High-Field Pauli-Limiting Behavior and Strongly Enhanced Upper Critical Magnetic Fields near the Transition Temperature of an Arsenic-Deficient LaO0.9F0.1FeAs1-δ Superconductor

被引：84

作者：

Fuchs, G. ^{[1
]}

Drechsler, S. -L. ^{[1
]}

Kozlova, N. ^{[1
]}

Behr, G. ^{[1
]}

Koehler, A. ^{[1
]}

Werner, J. ^{[1
]}

Nenkov, K. ^{[1
]}

Klingeler, R. ^{[1
]}

Hamann-Borrero, J. ^{[1
]}

Hess, C. ^{[1
]}

Kondrat, A. ^{[1
]}

Grobosch, M. ^{[1
]}

Narduzzo, A. ^{[1
]}

Knupfer, M. ^{[1
]}

Freudenberger, J. ^{[1
]}

Buechner, B. ^{[1
]}

Schultz, L. ^{[1
]}

机构：

[1] IFW Dresden, D-01171 Dresden, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.101.237003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report upper critical field B-c2(T) data for disordered (arsenic-deficient) LaO0.9F0.1FeAs1-delta in a wide temperature and magnetic field range up to 47 T. Because of the large linear slope of B-c2 approximate to-5.4 to -6.6 T/K near T-c approximate to 28.5 K, the T dependence of the in-plane B-c2(T) shows a flattening near 23 K above 30 T which points to Pauli-limited behavior with B-c2(0)approximate to 63-68 T. Our results are discussed in terms of disorder effects within conventional and unconventional superconducting pairings.

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页数：4

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