Static magnetic order and superfluid density of RFeAs(O,F) (R=La,Nd,Ce) and LaFePO studied by muon spin relaxation: Unusual similarities with the behavior of cuprate superconductors

J. P. Carlo, Y. J. Uemura, T. Goko, G. J. MacDougall, J. A. Rodriguez, W. Yu, G. M. Luke, Pengcheng Dai, N. Shannon, S. Miyasaka, S. Suzuki, S. Tajima, G. F. Chen, W. Z. Hu, J. L. Luo, N. L. Wang

Research output: Contribution to journalArticlepeer-review

Abstract

Muon spin relaxation measurements in iron-oxypnictide systems have revealed: (1)commensurate long-range order in undoped LaFeAsO; (2) a Bessel function line shape in LaFeAs(O0.97F0.03) which indicates possible incommensurate or stripe magnetism; (3) anomalous weak magnetism existing in superconducting LaFePO, CeFeAs(O0.084F0.16), and NdFeAs(O0.88F0.12) but absent in superconducting LaFeAs(O0.92F0.08); and (4) scaling of the superfluid density with Tc in the Ce-, La-, and Nd-FeAs superconductors following a nearly linear relationship found in cuprates.

Original languageEnglish (US)
Article number087001
JournalPhysical review letters
Volume102
Issue number8
DOIs
StatePublished - Feb 23 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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