Quasiparticle Nernst effect in stripe-ordered cuprates

被引：47

作者：

Hackl, Andreas ^{[1
]}

Vojta, Matthias ^{[1
]}

Sachdev, Subir ^{[2
]}

机构：

[1] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 04期

基金：

美国国家科学基金会;

关键词：

FERMI-SURFACE; PHASE-DIAGRAM; PSEUDOGAP; SUPERCONDUCTIVITY; STATE; SPINS;

D O I：

10.1103/PhysRevB.81.045102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 also analyze the anisotropy of the Nernst signal and compare our findings with recent data from La1.6-xNd0.4SrxCuO4 and YBa2Cu3Oy.

引用

页数：15

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