Impurity Site NMR Relaxation in Unconventional Superconductors

Details Impurity Site NMR Relaxation in Unconventional Superconductors Impurity Site NMR Relaxation in Unconventional Superconductors

2000-11-15

arxiv.org/abs/cond-mat/0011257v2

J. Phys. Soc. Jpn. 70 (2001) 2505

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, JPSJ.sty

Scientific paper

10.1143/JPSJ.70.2505

Impurity nuclear spin relaxation is studied theoretically. A single impurity generates a bound state localized around the impurity atom in unconventional superconductors. With increasing impurity potential, the relaxation rate $T_1^{-1}$ is reduced by the impurity potential. However, it has a peak at low temperatures due to the impurity bound state. The peak disappears at non-impurity sites. The impurity site NMR measurement detecting a local electronic structure just on the impurity atom is very useful for identifying the unconventional pairing states.

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