Anisotropic Seebeck and magneto-Seebeck coefficients of Bi and Bi0.92Sb0.08 alloy thin films

被引：5

作者：

Cho, SL ^{[1
]}

Kim, Y

DiVenere, A

Wong, GKL

Ketterson, JB

Meyer, JR

机构：

[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[2] USN, Res Lab, Washington, DC 20375 USA

[3] Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA

[4] HKUST, Dept Phys, Kowloon, Hong Kong, Peoples R China

[5] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 88卷 / 02期

关键词：

D O I：

10.1063/1.373740

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have grown Bi and BiSb alloy thin films on (211)CdTe substrates by molecular beam epitaxy. Growth proceeds with the Bi or BiSb (00.1) axis oriented along the CdTe[111] direction, which is tilted by 19 degrees with respect to the substrate normal. Measurements of the Seebeck coefficient reveal a strong dependence on angle within the plane, due to the anisotropic electronic structure. The coefficient measured along the [(1) over bar 11] axis, which includes a trigonal contribution from the Seebeck tensor, is considerably higher than the value along the [01(1) over bar] axis. The magneto-Seebeck coefficient was also studied, for magnetic fields of 0-0.7 T. We observe a strong dependence on both crystal-axis and magnetic field direction, the so-called "umkehr" effect. (C) 2000 American Institute of Physics. [S0021-8979(00)06714-1].

引用

页码：808 / 812

页数：5

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