Evidence for Strong Itinerant Spin Fluctuations in the Normal State of CeFeAsO0.89F0.11 Iron-Oxypnictide Superconductors

被引：100

作者：

Bondino, F. ^{[2
]}

Magnano, E. ^{[2
]}

Malvestuto, M. ^{[3
]}

Parmigiani, F. ^{[2
,4
]}

McGuire, M. A. ^{[5
]}

Sefat, A. S. ^{[5
]}

Sales, B. C. ^{[5
]}

Jin, R. ^{[1
,5
]}

Mandrus, D. ^{[5
]}

Plummer, E. W. ^{[1
]}

Singh, D. J. ^{[5
]}

Mannella, N. ^{[1
]}

机构：

[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[2] CNR INFM, Lab Nazl TASC, I-34012 Trieste, Italy

[3] Sincrotrone Trieste SCpA, I-34012 Trieste, Italy

[4] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy

[5] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.101.267001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic structure in the normal state of CeFeAsO0.89F0.11 oxypnictide superconductors has been investigated with x-ray absorption and photoemission spectroscopy. All of the data exhibit signatures of Fe d-electron itinerancy. Exchange multiplets appearing in the Fe 3s core level indicate the presence of itinerant spin fluctuations. These findings suggest that the underlying physics and the origin of superconductivity in these materials are likely to be quite different from those of the cuprate high-temperature superconductors. These materials provide opportunities for elucidating the role of magnetic fluctuations in high-temperature superconductivity.

引用

页数：4

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