Iron isotope effect in SmFeAsO0.65 and SmFeAsO0.77H0.12 superconductors: A Raman study
Source abstract
Abstract
We report the inelastic light scattering studies on SmFeAsO0.65 and SmFeAsO0.77H0.12 with iron isotopes namely 54Fe and 57Fe. In both of these systems under investigation we observed a significant shift in the frequency of the phonon modes associated with the displacement of Fe atoms around ∼ 200 cm-1. The observed shift in the Fe mode (B1g) for SmFeAsO0.65 is ∼ 1.4 % and lower in case of SmFeAsO0.77H0.12, which is ∼ 0.65 %, attributed to the lower percentage of isotopic substitution in case of SmFeAsO0.77H0.12. Our study reveals the significant iron isotope effect in these systems hinting towards the crucial role of electron-phonon coupling in the pairing mechanism of iron based superconductors.
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Research context
OpenAlex topics: Iron-based superconductors research
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Affiliations
Indian Institute of Technology Mandi 1 School of Basic Sciences, , Mandi 175005, India
Indian Institute of Technology Indore 2 Metallurgy Engineering and Materials Science & Physics, , Indore 453552, India
National Institute of Advanced Industrial Science and Technology 3 , Tsukuba, Ibaraki 305-8568, Japan
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