London Penetration Depth of Heavy-Fermion Superconductors

Abstract

The dynamic effective mass in heavy-fermion systems is different from the bare mass, unlike in one-component Fermi liquids. This is used to explain the appearance of a heavy mass in the London penetration depth at all temperatures. ${F}_{0}^{s}\ensuremath{\sim}{10}^{2}$ and ${F}_{1}^{s}\ensuremath{\sim}1$ are found, reflecting the strong frequency dependence but weak momentum dependence of the conduction-electron self-energy.