Iron Isotope Effect in SmFeAsO0.65 and SmFeAsO0.77H0.12 Superconductors:\n A Raman Study

2016/09/14 by Birender Singh, Singh, Birender, Parasharam M. Shirage +7
Materials Science · #FOS: Physical sciences #Iron-based superconductors research #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.1609.04183

openalex publication_date 2016/09/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report the inelastic light scattering studies on SmFeAsO0.65 and\nSmFeAsO0.77H0.12 with iron isotopes namely 54Fe and 57Fe. In both of these\nsystems under investigation we observed a significant shift in the frequency of\nthe phonon modes associated with the displacement of Fe atoms around ~ 200\ncm-1. The observed shift in the Fe mode (B1g) for SmFeAsO0.65 is ~ 1.4 % and\nlower in case of SmFeAsO0.77H0.12, which is ~ 0.65 %, attributed to the lower\npercentage of isotopic substitution in case of SmFeAsO0.77H0.12. Our study\nreveals the significant iron isotope effect in these systems hinting towards\nthe crucial role of electron-phonon coupling in the pairing mechanism of iron\nbased superconductors.\n

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