Positional disorder of Ba in the thermoelectric germanium clathrate Ba6Ge25

被引：12

作者：

Petkov, V

Vogt, T

机构：

[1] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA

[2] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 127卷 / 01期

基金：

美国国家科学基金会;

关键词：

Ba6Ge25; X-ray scattering; local structure;

D O I：

10.1016/S0038-1098(03)00372-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The local structure of Ba6Ge25 has been studied by X-ray diffraction and the atomic pair distribution function technique at 40 K and room temperature. Unambiguous evidence has been found showing that two out of three types of Ba atoms in Ba6Ge25 move off their positions and become locked in split sites at low temperatures. (C) 2003 Elsevier Science Ltd. All rights reserved.

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页码：43 / 46

页数：4

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