Superconducting Gap Nodal Surface and Fermi Surface: their partial overlap in cuprates

G. Baskaran, D. G. Kanhere, Mihir Arjunwadkar +1

Electron correlation in cuprates leads to a global constraint ${\sum }_{\mathbf{k}}{\Delta }_{\mathbf{k}}=0$ on the gap function ${\Delta }_{\mathbf{k}}$ resulting in a gap nodal surface. We give physical argume…