Tellurium substitution effect on superconductivity of the α-phase iron selenide
By K. Yeh, Tzu-Wen Huang, Yi-lin Huang, T. Chen, F. Hsu, Phillip M. Wu, Yong-Chi Lee, Y. Chu, Chi-Liang Chen, J. Luo and 2 more. 2008
506 citations recorded by the source corpus.
We have carried out a systematic study of the PbO-type compound FeSe1−xTex (x=0–1), where the Te substitution effect on superconductivity is investigated. It is found that the superconducting transition temperature reaches a maximum of Tc=15.2 K at about 50% Te substitution. The pressure-enhanced Tc of FeSe0.5Te0.5 is more than 10 times larger than that of FeSe. Interestingly, FeTe is no longer superconducting. A low-temperature structural distortion changes FeTe from triclinic symmetry to orthorhombic symmetry. We believe that this structural change breaks the magnetic symmetry and suppresses superconductivity in FeTe.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/f29f94c94b40e6bec5f49f832635f72a7e8f8340
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Citations in the corpus
- Superconductivity in iron compounds (2011, background): “D and Te doping [FeðSe1 xTexÞ] increases almost twofold to 15 K (Yeh et al., 2008), Sec.”
- Colloquium: The unexpected properties of alkali metal iron selenide superconductors (2012, background): “The critical temperature can dramatically increase by Te substitution or even more by pressure up to 37 K (Fang, M. H., et al., 2008 ; Yeh et al., 2008; Margadonna et al., 2009).”
- Novel BiS2-based layered superconductor Bi4O4S3 (2012, background): “To date, over 50 Fe-based superconductors with a layered structure, basically composed of superconducting layers of Fe-pnictogen (Fe2As2 or Fe2P2) or Fe-chalcogen (Fe2Se2 or Fe2Te2) layers and spacer layers, have been discovered.(8-13) As introduced here, discovery of a new layered superconductor pr”