Non-Locality and Strong Coupling in the Heavy Fermion Superconductor CeCoIn${}_5$: A Penetration Depth Study

Elbert E. M. Chia, D. J. Van Harlingen, M. B. Salamon +3

We report measurements of the magnetic penetration depth $\lambda$ in single crystals of CeCoIn${}_5$ down to $\sim$0.14 K using a tunnel-diode based, self-inductive technique at 28 MHz.…