Thermoelectric power of MgB2-xBex -: art. no. 214534

被引：15

作者：

Ahn, JS ^{[1
]}

Choi, ES

Kang, W

Singh, DJ

Han, M

Choi, EJ

机构：

[1] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151742, South Korea

[2] Ewha Womans Univ, Dept Phys, Seoul 120750, South Korea

[3] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC USA

[4] Seoul Natl Univ, Dept Phys, Seoul 130743, South Korea

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.65.214534

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated thermoelectric power S(T) of MgB2-xBex (x=0, 0.2, 0.3, 0.4, and 0.6). S(T) decreases systematically with x, suggesting that the hole density increases. Our band calculation shows that the increase occurs in the sigma band. With the hole doping, T-c decreases. Implication of this phenomenon is discussed within the BCS framework. While the Mott formula explains only the linear part of S(T) at low temperature, incorporation of electron-phonon interaction enables us to explain S(T) over wide temperature range including the anomalous behavior at high temperature.

引用

页码：2145341 / 2145345

页数：5

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