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Article: Theory for superconductivity in (Tl,K)Fe xSe 2 as a doped Mott insulator

TitleTheory for superconductivity in (Tl,K)Fe xSe 2 as a doped Mott insulator
Authors
KeywordsSuperconductivity
Condensed matter: electrical, magnetic and optical
Issue Date2011
PublisherInstitute of Physics Publishing Ltd.. The Journal's web site is located at http://iopscience.iop.org/0295-5075
Citation
Epl, 2011, v. 95 n. 1 How to Cite?
AbstractPossible superconductivity in the recently discovered (Tl,K)Fe xSe 2 compounds is studied from the viewpoint of doped Mott insulator. The Mott insulating phase is examined to be preferred in the parent compound at x=1.5 due to the presence of Fe-vacancies. Partial filling of vacancies at the Fe-sites introduces electron carriers and leads to electron-doped superconductivity. By using a two-orbital Hubbard model in the strong-coupling limit, we find that the s-wave pairing is more favorable at small Hund's coupling, and dx 2-y 2-wave pairing is more favorable at large Hund's coupling. Copyright © 2011 EPLA.
Persistent Identifierhttp://hdl.handle.net/10722/139612
ISSN
2015 Impact Factor: 1.963
2015 SCImago Journal Rankings: 0.565
ISI Accession Number ID
Funding AgencyGrant Number
National Basic Research Program of China2011CBA00103
NSFC11074218
PCSIRTIRT0754
RGC
Funding Information:

We acknowledge valuable discussions with M. H. Fang, P. A. Lee and T. K. NG. YZ and D-HX are supported by National Basic Research Program of China (Grant No. 2011CBA00103), NSFC (Grant No. 11074218) and PCSIRT (Grant No. IRT0754). W-QC and F-CZ are supported by RGC grant of HKSAR in part.

References

 

DC FieldValueLanguage
dc.contributor.authorZhou, Yen_HK
dc.contributor.authorXu, DHen_HK
dc.contributor.authorZhang, FCen_HK
dc.contributor.authorChen, WQen_HK
dc.date.accessioned2011-09-23T05:52:39Z-
dc.date.available2011-09-23T05:52:39Z-
dc.date.issued2011en_HK
dc.identifier.citationEpl, 2011, v. 95 n. 1en_HK
dc.identifier.issn0295-5075en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139612-
dc.description.abstractPossible superconductivity in the recently discovered (Tl,K)Fe xSe 2 compounds is studied from the viewpoint of doped Mott insulator. The Mott insulating phase is examined to be preferred in the parent compound at x=1.5 due to the presence of Fe-vacancies. Partial filling of vacancies at the Fe-sites introduces electron carriers and leads to electron-doped superconductivity. By using a two-orbital Hubbard model in the strong-coupling limit, we find that the s-wave pairing is more favorable at small Hund's coupling, and dx 2-y 2-wave pairing is more favorable at large Hund's coupling. Copyright © 2011 EPLA.en_HK
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd.. The Journal's web site is located at http://iopscience.iop.org/0295-5075 en_HK
dc.relation.ispartofEPLen_HK
dc.rightsEurophysics Letters. Copyright © Institute of Physics Publishing Ltd..-
dc.subjectSuperconductivity-
dc.subjectCondensed matter: electrical, magnetic and optical-
dc.titleTheory for superconductivity in (Tl,K)Fe xSe 2 as a doped Mott insulatoren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0295-5075&volume=95&issue=1, 17003&spage=&epage=&date=2011&atitle=Theory+for+superconductivity+in+(Tl,K)FexSe2+as+a+doped+Mott+insulator-
dc.identifier.emailZhang, FC: fuchun@hkucc.hku.hken_HK
dc.identifier.emailChen, WQ: wqchen@hku.hken_HK
dc.identifier.authorityZhang, FC=rp00840en_HK
dc.identifier.authorityChen, WQ=rp00673en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1209/0295-5075/95/17003en_HK
dc.identifier.scopuseid_2-s2.0-79960152586en_HK
dc.identifier.hkuros193505en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79960152586&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume95en_HK
dc.identifier.issue1en_HK
dc.identifier.isiWOS:000291990600021-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridZhou, Y=36460466600en_HK
dc.identifier.scopusauthoridXu, DH=7404073500en_HK
dc.identifier.scopusauthoridZhang, FC=14012468800en_HK
dc.identifier.scopusauthoridChen, WQ=36077405600en_HK

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