Nernst effect anisotropy as a sensitive probe of Fermi surface distortions from electron-nematic order

Details Nernst effect anisotropy as a sensitive probe of Fermi surface distortions from electron-nematic order Nernst effect anisotropy as a sensitive probe of Fermi surface distortions from electron-nematic order

2009-09-25

arxiv.org/abs/0909.4534v2

Phys. Rev. B 80, 220514(R) (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figs; (v2) slight changes and clarifications

Scientific paper

10.1103/PhysRevB.80.220514

We analyze the thermoelectric response in layered metals with spontaneously broken rotation symmetry. We identify the anisotropy of the quasiparticle Nernst signal as an extremely sensitive probe of Fermi surface distortions characteristic of the ordered state. This is due to a subtle interplay of different transport anisotropies which become additionally enhanced near van-Hove singularities. Applied to recent experiments, our results reinforce the proposal that the underdoped cuprate superconductor YBCO displays such ``electron-nematic'' order in the pseudogap regime.

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