Experimental evidence for a small s-wave component in the order parameter of underdoped
Physics Department, Technion-Israel Institute of Technology -
Haifa, 32000, Israel
Corresponding author: firstname.lastname@example.org
Accepted: 15 April 2002
We report conductance measurements in underdoped tunneling junctions of the ramp type, oriented along different directions in the ab plane. We find that the -wave gap is suppressed in the region near the node, but has a non-zero value of at the node. This result supports the existence of a sub-dominant is component in the order parameter of underdoped .
PACS: 74.20.Rp – Pairing symmetries (other than s-wave) / 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects / 74.72.Bk – Y-based cuprates
© EDP Sciences, 2002