Nernst effect of stripe ordering La1.8-xEu0.2SrxCuO4

被引：18

作者：

Hess, C. ^{[1
]}

Ahmed, E. M. ^{[1
]}

Ammerahl, U. ^{[2
]}

Revcolevschi, A. ^{[2
]}

Buechner, B. ^{[1
]}

机构：

[1] IFW Dresden, Inst Solid State Res, D-01171 Dresden, Germany

[2] Univ Paris 11, Lab Physicochim Etat Solide, ICMMO, UMR 8182, F-91405 Orsay, France

来源：

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2010年 / 188卷 / 01期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTOR; COPPER-OXIDE SUPERCONDUCTORS; STRUCTURAL PHASE-TRANSITION; EARTH-DOPED LA2-XSRXCUO4; SOFT-PHONON BEHAVIOR; T-C SUPERCONDUCTOR; TRANSPORT-PROPERTIES; NEUTRON-SCATTERING; FLUX-FLOW; EXCITATIONS;

D O I：

10.1140/epjst/e2010-01300-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the transport properties of La1.8-xEu0.2SrxCuO4 (x = 0.04, 0.08, 0.125, 0.15, 0.2) with a special focus on the Nernst effect in the normal state. Various anomalous features are present in the data. For x = 0.125 and 0.15 a kink-like anomaly is present in the vicinity of the onset of charge stripe order in the LTT phase, suggestive of enhanced positive quasiparticle Nernst response in the stripe ordered phase. At higher temperature, all doping levels except x = 0.2 exhibit a further kink anomaly in the LTO phase which cannot unambiguously be related to stripe order. Moreover, a direct comparison between the Nernst coefficients of stripe ordering La1.8-xEu0.2SrxCuO4 and superconducting La2-xSrxCuO4 at the doping levels x = 0.125 and x = 0.15 reveals only weak differences. Our findings make high demands on any scenario interpreting the Nernst response in hole-doped cuprates.

引用

页码：103 / 112

页数：10

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