Robust p-type behavior in polycrystalline, ball-milled, magnesium-doped Bi2Se3

被引：8

作者：

Androulakis, J. ^{[1
]}

Beciragic, E. ^{[1
]}

机构：

[1] Gentherm Inc, Azusa, CA 91702 USA

来源：

SOLID STATE COMMUNICATIONS | 2013年 / 173卷

关键词：

Thermoelectric material; Semiconductors; Ball-milling; Effective mass; CONDUCTION-BAND; SURFACE;

D O I：

10.1016/j.ssc.2013.08.023

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study polycrystalline pellets of magnesium doped Bi2Se3 compacted from powders processed with planetary milling, a high energy crude metallurgical method. We present evidence that the specimens are p-type and that hole conduction is robust over a wide temperature range. The p-type behavior was probed at room temperature and above with Hall and Seebeck coefficient measurements. The first order non-parabolicity approximation was used to show that holes contribute a higher thermoelectric power compared to that of electrons in agreement with recent theoretical band structure calculations. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：5 / 8

页数：4

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