Unified Picture for the Colossal Thermopower Compound FeSb2

被引：38

作者：

Battiato, M. ^{[1
]}

Tomczak, J. M. ^{[1
]}

Zhong, Z. ^{[1
]}

Held, K. ^{[1
]}

机构：

[1] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 23期

基金：

欧洲研究理事会;

关键词：

NARROW-GAP SEMICONDUCTOR; TRANSITION;

D O I：

10.1103/PhysRevLett.114.236603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We identify the driving mechanism of the gigantic Seebeck coefficient in FeSb2 as the phonon-drag effect associated with an in-gap density of states that we demonstrate to derive from excess iron. We accurately model electronic and thermoelectric transport coefficients and explain the so far ill-understood correlation of maxima and inflection points in different response functions. Our scenario has far-reaching consequences for attempts to harvest the spectacular power factor of FeSb2.

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页数：5

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