Iron isotope effect on the superconducting transition temperature and the crystal structure of FeSe<sub>1−<i>x</i></sub>

R. Khasanov, M. Bendele, K. Conder, H. Keller, E. Pomjakushina, Vladimir Pomjakushin

Type: Article

Publication Date: 2010-07-22

Citations: 66

DOI: https://doi.org/10.1088/1367-2630/12/7/073024

Abstract

The Fe isotope effect (Fe-IE) on the transition temperature Tc and the crystal structure was studied in the Fe chalcogenide superconductor FeSe1−x by means of magnetization and neutron powder diffraction (NPD). The substitution of natural Fe (containing ≃92% of 56Fe) by its lighter 54Fe isotope leads to a shift in Tc of 0.22(5) K corresponding to an Fe-IE exponent of αFe=0.81(15). Simultaneously, a small structural change with isotope substitution is observed by NPD, which may contribute to the total Fe isotope shift of Tc.

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New Journal of Physics - View - PDF
arXiv (Cornell University) - View - PDF
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