Consistency between Itinerant and Local-Moment Pictures for Superconductivity in Alkaline Iron Selenide Superconductors

We study the superconducting pairing in an effective one-orbital model for alkaline iron-selenide superconductors. In both itinerant and local-moment pictures, we find that the nearest-neighbor hopping t1 plays a crucial role. The pairing symmetry changes from s-wave to d-wave as t1 is enhanced. For...

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Bibliographic Details
Published inChinese physics letters Vol. 31; no. 6; pp. 199 - 202
Main Author 李海超 向圆圆 王强华
Format Journal Article
LanguageEnglish
Published 01.06.2014
Subjects
Consistency
Iron
Iron and steel industry
Pictures
Selenides
Superconductivity
Superconductors
Symmetry
不一致性
图片
对称性
硒
碱性
超导体
轨道模型
铁
Online AccessGet full text
ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/31/6/067404

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Summary:We study the superconducting pairing in an effective one-orbital model for alkaline iron-selenide superconductors. In both itinerant and local-moment pictures, we find that the nearest-neighbor hopping t1 plays a crucial role. The pairing symmetry changes from s-wave to d-wave as t1 is enhanced. For a reasonable t1 relevant to the experiment, the pairing symmetry is s-wave in both pictures, in agreement with the angle-resolved photo-emission. The results resolve the previous theoretical inconsistency in the two pictures.
Bibliography:LI Hai-Chao, XIANG Yuan-Yuan, WANG Qiang-Hua（ National Laboratory of Solid State Microstrueture and Department of Physics, Nanjing University, Nanjing 210093）
11-1959/O4
We study the superconducting pairing in an effective one-orbital model for alkaline iron-selenide superconductors. In both itinerant and local-moment pictures, we find that the nearest-neighbor hopping t1 plays a crucial role. The pairing symmetry changes from s-wave to d-wave as t1 is enhanced. For a reasonable t1 relevant to the experiment, the pairing symmetry is s-wave in both pictures, in agreement with the angle-resolved photo-emission. The results resolve the previous theoretical inconsistency in the two pictures.
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/6/067404