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Article: Spin fluctuations, interband coupling and unconventional pairing in iron-based superconductors
| Title | Spin fluctuations, interband coupling and unconventional pairing in iron-based superconductors | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Authors | |||||||||||
| Issue Date | 2009 | ||||||||||
| Publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/NJP | ||||||||||
| Citation | New Journal Of Physics, 2009, v. 11 How to Cite? | ||||||||||
| Abstract | Based on an effective two-band model and using the fluctuation-exchange (FLEX) approach, we explore spin fluctuations and unconventional superconducting pairing in Fe-based layer superconductors. It is elaborated that one type of interband antiferromagnetic (AF) spin fluctuation stems from the interband Coulomb repulsion, whereas the other type of intraband AF spin fluctuation originates from the intraband Coulomb repulsion. Due to the Fermi-surface topology, a spin-singlet extended s-wave superconducting state is more favorable than the nodal dXY-wave state if the interband AF spin fluctuation is more significant than the intraband one, otherwise vice versa. It is also revealed that the effective interband coupling plays an important role in the intraband pairings, which is a distinct feature of the present two-band system. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. | ||||||||||
| Persistent Identifier | http://hdl.handle.net/10722/59666 | ||||||||||
| ISSN | 2023 Impact Factor: 2.8 2023 SCImago Journal Rankings: 1.090 | ||||||||||
| ISI Accession Number ID |
Funding Information: We thank F C Zhang, Q Han, Y Chen, X Dai, Z Fang, T K Ng, Q H Wang, H H Wen and S C Zhang for many helpful discussions. The work was supported by the NSFC (10525415 and 10429401), the RGC grants of Hong Kong (HKU-3/05C), the 973 project (2006CB601002, 2006CB921800) and the Ministry of Education of China (grant no. NCET-04-0453). | ||||||||||
| References |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Yao, ZJ | en_HK |
| dc.contributor.author | Li, JX | en_HK |
| dc.contributor.author | Wang, ZD | en_HK |
| dc.date.accessioned | 2010-05-31T03:54:47Z | - |
| dc.date.available | 2010-05-31T03:54:47Z | - |
| dc.date.issued | 2009 | en_HK |
| dc.identifier.citation | New Journal Of Physics, 2009, v. 11 | en_HK |
| dc.identifier.issn | 1367-2630 | en_HK |
| dc.identifier.uri | http://hdl.handle.net/10722/59666 | - |
| dc.description.abstract | Based on an effective two-band model and using the fluctuation-exchange (FLEX) approach, we explore spin fluctuations and unconventional superconducting pairing in Fe-based layer superconductors. It is elaborated that one type of interband antiferromagnetic (AF) spin fluctuation stems from the interband Coulomb repulsion, whereas the other type of intraband AF spin fluctuation originates from the intraband Coulomb repulsion. Due to the Fermi-surface topology, a spin-singlet extended s-wave superconducting state is more favorable than the nodal dXY-wave state if the interband AF spin fluctuation is more significant than the intraband one, otherwise vice versa. It is also revealed that the effective interband coupling plays an important role in the intraband pairings, which is a distinct feature of the present two-band system. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. | en_HK |
| dc.language | eng | en_HK |
| dc.publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/NJP | en_HK |
| dc.relation.ispartof | New Journal of Physics | en_HK |
| dc.title | Spin fluctuations, interband coupling and unconventional pairing in iron-based superconductors | en_HK |
| dc.type | Article | en_HK |
| dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1367-2630&volume=11&spage=025009: 1&epage=8&date=2009&atitle=Spin+fluctuations,+interband+coupling+and+unconventional+pairing+in+iron-based+superconductors | en_HK |
| dc.identifier.email | Yao, ZJ: zjyao@hku.hk | en_HK |
| dc.identifier.email | Wang, ZD: zwang@hkucc.hku.hk | en_HK |
| dc.identifier.authority | Yao, ZJ=rp00828 | en_HK |
| dc.identifier.authority | Wang, ZD=rp00802 | en_HK |
| dc.description.nature | link_to_subscribed_fulltext | - |
| dc.identifier.doi | 10.1088/1367-2630/11/2/025009 | en_HK |
| dc.identifier.scopus | eid_2-s2.0-63449089120 | en_HK |
| dc.identifier.hkuros | 155370 | en_HK |
| dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-63449089120&selection=ref&src=s&origin=recordpage | en_HK |
| dc.identifier.volume | 11 | en_HK |
| dc.identifier.eissn | 1367-2630 | - |
| dc.identifier.isi | WOS:000263744200008 | - |
| dc.publisher.place | United Kingdom | en_HK |
| dc.identifier.scopusauthorid | Yao, ZJ=24172115800 | en_HK |
| dc.identifier.scopusauthorid | Li, JX=8678926100 | en_HK |
| dc.identifier.scopusauthorid | Wang, ZD=14828459100 | en_HK |
| dc.identifier.citeulike | 4113200 | - |
| dc.identifier.issnl | 1367-2630 | - |