Coexistence of magnetic fluctuations and superconductivity in the pnictide high temperature superconductor SmFeAsO1-xFx measured by muon spin rotation

被引：110

作者：

Drew, A. J. ^{[1
]}

Pratt, F. L. ^{[2
]}

Lancaster, T. ^{[3
]}

Blundell, S. J. ^{[3
]}

Baker, P. J. ^{[3
]}

Liu, R. H. ^{[4
,5
]}

Wu, G. ^{[4
,5
]}

Chen, X. H. ^{[4
,5
]}

Watanabe, I. ^{[6
]}

Malik, V. K. ^{[1
]}

Dubroka, A. ^{[1
]}

Kim, K. W. ^{[1
]}

Roessle, M. ^{[1
]}

Bernhard, C. ^{[1
]}

机构：

[1] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[2] Rutherford Appleton Lab, ISIS Facil, Chilton OX11 0QX, Oxon, England

[3] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[4] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[5] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China

[6] RIKEN RAL, Nishina Ctr, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 09期

基金：

瑞士国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.097010

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Muon spin rotation experiments were performed on the pnictide high temperature superconductor SmFeAsO(1-x)F(x) with x = 0. 18 and 0.3. We observed an unusual enhancement of slow spin fluctuations in the vicinity of the superconducting transition which suggests that the spin fluctuations contribute to the formation of an unconventional superconducting state. An estimate of the in-plane penetration depth lambda(ab)(0) = 190(5) nm was obtained, which confirms that the pnictide superconductors obey an Uemura-style relationship between T(c) and lambda(ab)(0)(-2).

引用

页数：4

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