Nuclear Magnetic Relaxation Rate in Iron-Pnictide Superconductors

Details Nuclear Magnetic Relaxation Rate in Iron-Pnictide Superconductors Nuclear Magnetic Relaxation Rate in Iron-Pnictide Superconductors

2009-11-16

arxiv.org/abs/0911.2963v1

Physics

Condensed Matter

Superconductivity

Proceedings of 9th International Conference on Materials and Mechanisms of Superconductivity. To be published in Physica C

Scientific paper

10.1016/j.physc.2009.10.123

Nuclear magnetic relaxation rate 1/T_1 in iron-pnictide superconductors is calculated using the gap function obtained in a microscopic calculation. Based on the obtained results, we discuss the issues such as the rapid decrease of 1/T_1 just below the transition temperature and the difference between nodeless and nodal s-wave gap functions. We also investigate the effect of Coulomb interaction on 1/T_1 in the random phase approximation and show its importance in interpreting the experimental results.

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