Nernst effect in the electron-doped cuprate superconductors

被引：23

作者：

Hackl, Andreas ^{[1
,2
]}

Sachdev, Subir ^{[1
]}

机构：

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

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

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 23期

关键词：

T-C SUPERCONDUCTOR; FERMI-SURFACE; ORDER;

D O I：

10.1103/PhysRevB.79.235124

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the normal-state Nernst signal in the cuprates resulting from a reconstruction of the Fermi surface due to spin-density wave order. An order parameter consistent with the reconstruction of the Fermi surface detected in electron-doped materials is shown to sharply enhance the Nernst signal close to optimal doping. Within a semiclassical treatment, the obtained magnitude and position of the enhanced Nernst signal agrees with Nernst measurements in electron-doped cuprates. Our result is mainly caused by the role of Fermi-surface geometry under influence of a spin-density wave gap. We discuss also possible roles of short-ranged magnetic order in the normal-state Nernst effect and the Fermi-surface reconstruction observed by photoemission spectroscopy.

引用

页数：9

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