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 d(x2-y2) gap, the most stable realization of a mixed order parameter has a time-reversal breaking d(x2-y2)+id(xy) symmetry. In this state the nodes are removed and the temperature dependence of the superfluid density changes from the linear behavior of a pure d 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 La(2-x)Sr(x)CuO(2) and YBa(2)Cu(3)O(7-y). RI Capone, Massimo/A-7762-2008
Possible secondary component of the order parameter observed in London penetration depth measurements
Capone, Massimo;
2010-01-01
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 d(x2-y2) gap, the most stable realization of a mixed order parameter has a time-reversal breaking d(x2-y2)+id(xy) symmetry. In this state the nodes are removed and the temperature dependence of the superfluid density changes from the linear behavior of a pure d 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 La(2-x)Sr(x)CuO(2) and YBa(2)Cu(3)O(7-y). RI Capone, Massimo/A-7762-2008I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
