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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.

作者信息

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

机构信息

Department of Physics, Columbia University, New York, New York 10027, USA.

出版信息

Phys Rev Lett. 2009 Feb 27;102(8):087001. doi: 10.1103/PhysRevLett.102.087001. Epub 2009 Feb 23.

DOI:10.1103/PhysRevLett.102.087001
PMID:19257776
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 T_{c} in the Ce-, La-, and Nd-FeAs superconductors following a nearly linear relationship found in cuprates.

摘要

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