inelastic light scattering. Five of the six expected phonon modes are observed. The temperature evolution of their frequencies and linewidths is in good agreement with an anharmonic-decay model. We find no evidence for substantial electron-phonon coupling, and no superconductivity-induced phonon anomalies.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
LiFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	18	Pressure unresolved	unknown
LaFeAsO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	26	Pressure not reported	unknown