A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Juanjuan Liu (刘娟娟)
  • A. T. Savici
  • G. E. Granroth
  • K. Habicht
  • Y. Qiu (邱义铭)
  • Jin Hu (胡津)
  • Z. Q. Mao (毛志强)

Detail(s)

Original languageEnglish
Article number127401
Journal / PublicationChinese Physics Letters
Volume35
Issue number12
Publication statusPublished - Dec 2018
Externally publishedYes

Abstract

From heavy fermion compounds and cuprates to iron pnictides and chalcogenides, a spin resonance at hΩ0 ∝ 𝑘B𝑇c  is a staple of nearly magnetic superconductors. Possible explanations include a two-particle bound state or loss of magnon damping in the superconducting state. While both scenarios suggest a central role for magnetic fluctuations, distinguishing them is important to identify the right theoretical framework to understand these types of unconventional superconductors. Using an inelastic neutron scattering technique, we show that the spin resonance in the optimally doped Fe1.03Se0.4Te0.6 superconductor splits into three peaks in a high magnetic field, a signature of a two-particle S = 1 triplet bound state.

©2018 Chinese Physical Society and IOP Publishing Ltd

Citation Format(s)

A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6. / Juanjuan Liu (刘娟娟); Savici, A. T.; Granroth, G. E. et al.
In: Chinese Physics Letters, Vol. 35, No. 12, 127401, 12.2018.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review