Signature of pseudogap formation in the density of states of underdoped cuprates

Details Signature of pseudogap formation in the density of states of underdoped cuprates Signature of pseudogap formation in the density of states of underdoped cuprates

2010-06-16

arxiv.org/abs/1006.3232v1

Phys. Rev. B vol. 82, 024521 (2010)

Physics

Condensed Matter

Superconductivity

12 pages, 12 figures, submitted to PRB

Scientific paper

10.1103/PhysRevB.82.024521

The resonating valence bond spin liquid model for the underdoped cuprates has as an essential element, the emergence of a pseudogap. This new energy scale introduces asymmetry in the quasiparticle density of states because it is associated with the antiferromagnetic Brillouin zone. By contrast, superconductivity develops on the Fermi surface and this largely restores the particle-hole symmetry for energies below the superconducting energy gap scale. In the highly underdoped regime, these two scales can be separately identified in the density of states and also partial density of states for each fixed angle in the Brillouin zone. From the total density of states, we find that the pseudogap energy scale manifests itself differently as a function of doping for positive and negative bias. Furthermore, we find evidence from recent scanning tunneling spectroscopy data for asymmetry in the positive and negative bias of the extracted $\Delta(\theta)$ which is in qualitative agreement with this model. Likewise, the slope of the linear low energy density of states is nearly constant in the underdoped regime while it increases significantly with overdoping in agreement with the data.

Affiliated with

Also associated with

No associations

Rating

Signature of pseudogap formation in the density of states of underdoped cuprates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Signature of pseudogap formation in the density of states of underdoped cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signature of pseudogap formation in the density of states of underdoped cuprates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-100757