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Article: Fermi surface nesting and spin density wave instability in the overdoped superconducting iron pnictides

TitleFermi surface nesting and spin density wave instability in the overdoped superconducting iron pnictides
Authors
Issue Date2012
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0295-5075
Citation
EPL (Europhysics Letters), 2012, v. 100 n. 4, article no. 47004:1-5 How to Cite?
AbstractThe nesting of electron Fermi pocket with one of the two hole pockets around the Brillouin zone center has been attributed to the spin density wave (SDW) instability in the parent compound of superconducting iron pnictides. We propose here that the second hole Fermi pocket may be nested with the electron pocket in the doped case, which results in a new SDW instability. Our work is motivated by and may explain the recent scanning tunneling spectroscopy (STM) measurements on NaFe1−xCoxAs, which show an asymmetric gap-like feature near the Fermi level in the overdoped regime (Zhou X. et al., Phys. Rev. Lett., 109 (2012) 037002). We use a multi-band model to examine this feature within random phase approximation to include the coupling between the itinerant electron and the local spins.
Persistent Identifierhttp://hdl.handle.net/10722/225567
ISSN
2015 Impact Factor: 1.963
2015 SCImago Journal Rankings: 0.565

 

DC FieldValueLanguage
dc.contributor.authorJiang, HM-
dc.contributor.authorYao, ZJ-
dc.contributor.authorZhang, FC-
dc.date.accessioned2016-05-19T10:01:15Z-
dc.date.available2016-05-19T10:01:15Z-
dc.date.issued2012-
dc.identifier.citationEPL (Europhysics Letters), 2012, v. 100 n. 4, article no. 47004:1-5-
dc.identifier.issn0295-5075-
dc.identifier.urihttp://hdl.handle.net/10722/225567-
dc.description.abstractThe nesting of electron Fermi pocket with one of the two hole pockets around the Brillouin zone center has been attributed to the spin density wave (SDW) instability in the parent compound of superconducting iron pnictides. We propose here that the second hole Fermi pocket may be nested with the electron pocket in the doped case, which results in a new SDW instability. Our work is motivated by and may explain the recent scanning tunneling spectroscopy (STM) measurements on NaFe1−xCoxAs, which show an asymmetric gap-like feature near the Fermi level in the overdoped regime (Zhou X. et al., Phys. Rev. Lett., 109 (2012) 037002). We use a multi-band model to examine this feature within random phase approximation to include the coupling between the itinerant electron and the local spins.-
dc.languageeng-
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0295-5075-
dc.relation.ispartofEPL (Europhysics Letters)-
dc.rightsEPL (Europhysics Letters). Copyright © Institute of Physics Publishing Ltd.-
dc.titleFermi surface nesting and spin density wave instability in the overdoped superconducting iron pnictides-
dc.typeArticle-
dc.identifier.emailJiang, HM: hmjiang@hku.hk-
dc.identifier.emailYao, ZJ: zjyao@hku.hk-
dc.identifier.emailZhang, FC: fuchun@hkucc.hku.hk-
dc.identifier.authorityYao, ZJ=rp00828-
dc.identifier.authorityZhang, FC=rp00840-
dc.identifier.doi10.1209/0295-5075/100/47004-
dc.identifier.hkuros213463-
dc.identifier.volume100-
dc.identifier.issue4-
dc.identifier.spage47004:1-
dc.identifier.epage47004:5-
dc.publisher.placeUnited Kingdom-

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