Mn local moments prevent superconductivity in iron pnictides Ba(Fe1-xMnx)2As2

被引：46

作者：

Texier, Y. ^{[1
]}

Laplace, Y. ^{[1
]}

Mendels, P. ^{[1
,2
]}

Park, J. T. ^{[3
]}

Friemel, G. ^{[3
]}

Sun, D. L. ^{[3
]}

Inosov, D. S. ^{[3
]}

Lin, C. T. ^{[3
]}

Bobroff, J. ^{[1
]}

机构：

[1] Univ Paris 11, CNRS, UMR8502, Phys Solides Lab, F-91405 Orsay, France

[2] Inst Univ France, F-75005 Paris, France

[3] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

来源：

EPL | 2012年 / 99卷 / 01期

关键词：

D O I：

10.1209/0295-5075/99/17002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

As-75 nuclear magnetic resonance (NMR) experiments were performed on Ba(Fe1-xMnx)(2)As-2 (x(Mn) = 2.5%, 5% and 12%) single crystals. The Fe layer magnetic susceptibility far from Mn atoms is probed by the As-75 NMR line shift and is found similar to that of BaFe2As2, implying that Mn does not induce charge doping. A satellite line associated with the Mn nearest neighbours (n.n.) of As-75 displays a Curie-Weiss shift which demonstrates that Mn carries a local magnetic moment. This is confirmed by the main line broadening typical of a RKKY-like Mn-induced staggered spin polarization. The Mn moment is due to the localization of the additional Mn hole. These findings explain why Mn does not induce superconductivity in the pnictides contrary to other dopants such as Co, Ni, Ru or K. Copyright (C) EPLA, 2012

引用

页数：6

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