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Article: Vortex states in iron-based superconductors with collinear antiferromagnetic cores

TitleVortex states in iron-based superconductors with collinear antiferromagnetic cores
Authors
KeywordsPhysics
Issue Date2009
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2009, v. 80 n. 13 How to Cite?
AbstractMagnetism in the FeAs stoichiometric compounds and its interplay with superconductivity in vortex states are studied by self-consistently solving the Bogoliubov-de Gennes equations based on a two-orbital model with including the on-site interactions between electrons in the two orbitals. It is revealed that for the parent compound, magnetism is caused by the strong Hund's coupling, and the Fermi-surface topology aids to select the spin-density-wave (SDW) pattern. The superconducting (SC) order parameter with s± = Δ0 cos (kx) cos (ky) symmetry is found to be the most favorable pairing for both the electron- and hole-doped cases while the local density of states exhibits the characteristic of nodal gap for the former and full gap for the latter. In the vortex state, the emergence of the field-induced SDW depends on the strength of the Hund's coupling and the Coulomb repulsions. The field-induced SDW gaps the finite-energy contours on the electron- and hole-pocket sides, leading to the dual structures with one reflecting the SC pairing and the other being related to the SDW order. These features can be discernable in STM measurements for identifying the interplay between the field-induced SDW order and the SC order around the core region. © 2009 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/80586
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China10525415
10904062
Ministry of Science and Technology of Science2006CB601002
2006CB921800
GRF grant of Hong KongHKU7055/09P
China Postdoctoral Science Foundation20080441039
Jiangsu Planned Projects for Postdoctoral Research Funds0801008C
Funding Information:

This project was supported by National Natural Science Foundation of China (Grants No. 10525415 and No. 10904062), the Ministry of Science and Technology of Science (Grants No. 2006CB601002 and 2006CB921800), a GRF grant of Hong Kong (Grant No. HKU7055/09P), the China Postdoctoral Science Foundation (Grant No. 20080441039), and the Jiangsu Planned Projects for Postdoctoral Research Funds (Grant No. 0801008C).

References

 

DC FieldValueLanguage
dc.contributor.authorJiang, HMen_HK
dc.contributor.authorLi, JXen_HK
dc.contributor.authorWang, ZDen_HK
dc.date.accessioned2010-09-06T08:08:04Z-
dc.date.available2010-09-06T08:08:04Z-
dc.date.issued2009en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2009, v. 80 n. 13en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80586-
dc.description.abstractMagnetism in the FeAs stoichiometric compounds and its interplay with superconductivity in vortex states are studied by self-consistently solving the Bogoliubov-de Gennes equations based on a two-orbital model with including the on-site interactions between electrons in the two orbitals. It is revealed that for the parent compound, magnetism is caused by the strong Hund's coupling, and the Fermi-surface topology aids to select the spin-density-wave (SDW) pattern. The superconducting (SC) order parameter with s± = Δ0 cos (kx) cos (ky) symmetry is found to be the most favorable pairing for both the electron- and hole-doped cases while the local density of states exhibits the characteristic of nodal gap for the former and full gap for the latter. In the vortex state, the emergence of the field-induced SDW depends on the strength of the Hund's coupling and the Coulomb repulsions. The field-induced SDW gaps the finite-energy contours on the electron- and hole-pocket sides, leading to the dual structures with one reflecting the SC pairing and the other being related to the SDW order. These features can be discernable in STM measurements for identifying the interplay between the field-induced SDW order and the SC order around the core region. © 2009 The American Physical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsPhysical Review B: Condensed Matter and Materials Physics. Copyright © American Physical Society.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPhysics-
dc.titleVortex states in iron-based superconductors with collinear antiferromagnetic coresen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=80&issue=13 article no. 134505&spage=&epage=&date=2009&atitle=Vortex+states+in+iron-based+superconductors+with+collinear+antiferromagnetic+coresen_HK
dc.identifier.emailWang, ZD: zwang@hkucc.hku.hken_HK
dc.identifier.authorityWang, ZD=rp00802en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevB.80.134505en_HK
dc.identifier.scopuseid_2-s2.0-70749154715en_HK
dc.identifier.hkuros169460en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70749154715&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume80en_HK
dc.identifier.issue13en_HK
dc.identifier.isiWOS:000271351300084-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridJiang, HM=14013285400en_HK
dc.identifier.scopusauthoridLi, JX=8678926100en_HK
dc.identifier.scopusauthoridWang, ZD=14828459100en_HK

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