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

J. Liu, A.T. Savici, G.E. Granroth, K. Habicht, Y. Qiu, J. Hu, Z.Q. Mao, W. Bao

Research output: Contribution to journalArticle

Abstract

From heavy fermion compounds and cuprates to iron pnictides and chalcogenides, a spin resonance at \ \ \κBTc 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.
Original languageEnglish
JournalChinese Physics Letters
Volume35
Issue number12
DOIs
StatePublished - 2018

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spin resonance
Group 5A compounds
chalcogenides
cuprates
inelastic scattering
neutron scattering
fermions
damping
signatures
iron
magnetic fields

Cite this

Liu, J. ; Savici, A.T. ; Granroth, G.E. ; Habicht, K. ; Qiu, Y. ; Hu, J. ; Mao, Z.Q. ; Bao, W. / A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6. In: Chinese Physics Letters. 2018 ; Vol. 35, No. 12.
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A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6. / Liu, J.; Savici, A.T.; Granroth, G.E.; Habicht, K.; Qiu, Y.; Hu, J.; Mao, Z.Q.; Bao, W.

In: Chinese Physics Letters, Vol. 35, No. 12, 2018.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Liu, J.

AU - Savici, A.T.

AU - Granroth, G.E.

AU - Habicht, K.

AU - Qiu, Y.

AU - Hu, J.

AU - Mao, Z.Q.

AU - Bao, W.

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AB - From heavy fermion compounds and cuprates to iron pnictides and chalcogenides, a spin resonance at \ \ \κBTc 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.

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