A Sharp Peak of the Zero-Temperature Penetration Depth at Optimal Composition in BaFe2(As1-xPx)2

K. Hashimoto, K. Cho, T. Shibauchi +14

In a superconductor, the ratio of the carrier density, $n$, to their effective mass, $m^{\ast }$, is a fundamental property directly reflecting the length scale of the superfluid flow, t…