Iron isotope effect in SmFeAsO0.65and SmFeAsO0.77H0.12superconductors: A Raman study | Zendy

Birender Singh | Zendy; Parasharam M. Shirage | Zendy; Akira Iyo | Zendy; Pradeep Kumar | Zendy

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Iron isotope effect in SmFeAsO_0.65and SmFeAsO_0.77H_0.12superconductors: A Raman study

Author(s) -

Birender Singh,

Parasharam M. Shirage,

Akira Iyo,

Pradeep Kumar

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4966256

Subject(s) - superconductivity , isotope , raman spectroscopy , phonon , pairing , kinetic isotope effect , materials science , raman scattering , condensed matter physics , atomic physics , physics , nuclear physics , deuterium , optics

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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