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

F. Bondino, E. Magnano, M. Malvestuto, F. Parmigiani, M. A. McGuire, A. S. Sefat, B. C. Sales, R. Jin, D. Mandrus, E. W. Plummer, D. J. Singh, and N. Mannella
Phys. Rev. Lett. 101, 267001 – Published 23 December 2008

Abstract

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.

  • Figure
  • Figure
  • Figure
  • Received 27 July 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.267001

©2008 American Physical Society

Authors & Affiliations

F. Bondino1, E. Magnano1, M. Malvestuto2, F. Parmigiani1,3, M. A. McGuire4, A. S. Sefat4, B. C. Sales4, R. Jin4,5, D. Mandrus4, E. W. Plummer5, D. J. Singh4, and N. Mannella5,*

  • 1CNR-INFM, Laboratorio Nazionale TASC, S.S. 14, km 163.5, I-34012 Trieste, Italy
  • 2Sincrotrone Trieste S.C.p.A., Area Science Park, S.S. 14, km 163.5, I-34012 Trieste, Italy
  • 3Dipartimento di Fisica, Università degli Studi di Trieste, I- 34127 Trieste, Italy
  • 4Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 5Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA

  • *To whom correspondence should be addressed. nmannell@utk.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 101, Iss. 26 — 31 December 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×