Large displacement of germanium atoms in crystalline Ge2Sb2Te5 -: art. no. 081904

被引：49

作者：

Shamoto, S ^{[1
]}

Yamada, N

Matsunaga, T

Proffen, T

Richardson, JW

Chung, JH

Egami, T

机构：

[1] Japan Atom Energy Res Inst, Neutron Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[2] Matsushita Elect Ind Co Ltd, Storage Media Syst Dev Ctr, Moriguchi, Osaka 5708501, Japan

[3] Matsushita Technores Inc, Characterizat Technol Grp, Moriguchi, Osaka 5708501, Japan

[4] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1861976

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Local structure of NaCl-type crystalline Ge2Sb2Te5 has been studied by the atomic pair distribution function analysis of pulsed neutron powder diffraction data. We have found the large displacement of germanium atoms in this crystalline phase. Usually,, such a large lattice distortion has disadvantages for the electric conductivity. The electronic band structure, however, implies that this significant distortion in addition to the lattice defect at Na site reduces only thermal conductivity, while the highly ordered tellurium atoms at Cl site keep high electric conductivity. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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