Superconducting phenomenology of cuprates: effect of pseudo-gap and other anomalies

This paper discusses new aspects of the superconducting phenomenology of th e cuprate high-T-c superconductors in terms of the change in superconductin g condensation energy and the electronic states in the vortex core due to t he extreme phenomenological parameters, the d-wave superconducting gap and the presence of the 'pseudo-gap' in the normal state. It is shown that the extreme phenomenological parameters and the d-wave superconducting gap make the vortex state of high-T-c superconductors quite different from that of conventional superconductors in many aspects both thermodynamically and dyn amically. Further, we show that the presence of the 'pseudo-gap' should red uce the condensation energy and increase the penetration depth. The effect of the 'pseudo-gap' on the vortex pinning is discussed in relation to the e mpirical scaling laws observed in the phase diagram in the mixed state. (C) 1999 Elsevier Science B.V. All rights reserved.