Gap structure and mean-field Tc in HTS cuprates
Abstract
We show that phase and amplitude fluctuations set in simultaneously in high-Tc cuprates and determine the mean-field transition temperature Tc^mf which is found to increase substantially above Tc in optimal and underdoped cuprates (by up to 60 or 70K). We find δ/kBTc^mf=2.5, little more than the weak-coupling BCS d-wave value. On the other hand the pseudogap T^* has a distinct doping dependence from Tc^mf and correlates with the pseudogap energy Eg. The gap structure for δ and Eg are characterised and shown to be distinct.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2009
- Bibcode:
- 2009APS..MARL33008T