Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron Scattering
We report inelastic neutron scattering measurements of the magnetic excitations in SrFe2As2, the parent of a family of iron-based superconductors. The data extend throughout the Brillouin zone and up to energies of ~260meV. An analysis with the local-moment J_1-J2 model implies very different in-pla...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Published: |
2010
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| _version_ | 1826298148464623616 |
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| author | Ewings, R Perring, T Gillett, J Das, S Sebastian, SE Taylor, A Guidi, T Boothroyd, A |
| author_facet | Ewings, R Perring, T Gillett, J Das, S Sebastian, SE Taylor, A Guidi, T Boothroyd, A |
| author_sort | Ewings, R |
| collection | OXFORD |
| description | We report inelastic neutron scattering measurements of the magnetic excitations in SrFe2As2, the parent of a family of iron-based superconductors. The data extend throughout the Brillouin zone and up to energies of ~260meV. An analysis with the local-moment J_1-J2 model implies very different in-plane nearest-neighbor exchange parameters along the $a$ and $b$ directions, both in the orthorhombic and tetragonal phases. However, the spectrum calculated from the J1-J2 model deviates significantly from our data. We show that the qualitative features that cannot be described by the J1-J2 model are readily explained by calculations from a 5-band itinerant mean-field model. |
| first_indexed | 2024-03-07T04:42:26Z |
| format | Journal article |
| id | oxford-uuid:d21b67d3-be32-46cb-a343-90075465f7f7 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:42:26Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:d21b67d3-be32-46cb-a343-90075465f7f72022-03-27T08:01:33ZItinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron ScatteringJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d21b67d3-be32-46cb-a343-90075465f7f7Symplectic Elements at Oxford2010Ewings, RPerring, TGillett, JDas, SSebastian, SETaylor, AGuidi, TBoothroyd, AWe report inelastic neutron scattering measurements of the magnetic excitations in SrFe2As2, the parent of a family of iron-based superconductors. The data extend throughout the Brillouin zone and up to energies of ~260meV. An analysis with the local-moment J_1-J2 model implies very different in-plane nearest-neighbor exchange parameters along the $a$ and $b$ directions, both in the orthorhombic and tetragonal phases. However, the spectrum calculated from the J1-J2 model deviates significantly from our data. We show that the qualitative features that cannot be described by the J1-J2 model are readily explained by calculations from a 5-band itinerant mean-field model. |
| spellingShingle | Ewings, R Perring, T Gillett, J Das, S Sebastian, SE Taylor, A Guidi, T Boothroyd, A Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron Scattering |
| title | Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron
Scattering |
| title_full | Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron
Scattering |
| title_fullStr | Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron
Scattering |
| title_full_unstemmed | Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron
Scattering |
| title_short | Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron
Scattering |
| title_sort | itinerant spin excitations in srfe2as2 measured by inelastic neutron scattering |
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