Phonon contribution to the transport properties of single-crystal MgB2 -: art. no. 214513

被引：47

作者：

Masui, T

Yoshida, K

Lee, S

Yamamoto, A

Tajima, S

机构：

[1] ISTEC, Superconduct Res Lab, Tokyo 1350062, Japan

[2] Japan Sci & Technol Corp, Kawaguchi, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.65.214513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We extract phonon contributions from the transport properties of a MgB2 single crystal. The temperature dependence of the in-plane resistivity is well explained by the Bloch-Gruneisen formula with the Debye temperature Theta(D)similar to400 K, taking into account an additional contribution of the E-2g phonon mode (similar to890 K). In the thermoelectric power, we find a phonon drag peak around 70 K, which gives a consistent estimation of Theta(D) with the resistivity result. The pressure dependence of the in-plane resistivity reveals a major contribution of the E-2g phonon mode to superconductivity.

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页码：1 / 4

页数：4

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