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arXiv · 0807.2284

Raman scattering study of (K$_x$Sr$_{1-x}$)Fe$_2$As$_2$ ($x$ = 0.0, 0.4)

A. P. Litvinchuk·V. G. Hadjiev·M. N. Iliev·Bing Lv·A. M. Guloy·C. W. Chu
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Abstract

Polarized Raman spectra of non-superconducting SrFe$_2$As$_2$ and superconducting K$_{0.4}$Sr$_{0.6}$Fe$_2$As$_2$ ($T_c = 37$ K) are reported. All four phonon modes (A$_{1g}$ + B$_{1g}$ + 2E$_g$) allowed by symmetry, are found and identified. Shell model gives reasonable description of the spectra. No detectable anomalies are observed near the tetragonal-to-orthorhombic transition in SrFe$_2$As$_2$ or the superconducting transition in K$_{0.4}$Sr$_{0.6}$Fe$_2$As$_2$.

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A. P. Litvinchuk, V. G. Hadjiev, M. N. Iliev, Bing Lv, A. M. Guloy, C. W. Chu. 2008-07-14. Raman scattering study of (K$_x$Sr$_{1-x}$)Fe$_2$As$_2$ ($x$ = 0.0, 0.4). https://doi.org/10.1103/physrevb.78.060503

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