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

doi:10.1103/PhysRevB.78.060503

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

Superconductivity 2008-09-04 v1

Authors: 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 $_2$ .

Keywords

Raman scattering iron-based superconductor phonon modes SrFe2As2 K0.4Sr0.6Fe2As2 tetragonal-to-orthorhombic transition

Cite

@article{arxiv.0807.2284,
  title  = {Raman scattering study of (K$_x$Sr$_{1-x}$)Fe$_2$As$_2$ ($x$ = 0.0, 0.4)},
  author = {A. P. Litvinchuk and V. G. Hadjiev and M. N. Iliev and Bing Lv and A. M. Guloy and C. W. Chu},
  journal= {arXiv preprint arXiv:0807.2284},
  year   = {2008}
}

Comments

4 pages, 4 figures, 2 tables

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