From Fermi Arcs to Nodal Metal: Scaling of the Pseudogap with Temperature and Doping
Abstract
The pseudogap phase in the cuprates is a most unusual state of matter^1-4: it is a metal, but its Fermi surface is broken up into disconnected segments known as Fermi arcs^5. Using angle resolved photoemission spectroscopy, we show that the anisotropy of the pseudogap in momentum space and the resulting arcs depend only on the ratio T/T*(x), where T*(x) is the temperature below which the pseudogap first develops at a given hole doping, x. In particular, the arcs, which extend at T* to the hot spots where the antiferromagnetic zone boundary crosses the Fermi surface, collapse linearly with T/T* and extrapolate to zero extent as T 0. This suggests that the T = 0 state is a nodal liquid, a strange metallic state whose gapless excitations are located only at points in momentum space, just as for a d-wave superconductor.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2006
- Bibcode:
- 2006APS..MARZ38001K