Effects of quasiparticle ambipolarity on the Nernst effect in underdoped cuprate superconductors

Details Effects of quasiparticle ambipolarity on the Nernst effect in underdoped cuprate superconductors Effects of quasiparticle ambipolarity on the Nernst effect in underdoped cuprate superconductors

2009-01-30

arxiv.org/abs/0902.0012v3

Phys. Rev. Lett. 103, 077001 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 eps figures; parts rewritten, new references added; version as published in PRL

Scientific paper

10.1103/PhysRevLett.103.077001

We consider the Nernst effect in the normal state of the underdoped cuprate superconductors, where recent quantum oscillation experiments have indicated the existence of Fermi surface pockets and quasiparticle ambipolarity in the excitation spectrum. Using an ambipolar d-density wave model for the pseudogap, we predict a peak in the Nernst coefficient with decreasing temperature below the pseudogap temperature. The existence of the peak and its sign, which we predict to be the same as that due to mobile vortices in a superconductor, result from the dominance of the electron pocket at low temperatures, as has been observed in recent Hall experiments.

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