Raman-scattering study ofKxSr1−xFe2As2(x=0.0,0.4)

2008/07/14 by A. P. Litvinchuk, Viktor G. Hadjiev, V. G. Hadjiev +5 · 3 citations
Chemistry · Materials Science · Physics and Astronomy · #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Iron-based superconductors research #Optics #Orthorhombic crystal system #Physics #Physics of Superconductivity and Magnetism #Raman spectroscopy #Rare-earth and actinide compounds #Tetragonal crystal system #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.78.060503

published as Phys. Rev. B 78, 060503R (2008) · 4 pages, 4 figures, 2 tables

arxiv created 2008/07/14 · openalex publication_date 2008/08/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Polarized Raman spectra of nonsuperconducting SrFe₂As₂ and superconducting K_0.4Sr_0.6Fe₂As₂ (T_c=37 K) microcrystals 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 SrFe₂As₂ or the superconducting transition in K_0.4Sr_0.6Fe₂As₂.

Citations

• A BCS-like gap in the superconductor SmFeAsO0.85F0.15
• Normal mode determination in crystals

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