Nodal Spin Density Wave and band topology of the FeAs based materials

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dc.creatorRan, Ying
dc.creatorWang, Fa
dc.creatorZhai, Hui
dc.creatorVishwanath, Ashvin
dc.creatorLee, Dung-Hai
dc.date2008-05-23
dc.date2009-03-15
dc.date.accessioned2026-07-07T12:52:06Z
dc.date.available2026-07-07T12:52:06Z
dc.descriptionThe recently discovered FeAs-based materials exhibit a $(π,0)$ Spin Density Wave (SDW) in the undoped state, which gives way to superconductivity upon doping. Here we show that due to an interesting topological feature of the band structure, the SDW state cannot acquire a full gap. This is demonstrated within the SDW mean-field theory of both a simplified two band model and a more realistic 5-band model. The positions of the nodes are different in the two models and can be used to detected the validity of each model.
dc.descriptionrewritten for clarity
dc.identifierhttps://arxiv.org/abs/0805.3535
dc.identifierhttp://arxiv.org/abs/0805.3535
dc.identifierPhys. Rev. B 79, 014505 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.014505
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/223197
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleNodal Spin Density Wave and band topology of the FeAs based materials
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