Physics – Condensed Matter – Superconductivity
Scientific paper
2008-10-28
J. Phys. Soc. Jpn. 77, 125002 (2008)
Physics
Condensed Matter
Superconductivity
To appear in J. Phys. Soc. Jpn. (Short Note)
Scientific paper
10.1143/JPSJ.77.125002
In a recent NMR investigation of the iron-based superconductor (La0.87Ca0.13)FePO [Phys. Rev. Lett. 101, 077006 (2008)] Y. Nakai et al. reported an anomalous behavior of the nuclear spin-lattice relaxation of 31P nuclei in the superconducting state: The relaxation rate 1/T1 strongly depends on the measurement frequency and its T dependence does not show the typical decrease expected for the superconducting state. In this short note, we point out that these two observations bear similarity with the situation is some of the high Tc cuprates.
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