Nernst effect of the intermediate valence compound YbAl3: revisiting the thermoelectric properties

被引：5

作者：

Wei, Beipei ^{[1
,2
]}

Zhang, Jiahao ^{[2
]}

Sun, Peijie ^{[2
]}

Wang, Wenquan ^{[1
]}

Wang, Nanlin ^{[2
,3
,4
]}

Steglich, Frank ^{[5
]}

机构：

[1] Jilin Univ, Coll Phys, Changchun 130023, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China

[4] Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China

[5] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2015年 / 27卷 / 10期

基金：

美国国家科学基金会;

关键词：

thermopower; heavy fermion; Nernst effect; YB;

D O I：

10.1088/0953-8984/27/10/105601

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The Nernst effect and thermopower of the prototypical Yb-based intermediate valence compound YbAl3 were investigated. Different to the thermopower whose absolute values are enhanced with increasing temperature and assume a broad maximum at 175 K, the Nernst coefficient of YbAl3 is enhanced only below T approximate to 75 K. While the two quantities in the heavy-fermion compound CeCu2Si2 were recently found to be related by the anomalous Hall mobility due to the local asymmetric Kondo scattering, this theorem fails when being applied to YbAl3. Rather, the thermopower of YbAl3 is well described by a simple narrow-band model. We discuss the reason for this in terms of the intermediate valence nature of YbAl3 that is conceptually different from the local Kondo physics.

引用

页数：4

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