Electron-phonon renormalization and phonon anharmonicity in metals

被引：5

作者：

Zhang, Peihong ^{[1
]}

Xue, Yu ^{[1
]}

Dev, Pratibha ^{[1
]}

机构：

[1] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA

来源：

SOLID STATE COMMUNICATIONS | 2008年 / 148卷 / 3-4期

关键词：

Electron-phonon; Anharmonicity;

D O I：

10.1016/j.ssc.2008.07.034

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electron-phonon renormalization and phonon anharmonicity in metals are investigated by employing density functional theory based first-principles electronic structure methods. Using doped silicon, diamond, and MgB2 as examples, it is shown that phonon anharmonicity may be significantly renormalized by electron-phonon interactions, especially for phonon modes that couple strongly with electrons. The unusually large third-order anharmonic potential of the E-2g phonon in MgB2 is largely due to the electron-phonon renormalization effect. (C) 2008 Elsevier Ltd. All rights reserved.

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页码：151 / 154

页数：4

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