Modified magnetism within the coherence volume of superconducting Fe1+δ Sex Te1-x

J. Leiner, V. Thampy, A. D. Christianson, D. L. Abernathy, M. B. Stone, M. D. Lumsden, A. S. Sefat, B. C. Sales, Jin Hu, Zhiqiang Mao, Wei Bao, C. Broholm

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Neutron scattering is used to probe magnetic interactions as superconductivity develops in optimally doped Fe1+δSexTe1-x. Applying the first moment sum rule to comprehensive neutron scattering data, we extract the change in magnetic exchange energy Δ[JR-R′(SR·SR′)] in the superconducting state referenced to the normal state. Oscillatory changes are observed for Fe-Fe displacements |ΔR|<ξ, where ξ=1.3(1) nm is the superconducting coherence length. Dominated by a large reduction in the second nearest neighbor exchange energy [-1.2(2) meV/Fe], the overall reduction in magnetic interaction energy is Δ(Hmag)=-0.31(9) meV/Fe. Comparison to the superconducting condensation energy ΔESC=-0.013(1) meV/Fe, which we extract from specific heat data, suggests the modified magnetism we probe drives superconductivity in Fe1+δSexTe1-x.

Original languageEnglish (US)
Article number100501
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number10
DOIs
StatePublished - Sep 2 2014

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Magnetism
Neutron scattering
Superconductivity
neutron scattering
superconductivity
energy transfer
magnetic probes
sum rules
Specific heat
Condensation
Ion exchange
condensation
specific heat
interactions
moments
energy
probes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Leiner, J., Thampy, V., Christianson, A. D., Abernathy, D. L., Stone, M. B., Lumsden, M. D., ... Broholm, C. (2014). Modified magnetism within the coherence volume of superconducting Fe1+δ Sex Te1-x. Physical Review B - Condensed Matter and Materials Physics, 90(10), [100501]. https://doi.org/10.1103/PhysRevB.90.100501
Leiner, J. ; Thampy, V. ; Christianson, A. D. ; Abernathy, D. L. ; Stone, M. B. ; Lumsden, M. D. ; Sefat, A. S. ; Sales, B. C. ; Hu, Jin ; Mao, Zhiqiang ; Bao, Wei ; Broholm, C. / Modified magnetism within the coherence volume of superconducting Fe1+δ Sex Te1-x. In: Physical Review B - Condensed Matter and Materials Physics. 2014 ; Vol. 90, No. 10.
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abstract = "Neutron scattering is used to probe magnetic interactions as superconductivity develops in optimally doped Fe1+δSexTe1-x. Applying the first moment sum rule to comprehensive neutron scattering data, we extract the change in magnetic exchange energy Δ[JR-R′(SR·SR′)] in the superconducting state referenced to the normal state. Oscillatory changes are observed for Fe-Fe displacements |ΔR|<ξ, where ξ=1.3(1) nm is the superconducting coherence length. Dominated by a large reduction in the second nearest neighbor exchange energy [-1.2(2) meV/Fe], the overall reduction in magnetic interaction energy is Δ(Hmag)=-0.31(9) meV/Fe. Comparison to the superconducting condensation energy ΔESC=-0.013(1) meV/Fe, which we extract from specific heat data, suggests the modified magnetism we probe drives superconductivity in Fe1+δSexTe1-x.",
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Leiner, J, Thampy, V, Christianson, AD, Abernathy, DL, Stone, MB, Lumsden, MD, Sefat, AS, Sales, BC, Hu, J, Mao, Z, Bao, W & Broholm, C 2014, 'Modified magnetism within the coherence volume of superconducting Fe1+δ Sex Te1-x', Physical Review B - Condensed Matter and Materials Physics, vol. 90, no. 10, 100501. https://doi.org/10.1103/PhysRevB.90.100501

Modified magnetism within the coherence volume of superconducting Fe1+δ Sex Te1-x. / Leiner, J.; Thampy, V.; Christianson, A. D.; Abernathy, D. L.; Stone, M. B.; Lumsden, M. D.; Sefat, A. S.; Sales, B. C.; Hu, Jin; Mao, Zhiqiang; Bao, Wei; Broholm, C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 10, 100501, 02.09.2014.

Research output: Contribution to journalArticle

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T1 - Modified magnetism within the coherence volume of superconducting Fe1+δ Sex Te1-x

AU - Leiner, J.

AU - Thampy, V.

AU - Christianson, A. D.

AU - Abernathy, D. L.

AU - Stone, M. B.

AU - Lumsden, M. D.

AU - Sefat, A. S.

AU - Sales, B. C.

AU - Hu, Jin

AU - Mao, Zhiqiang

AU - Bao, Wei

AU - Broholm, C.

PY - 2014/9/2

Y1 - 2014/9/2

N2 - Neutron scattering is used to probe magnetic interactions as superconductivity develops in optimally doped Fe1+δSexTe1-x. Applying the first moment sum rule to comprehensive neutron scattering data, we extract the change in magnetic exchange energy Δ[JR-R′(SR·SR′)] in the superconducting state referenced to the normal state. Oscillatory changes are observed for Fe-Fe displacements |ΔR|<ξ, where ξ=1.3(1) nm is the superconducting coherence length. Dominated by a large reduction in the second nearest neighbor exchange energy [-1.2(2) meV/Fe], the overall reduction in magnetic interaction energy is Δ(Hmag)=-0.31(9) meV/Fe. Comparison to the superconducting condensation energy ΔESC=-0.013(1) meV/Fe, which we extract from specific heat data, suggests the modified magnetism we probe drives superconductivity in Fe1+δSexTe1-x.

AB - Neutron scattering is used to probe magnetic interactions as superconductivity develops in optimally doped Fe1+δSexTe1-x. Applying the first moment sum rule to comprehensive neutron scattering data, we extract the change in magnetic exchange energy Δ[JR-R′(SR·SR′)] in the superconducting state referenced to the normal state. Oscillatory changes are observed for Fe-Fe displacements |ΔR|<ξ, where ξ=1.3(1) nm is the superconducting coherence length. Dominated by a large reduction in the second nearest neighbor exchange energy [-1.2(2) meV/Fe], the overall reduction in magnetic interaction energy is Δ(Hmag)=-0.31(9) meV/Fe. Comparison to the superconducting condensation energy ΔESC=-0.013(1) meV/Fe, which we extract from specific heat data, suggests the modified magnetism we probe drives superconductivity in Fe1+δSexTe1-x.

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