Magnetism Driven by Anion Vacancies in Superconducting $α$--FeSe$_{1-x}$
| dc.creator | Lee, K. -W. | |
| dc.creator | Pardo, V. | |
| dc.creator | Pickett, W. E. | |
| dc.date | 2008-08-12 | |
| dc.date | 2008-11-10 | |
| dc.date.accessioned | 2026-07-07T10:16:45Z | |
| dc.date.available | 2026-07-07T10:16:45Z | |
| dc.description | To study the microscopic electronic and magnetic interactions in the substoichiometric iron chalcogenide FeSe$_{1-x}$ which is observed to superconduct at x~1/8 up to $T_c$=27 K, we use first principles methods to study the Se vacancy in this nearly magnetic FeSe system. The vacancy forms a ferrimagnetic cluster of eight Fe atoms, which for the ordered x=1/8 alloy leads to half metallic conduction. Similar magnetic clusters are obtained for FeTe$_{1-x}$ and for BaFe$_2$As$_2$ with an As vacancy, although neither of these are half metallic. Based on fixed spin density results, we suggest the low energy excitations in FeSe$_{1-x}$ are antiparamagnon-like with short correlation length. | |
| dc.description | 6 pages, 5 embedded figures | |
| dc.identifier | https://arxiv.org/abs/0808.1733 | |
| dc.identifier | http://arxiv.org/abs/0808.1733 | |
| dc.identifier | Phys. Rev. B 78, 174502 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.174502 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/173616 | |
| dc.subject | Superconductivity | |
| dc.title | Magnetism Driven by Anion Vacancies in Superconducting $α$--FeSe$_{1-x}$ | |
| dc.type | text |