Spin-wave excitations and superconducting resonant mode in Cs(x)Fe(2-y)Se2
We report neutron inelastic scattering measurements on the normal and superconducting states of single-crystalline Cs0.8Fe1.9Se2. Consistent with previous measurements on Rb(x)Fe(2-y)Se2, we observe two distinct spin excitation signals: (i) spin-wave excitations characteristic of the block antiferro...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2012
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| _version_ | 1826289983418269696 |
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| author | Taylor, A Ewings, R Perring, T White, J Babkevich, P Krzton-Maziopa, A Pomjakushina, E Conder, K Boothroyd, A |
| author_facet | Taylor, A Ewings, R Perring, T White, J Babkevich, P Krzton-Maziopa, A Pomjakushina, E Conder, K Boothroyd, A |
| author_sort | Taylor, A |
| collection | OXFORD |
| description | We report neutron inelastic scattering measurements on the normal and superconducting states of single-crystalline Cs0.8Fe1.9Se2. Consistent with previous measurements on Rb(x)Fe(2-y)Se2, we observe two distinct spin excitation signals: (i) spin-wave excitations characteristic of the block antiferromagnetic order found in insulating A(x)Fe(2-y)Se2 compounds, and (ii) a resonance-like magnetic peak localized in energy at 11 meV and at an in-plane wave vector of (0.25, 0.5). The resonance peak increases below Tc = 27 K, and has a similar absolute intensity to the resonance peaks observed in other Fe-based superconductors. The existence of a magnetic resonance in the spectrum of Rb(x)Fe(2-y)Se2 and now of Cs(x)Fe(2-y)Se2 suggests that this is a common feature of superconductivity in this family. The low energy spin-wave excitations in Cs0.8Fe1.9Se2 show no measurable response to superconductivity, consistent with the notion of spatially separate magnetic and superconducting phases. |
| first_indexed | 2024-03-07T02:37:14Z |
| format | Journal article |
| id | oxford-uuid:a93390ed-7c76-4754-880d-070d880fe47d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:37:14Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:a93390ed-7c76-4754-880d-070d880fe47d2022-03-27T03:06:51ZSpin-wave excitations and superconducting resonant mode in Cs(x)Fe(2-y)Se2Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a93390ed-7c76-4754-880d-070d880fe47dEnglishSymplectic Elements at Oxford2012Taylor, AEwings, RPerring, TWhite, JBabkevich, PKrzton-Maziopa, APomjakushina, EConder, KBoothroyd, AWe report neutron inelastic scattering measurements on the normal and superconducting states of single-crystalline Cs0.8Fe1.9Se2. Consistent with previous measurements on Rb(x)Fe(2-y)Se2, we observe two distinct spin excitation signals: (i) spin-wave excitations characteristic of the block antiferromagnetic order found in insulating A(x)Fe(2-y)Se2 compounds, and (ii) a resonance-like magnetic peak localized in energy at 11 meV and at an in-plane wave vector of (0.25, 0.5). The resonance peak increases below Tc = 27 K, and has a similar absolute intensity to the resonance peaks observed in other Fe-based superconductors. The existence of a magnetic resonance in the spectrum of Rb(x)Fe(2-y)Se2 and now of Cs(x)Fe(2-y)Se2 suggests that this is a common feature of superconductivity in this family. The low energy spin-wave excitations in Cs0.8Fe1.9Se2 show no measurable response to superconductivity, consistent with the notion of spatially separate magnetic and superconducting phases. |
| spellingShingle | Taylor, A Ewings, R Perring, T White, J Babkevich, P Krzton-Maziopa, A Pomjakushina, E Conder, K Boothroyd, A Spin-wave excitations and superconducting resonant mode in Cs(x)Fe(2-y)Se2 |
| title | Spin-wave excitations and superconducting resonant mode in
Cs(x)Fe(2-y)Se2 |
| title_full | Spin-wave excitations and superconducting resonant mode in
Cs(x)Fe(2-y)Se2 |
| title_fullStr | Spin-wave excitations and superconducting resonant mode in
Cs(x)Fe(2-y)Se2 |
| title_full_unstemmed | Spin-wave excitations and superconducting resonant mode in
Cs(x)Fe(2-y)Se2 |
| title_short | Spin-wave excitations and superconducting resonant mode in
Cs(x)Fe(2-y)Se2 |
| title_sort | spin wave excitations and superconducting resonant mode in cs x fe 2 y se2 |
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