Iron-based layered superconductor LaO$_{1-x}$F$_x$FeAs: an antiferromagnetic semimetal
| dc.creator | Ma, Fengjie | |
| dc.creator | Lu, Zhong-Yi | |
| dc.date | 2008-03-22 | |
| dc.date.accessioned | 2026-07-07T09:53:53Z | |
| dc.date.available | 2026-07-07T09:53:53Z | |
| dc.description | We have studied the newly found superconductor compound LaO$_{1-x}$F$_x$FeAs through the first-principles density functional theory calculations. We find that the parent compound LaOFeAs is a quasi-2-dimensional antiferromgnetic semimetal with most carriers being electrons and with a magnetic moment of $2.3μ_B$ located around each Fe atom on the Fe-Fe square lattice. Furthermore this is a commensurate antiferromagnetic spin density wave due to the Fermi surface nesting, which is robust against the F-doping. The observed superconduction happens on the Fe-Fe antiferromagnetic layer, suggesting a new superconductivity mechanism, mediated by the spin fluctuations. An abrupt change on the Hall measurement is further predicted for the parent compound LaOFeAs. | |
| dc.description | 4 pages, 7 figures | |
| dc.identifier | https://arxiv.org/abs/0803.3286 | |
| dc.identifier | http://arxiv.org/abs/0803.3286 | |
| dc.identifier | Phys. Rev. B 78, 033111 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.033111 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/166113 | |
| dc.subject | Materials Science | |
| dc.subject | Superconductivity | |
| dc.title | Iron-based layered superconductor LaO$_{1-x}$F$_x$FeAs: an antiferromagnetic semimetal | |
| dc.type | text |