Iron isotope effect on the superconducting transition temperature and the crystal structure of FeSe&lt;sub&gt;1–&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;

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

doi:10.1088/1367-2630/12/7/073024

Iron isotope effect on the superconducting transition temperature and the crystal structure of FeSe_1–x

Khasanov R, Bendele M, Conder K, Keller H, Pomjakushina E & Pomjakushin V

Citation

Khasanov, R., Bendele, M., Conder, K., Keller, H., Pomjakushina, E., & Pomjakushin, V. (2010). Iron isotope effect on the superconducting transition temperature and the crystal structure of FeSe_1–x. New Journal of Physics, 12(7), 073024 (8 pp.). https://doi.org/10.1088/1367-2630/12/7/073024

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:15852

The Fe isotope effect (Fe-IE) on the transition temperature T_c and the crystal structure was studied in the Fe chalcogenide superconductor FeSe_1−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 T_c of 0.22(5) K corresponding to an Fe-IE exponent of α_Fe = 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 T_c.