Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, J. T. | - |
dc.contributor.author | Friemel, G. | - |
dc.contributor.author | Loew, T. | - |
dc.contributor.author | Hinkov, V. | - |
dc.contributor.author | Li, Yuan | - |
dc.contributor.author | Min, B. H. | - |
dc.contributor.author | Sun, D. L. | - |
dc.contributor.author | Ivanov, A. | - |
dc.contributor.author | Piovano, A. | - |
dc.contributor.author | Lin, C. T. | - |
dc.contributor.author | Keimer, B. | - |
dc.contributor.author | Kwon, Y. S. | - |
dc.contributor.author | Inosov, D. S. | - |
dc.date.available | 2017-07-11T06:54:31Z | - |
dc.date.created | 2017-04-10 | - |
dc.date.issued | 2012-07 | - |
dc.identifier.citation | Physical Review B, v.86, no.2 | - |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/3352 | - |
dc.description.abstract | We report results of inelastic-neutron-scattering measurements of low-energy spin-wave excitations in two structurally distinct families of iron-pnictide parent compounds: Na 1-δFeAs and BaFe 2As 2. Despite their very different values of the ordered magnetic moment and Néel temperatures, T N, in the antiferromagnetic state both compounds exhibit similar spin gaps of the order of 10 meV at the magnetic Brillouin-zone center. The gap opens sharply below T N, with no signatures of a precursor gap at temperatures between the orthorhombic and magnetic phase transitions in Na 1-δFeAs. We also find a relatively weak dispersion of the spin-wave gap in BaFe 2As 2 along the out-of-plane momentum component, q z. At the magnetic zone boundary (q z=0), spin excitations in the ordered state persist down to ∼20 meV, which implies a much smaller value of the effective out-of-plane exchange interaction, J c, as compared to previous estimates based on fitting the high-energy spin-wave dispersion to a Heisenberg-type model. © 2012 American Physical Society. | - |
dc.language | English | - |
dc.publisher | American Physical Society | - |
dc.title | Similar zone-center gaps in the low-energy spin-wave spectra of Na1-delta FeAs and BaFe2As2 | - |
dc.type | Article | - |
dc.identifier.doi | 10.1103/PhysRevB.86.024437 | - |
dc.identifier.wosid | 000306923100005 | - |
dc.identifier.scopusid | 2-s2.0-84864449287 | - |
dc.type.local | Article(Overseas) | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.citation.publicationname | Physical Review B | - |
dc.contributor.nonIdAuthor | Park, J. T. | - |
dc.contributor.nonIdAuthor | Friemel, G. | - |
dc.contributor.nonIdAuthor | Loew, T. | - |
dc.contributor.nonIdAuthor | Hinkov, V. | - |
dc.contributor.nonIdAuthor | Li, Yuan | - |
dc.contributor.nonIdAuthor | Min, B. H. | - |
dc.contributor.nonIdAuthor | Sun, D. L. | - |
dc.contributor.nonIdAuthor | Ivanov, A. | - |
dc.contributor.nonIdAuthor | Piovano, A. | - |
dc.contributor.nonIdAuthor | Lin, C. T. | - |
dc.contributor.nonIdAuthor | Keimer, B. | - |
dc.contributor.nonIdAuthor | Inosov, D. S. | - |
dc.identifier.citationVolume | 86 | - |
dc.identifier.citationNumber | 2 | - |
dc.identifier.citationTitle | Physical Review B | - |
dc.type.journalArticle | Article | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Park, J. T. | - |
dc.contributor.affiliatedAuthor | Friemel, G. | - |
dc.contributor.affiliatedAuthor | Loew, T. | - |
dc.contributor.affiliatedAuthor | Hinkov, V. | - |
dc.contributor.affiliatedAuthor | Li, Yuan | - |
dc.contributor.affiliatedAuthor | Min, B. H. | - |
dc.contributor.affiliatedAuthor | Sun, D. L. | - |
dc.contributor.affiliatedAuthor | Ivanov, A. | - |
dc.contributor.affiliatedAuthor | Piovano, A. | - |
dc.contributor.affiliatedAuthor | Lin, C. T. | - |
dc.contributor.affiliatedAuthor | Keimer, B. | - |
dc.contributor.affiliatedAuthor | Kwon, Y. S. | - |
dc.contributor.affiliatedAuthor | Inosov, D. S. | - |
There are no files associated with this item.