19-F NMR Investigation of Iron-pnictide Superconductor LaFeAsO(0.89)F(0.11)

Abstract

We report 19-F NMR investigation of the new high temperature superconductor LaFeAsO(0.89)F(0.11) (Tc ~ 28K). We demonstrate that low frequency spin fluctuations exhibit pseudo gap behavior above Tc. We also deduce the London penetration depth lambda from NMR line broadening below Tc.

Accepted for publication in Phys. Rev. B (Rapid) with the original submission date

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