Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-08-07
Phys. Rev. B 81, 045102 (2010)
Physics
Condensed Matter
Strongly Correlated Electrons
16 pages, 14 figures, discussion of signal anisotropy included now; some clarifications added to formulas and experimental imp
Scientific paper
10.1103/PhysRevB.81.045102
Experiments on underdoped cuprate superconductors suggest an intricate relation between the normal-state Nernst effect and stripe order: The Nernst signal appears enhanced near 1/8 hole doping and its onset temperature scales with the stripe-ordering temperature over some range of doping. Here, we employ a phenomenological quasiparticle model to calculate the normal state Nernst signal in the presence of stripe order. We find that Fermi pockets caused by translational symmetry breaking lead to a strongly enhanced Nernst signal with a sign depending on the modulation period of the ordered state and other details of the Fermi surface. This implies differences between antiferromagnetic and charge-only stripes We compare our findings with recent data from Nd-LSCO and YBCO.
Hackl Andreas
Sachdev Subir
Vojta Matthias
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