Substitution Effects on FeSe Superconductor

Abstract

We have investigated the effect of atomic substitutions in the FeSe system, which exhibits the simplest crystal structure among the iron-based superconductors. An enhancement of the superconducting transition temperature Tc was observed with the substitution of S or Te for Se; the Tc increased with S substitution by up to 20 %, and also increased with Te substitution up to 75 %. In contrast, Co or Ni substitutions for the Fe site significantly suppressed superconductivity. In this work we present a detailed description of the substitution technique employed to determine Tc in the FeSe system.

17 pages, 15 figures, 1 table

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Cited by in corpus (5)

• Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
• Fabrication of the iron-based superconducting wire using Fe(Se, Te)
• Successive phase transitions under high pressure in FeTe0.92
• Neutron scattering patterns show Superconductivity in FeTe0.5Se0.5 likely results from itinerant electron fluctuations
• Superconductivity and Antiferromagnetism In Fe(Te1-xSx)y System