Pseudogap ground state in high-temperature superconductors
Abstract
By re-examining recently published photoemission data we demonstrate that the apparent Fermi surface of the pseudogap ground state is a disconnected arc centered on the nodes. This scenario is also consistent with results from Raman spectroscopy and NMR. We also show that it is consistent with doping-dependent entropy data and discuss the origins of this unusual electronic “arc-liquid” state. We show that the pseudogap closes, and the arcs become connected, when the antiferromagnetic (AF) correlation length falls to the size of the lattice parameter. These results are consistent with a picture of Fermi-surface reconstruction due to short-range AF correlations.
- Publication:
-
Physical Review B
- Pub Date:
- October 2008
- DOI:
- 10.1103/PhysRevB.78.140506
- arXiv:
- arXiv:0803.1884
- Bibcode:
- 2008PhRvB..78n0506S
- Keywords:
-
- 74.25.Jb;
- 74.25.Bt;
- 74.25.Dw;
- 74.72.-h;
- Electronic structure;
- Thermodynamic properties;
- Superconductivity phase diagrams;
- Cuprate superconductors;
- Condensed Matter - Superconductivity
- E-Print:
- 4 pages, 3 figures, added discussion of NMR and optical conductivity data, submitted to Physical Review B as a rapid communication