Unconventional pairing in the iron arsenide superconductors

被引：175

作者：

Fernandes, Rafael M. ^{[1
]}

Pratt, Daniel K.

Tian, Wei

Zarestky, Jerel

Kreyssig, Andreas

Nandi, Shibabrata

Kim, Min Gyu

Thaler, Alex

Ni, Ni

Canfield, Paul C.

McQueeney, Robert J.

Schmalian, Joerg

Goldman, Alan I.

机构：

[1] US DOE, Ames Lab, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 14期

关键词：

CUPRATE SUPERCONDUCTORS; SYMMETRY; PNICTIDES; STATE;

D O I：

10.1103/PhysRevB.81.140501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use magnetic long-range order as a tool to probe the Cooper-pair wave function in the iron arsenide superconductors. We show theoretically that antiferromagnetism and superconductivity can coexist in these materials only if Cooper pairs form an unconventional, sign-changing state. The observation of coexistence in Ba(Fe1-xCox)2As2 then demonstrates unconventional pairing in this material. The detailed agreement between theory and neutron-diffraction experiments, in particular, for the unusual behavior of the magnetic order below T-c, demonstrates the robustness of our conclusions. Our findings strongly suggest that superconductivity is unconventional in all members of the iron arsenide family.

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页数：4

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