Superconductivity close to magnetic instability in Fe(Se 1-xTex)0.82

M. H. Fang, H. M. Pham, B. Qian, T. J. Liu, E. K. Vehstedt, Ying Liu, L. Spinu, Zhiqiang Mao

Research output: Contribution to journalArticle

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Abstract

We report our study of the evolution of superconductivity and the phase diagram of the ternary Fe(Se1-xTex)0.82 (0≤x≤1.0) system. We discovered a superconducting phase with T c,max=14 K in the 0.3<x<1.0 range. This superconducting phase is suppressed when the sample composition approaches the end member FeTe 0.82, which exhibits an incommensurate antiferromagnetic order. We discuss the relationship between the superconductivity and magnetism of this material system in terms of recent results from neutron-scattering measurements. Our results and analyses suggest that superconductivity in this class of Fe-based compounds is associated with magnetic fluctuations and therefore may be unconventional in nature.

Original languageEnglish (US)
Article number224503
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number22
DOIs
StatePublished - Dec 1 2008

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Superconductivity
superconductivity
Magnetism
Neutron scattering
Phase diagrams
neutron scattering
phase diagrams
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Fang, M. H. ; Pham, H. M. ; Qian, B. ; Liu, T. J. ; Vehstedt, E. K. ; Liu, Ying ; Spinu, L. ; Mao, Zhiqiang. / Superconductivity close to magnetic instability in Fe(Se 1-xTex)0.82. In: Physical Review B - Condensed Matter and Materials Physics. 2008 ; Vol. 78, No. 22.
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Superconductivity close to magnetic instability in Fe(Se 1-xTex)0.82. / Fang, M. H.; Pham, H. M.; Qian, B.; Liu, T. J.; Vehstedt, E. K.; Liu, Ying; Spinu, L.; Mao, Zhiqiang.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 22, 224503, 01.12.2008.

Research output: Contribution to journalArticle

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AU - Spinu, L.

AU - Mao, Zhiqiang

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AB - We report our study of the evolution of superconductivity and the phase diagram of the ternary Fe(Se1-xTex)0.82 (0≤x≤1.0) system. We discovered a superconducting phase with T c,max=14 K in the 0.30.82, which exhibits an incommensurate antiferromagnetic order. We discuss the relationship between the superconductivity and magnetism of this material system in terms of recent results from neutron-scattering measurements. Our results and analyses suggest that superconductivity in this class of Fe-based compounds is associated with magnetic fluctuations and therefore may be unconventional in nature.

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