{"created":"2021-03-01T06:05:48.419898+00:00","id":2114,"links":{},"metadata":{"_buckets":{"deposit":"4cad3bb9-06f8-49e6-b0e5-22ce50fe4299"},"_deposit":{"id":"2114","owners":[],"pid":{"revision_id":0,"type":"depid","value":"2114"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00002114","sets":["176:488:489","453:454"]},"item_5_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2014-03","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicPageEnd":"044711-8","bibliographicPageStart":"044711-1","bibliographicVolumeNumber":"83","bibliographic_titles":[{"bibliographic_title":"Journal of the Physical Society of Japan"},{"bibliographic_title":"Journal of the Physical Society of Japan","bibliographic_titleLang":"en"}]}]},"item_5_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We investigate a two-orbital model for iron-based superconductors to elucidate the effect of interplay between electron correlation and Jahn-Teller electron-phonon coupling by using the dynamical mean-field theory combined with the exact diagonalization method. When the intra- and inter-orbital Coulomb interactions, U and U′, increase with U = U′, both the local spin and orbital susceptibilities,  χ_s and χ_o, increase with χ_s = χ_o in the absence of the Hund’s rule coupling J and the electron-phonon coupling g. In the presence of J and g, there are distinct two regimes: for J >__～ 2g^2 /ω_0 with the phonon frequency ω_0, χ_s is enhanced relative to χ_o and shows a divergence at J = J_c above which the system becomes Mott insulator, while for J <__～ 2g^2/ω_0, χ_o is enhanced relative to χ_s and shows a divergence at g = g_c above which the system becomes bipolaronic insulator. In the former regime, the superconductivity is mediated by antiferromagnetic fluctuations enhanced due to Fermi-surface nesting and is found to be largely dependent on carrier doping. On the other hand, in the latter regime, the superconductivity is mediated by ferro-orbital fluctuations and is observed for wide doping region including heavily doped case without the Fermi-surface nesting.","subitem_description_type":"Abstract"}]},"item_5_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"The Physical Society of Japan"}]},"item_5_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"info:doi/10.7566/JPSJ.83.044711","subitem_relation_type_select":"DOI"}}]},"item_5_relation_31":{"attribute_name":"異版である","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://journals.jps.jp/doi/abs/10.7566/JPSJ.83.044711","subitem_relation_type_select":"URI"}}]},"item_5_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Copyright (C) 2014 The Physical Society of Japan"}]},"item_5_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"author"}]},"item_5_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA00704814","subitem_source_identifier_type":"NCID"}]},"item_5_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00319015","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Yamada, Takemi"}],"nameIdentifiers":[{"nameIdentifier":"7096","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ishizuka, Jun"}],"nameIdentifiers":[{"nameIdentifier":"7097","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ono, Yoshiaki"}],"nameIdentifiers":[{"nameIdentifier":"62","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-07-29"}],"displaytype":"detail","filename":"83_044711.pdf","filesize":[{"value":"801.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"83_044711.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/2114/files/83_044711.pdf"},"version_id":"8435f662-ed04-4fae-bd89-7eeebef5405a"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"iron pnictide superconductor","subitem_subject_scheme":"Other"},{"subitem_subject":"multi-orbital system","subitem_subject_scheme":"Other"},{"subitem_subject":"Jahn-Teller electron-phonon coupling","subitem_subject_scheme":"Other"},{"subitem_subject":"orbital fluctuation","subitem_subject_scheme":"Other"},{"subitem_subject":"magnetic fluctuation","subitem_subject_scheme":"Other"},{"subitem_subject":"dynamical mean-field theory","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Metal-insulator Transition and Superconductivity in the Two-orbital Hubbard-Holstein Model for Iron-based Superconductors","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Metal-insulator Transition and Superconductivity in the Two-orbital Hubbard-Holstein Model for Iron-based Superconductors"},{"subitem_title":"Metal-insulator Transition and Superconductivity in the Two-orbital Hubbard-Holstein Model for Iron-based Superconductors","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["454","489"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-07-18"},"publish_date":"2017-07-18","publish_status":"0","recid":"2114","relation_version_is_last":true,"title":["Metal-insulator Transition and Superconductivity in the Two-orbital Hubbard-Holstein Model for Iron-based Superconductors"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:34:58.791222+00:00"}