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Article: Theory for superconductivity in iron pnictides at large Coulomb U limit
Title | Theory for superconductivity in iron pnictides at large Coulomb U limit | ||||||
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Authors | |||||||
Keywords | Iron-based superconductor Strong coupling theory | ||||||
Issue Date | 2009 | ||||||
Publisher | Higher Education Press and Springer-Verlag GmbH. The Journal's web site is located at http://www.springerlink.com/content/1673-3487/ | ||||||
Citation | Frontiers Of Physics In China, 2009, v. 4 n. 4, p. 447-454 How to Cite? | ||||||
Abstract | Superconductivity in iron pnictides is studied by using a two-orbital Hubbard model in the large U limit. The Coulomb repulsion induces an orbital-dependent pairing between charge carriers. The pairing is found mainly from the scattering within the same Fermi pocket where usually one single orbital dominates. The inter-pocket pair scatterings determine the symmetry of the singlet superconductivity, which is an extended s-wave at small Hund's coupling, and d-wave at large Hund's coupling and large U. The former is consistent with recent experiments of ARPES and Andreev reflection spectroscopy. Spin triplet states only become important at large exchange interaction J. © Higher Education Press and Springer-Verlag 2009. | ||||||
Persistent Identifier | http://hdl.handle.net/10722/125285 | ||||||
ISSN | 2012 Impact Factor: 1.444 | ||||||
ISI Accession Number ID |
Funding Information: We wish to acknowledge the partial support from the RGC grant of IIKSAR and from the Swiss National Foundation through the MANEP network. | ||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chen, WQ | en_HK |
dc.contributor.author | Yang, KY | en_HK |
dc.contributor.author | Zhou, Y | en_HK |
dc.contributor.author | Zhang, FC | en_HK |
dc.date.accessioned | 2010-10-31T11:22:15Z | - |
dc.date.available | 2010-10-31T11:22:15Z | - |
dc.date.issued | 2009 | en_HK |
dc.identifier.citation | Frontiers Of Physics In China, 2009, v. 4 n. 4, p. 447-454 | en_HK |
dc.identifier.issn | 1673-3487 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/125285 | - |
dc.description.abstract | Superconductivity in iron pnictides is studied by using a two-orbital Hubbard model in the large U limit. The Coulomb repulsion induces an orbital-dependent pairing between charge carriers. The pairing is found mainly from the scattering within the same Fermi pocket where usually one single orbital dominates. The inter-pocket pair scatterings determine the symmetry of the singlet superconductivity, which is an extended s-wave at small Hund's coupling, and d-wave at large Hund's coupling and large U. The former is consistent with recent experiments of ARPES and Andreev reflection spectroscopy. Spin triplet states only become important at large exchange interaction J. © Higher Education Press and Springer-Verlag 2009. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Higher Education Press and Springer-Verlag GmbH. The Journal's web site is located at http://www.springerlink.com/content/1673-3487/ | en_HK |
dc.relation.ispartof | Frontiers of Physics in China | en_HK |
dc.rights | The original publication is available at www.springerlink.com | - |
dc.subject | Iron-based superconductor | en_HK |
dc.subject | Strong coupling theory | en_HK |
dc.title | Theory for superconductivity in iron pnictides at large Coulomb U limit | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1673-3487&volume=4&issue=4&spage=447&epage=454&date=2009&atitle=Theory+for+superconductivity+in+iron+pnictides+at+large+Coulomb+U+limit | - |
dc.identifier.email | Chen, WQ: wqchen@hku.hk | en_HK |
dc.identifier.email | Zhang, FC: fuchun@hkucc.hku.hk | en_HK |
dc.identifier.authority | Chen, WQ=rp00673 | en_HK |
dc.identifier.authority | Zhang, FC=rp00840 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1007/s11467-009-0041-7 | en_HK |
dc.identifier.scopus | eid_2-s2.0-70350627107 | en_HK |
dc.identifier.hkuros | 182055 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-70350627107&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 4 | en_HK |
dc.identifier.issue | 4 | en_HK |
dc.identifier.spage | 447 | en_HK |
dc.identifier.epage | 454 | en_HK |
dc.identifier.isi | WOS:000280414200003 | - |
dc.publisher.place | China | en_HK |
dc.identifier.scopusauthorid | Chen, WQ=36077405600 | en_HK |
dc.identifier.scopusauthorid | Yang, KY=7404291063 | en_HK |
dc.identifier.scopusauthorid | Zhou, Y=8862218900 | en_HK |
dc.identifier.scopusauthorid | Zhang, FC=14012468800 | en_HK |
dc.identifier.citeulike | 4784181 | - |
dc.identifier.issnl | 1673-3487 | - |