Abstract
We discuss the effect of a secondary component of the superconducting order parameter on the superfluid density in the cuprates. If we assume a main gap, the most stable realization of a mixed order parameter has a time-reversal breaking symmetry. In this state the nodes are removed and the temperature dependence of the superfluid density changes from the linear behavior of a pure wave to a more rounded shape at low temperature. The latter is compatible with the behavior experimentally observed in the in-plane magnetic field penetration depth of optimally doped and .
- Received 18 June 2010
DOI:https://doi.org/10.1103/PhysRevB.82.132504
©2010 American Physical Society