Influence of Dirac Fermions on Magnetothermoelectric Transport in Iron-Based Superconductors

被引：0

作者：

Matusiak, M. ^{[1
]}

Bukowski, Z. ^{[1
]}

Karpinski, J. ^{[2
]}

Pomjakushina, E. ^{[3
]}

Conder, K. ^{[3
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

[2] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[3] Paul Scherrer Inst, Lab Dev & Methods, CH-5232 Villigen, Switzerland

来源：

NEW MATERIALS FOR THERMOELECTRIC APPLICATIONS: THEORY AND EXPERIMENT | 2013年

关键词：

PHASE;

D O I：

10.1007/978-94-007-4984-9_13

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report the Nernst coefficient (nu) measurements in parent compounds of the iron pnictides CaFe2As2 and EuFe2As2 ("122",) as well as the iron chalcogenide Fe1.04Te ("11"). In all three single crystals we observe an anomaly in nu(T) that develops in the magnetically ordered state. However, there are clear differences between anomalies in the "122" iron pnictides and the "11" chalcogenide which can be ascribed to presence of Dirac cones in the antiferromagneticmetallic state of "122" compounds. We also investigate influence of substitution of Fe with Co on the Nernst effect in the series of Eu(Fe1-xCox)(2)As-2 single crystals. We notice that even small cobalt doping (x = 0.15) causes eradication of Dirac fermions contribution to transport effects.

引用

页码：199 / 205

页数：7

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