Inward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4+d
Polarized- and unpolarized-neutron scattering measurements of the spin excitation spectrum in the stripe-ordered phase of La2NiO4+d (d = 0.11) are presented. At low energies, the magnetic spectral weight is found to shift anomalously towards the two-dimensional antiferromagnetic wave vector, similar...
| Main Authors: | , , , , , , , |
|---|---|
| 格式: | Journal article |
| 語言: | English |
| 出版: |
2009
|
| _version_ | 1826294002363662336 |
|---|---|
| author | Freeman, P Hayden, S Frost, C Enderle, M Yao, D Carlson, E Prabhakaran, D Boothroyd, A |
| author_facet | Freeman, P Hayden, S Frost, C Enderle, M Yao, D Carlson, E Prabhakaran, D Boothroyd, A |
| author_sort | Freeman, P |
| collection | OXFORD |
| description | Polarized- and unpolarized-neutron scattering measurements of the spin excitation spectrum in the stripe-ordered phase of La2NiO4+d (d = 0.11) are presented. At low energies, the magnetic spectral weight is found to shift anomalously towards the two-dimensional antiferromagnetic wave vector, similar to the low-energy dispersions observed in cuprate superconductors. While spin-wave spectra in stripe phases can exhibit an apparent inward dispersion, we find that the peak shifts measured here cannot be accounted for by this effect. Possible extensions of the model are discussed. |
| first_indexed | 2024-03-07T03:38:54Z |
| format | Journal article |
| id | oxford-uuid:bd381bbc-039b-4af6-953e-0a5aec81044c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:38:54Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:bd381bbc-039b-4af6-953e-0a5aec81044c2022-03-27T05:30:07ZInward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4+dJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:bd381bbc-039b-4af6-953e-0a5aec81044cEnglishSymplectic Elements at Oxford2009Freeman, PHayden, SFrost, CEnderle, MYao, DCarlson, EPrabhakaran, DBoothroyd, APolarized- and unpolarized-neutron scattering measurements of the spin excitation spectrum in the stripe-ordered phase of La2NiO4+d (d = 0.11) are presented. At low energies, the magnetic spectral weight is found to shift anomalously towards the two-dimensional antiferromagnetic wave vector, similar to the low-energy dispersions observed in cuprate superconductors. While spin-wave spectra in stripe phases can exhibit an apparent inward dispersion, we find that the peak shifts measured here cannot be accounted for by this effect. Possible extensions of the model are discussed. |
| spellingShingle | Freeman, P Hayden, S Frost, C Enderle, M Yao, D Carlson, E Prabhakaran, D Boothroyd, A Inward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4+d |
| title | Inward dispersion of the spin excitation spectrum of stripe-ordered
La2NiO4+d |
| title_full | Inward dispersion of the spin excitation spectrum of stripe-ordered
La2NiO4+d |
| title_fullStr | Inward dispersion of the spin excitation spectrum of stripe-ordered
La2NiO4+d |
| title_full_unstemmed | Inward dispersion of the spin excitation spectrum of stripe-ordered
La2NiO4+d |
| title_short | Inward dispersion of the spin excitation spectrum of stripe-ordered
La2NiO4+d |
| title_sort | inward dispersion of the spin excitation spectrum of stripe ordered la2nio4 d |
| work_keys_str_mv | AT freemanp inwarddispersionofthespinexcitationspectrumofstripeorderedla2nio4d AT haydens inwarddispersionofthespinexcitationspectrumofstripeorderedla2nio4d AT frostc inwarddispersionofthespinexcitationspectrumofstripeorderedla2nio4d AT enderlem inwarddispersionofthespinexcitationspectrumofstripeorderedla2nio4d AT yaod inwarddispersionofthespinexcitationspectrumofstripeorderedla2nio4d AT carlsone inwarddispersionofthespinexcitationspectrumofstripeorderedla2nio4d AT prabhakarand inwarddispersionofthespinexcitationspectrumofstripeorderedla2nio4d AT boothroyda inwarddispersionofthespinexcitationspectrumofstripeorderedla2nio4d |