Nuclear Magnetic Relaxation Rate in Iron-Pnictide Superconductors

Abstract

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.

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

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