Effect of doping on global and local order in crystalline GeTe

被引：19

作者：

Biquard, Xavier ^{[2
]}

Krbal, Milos ^{[3
]}

Kolobov, Alexander V. ^{[1
]}

Fons, Paul ^{[4
]}

Simpson, Robert E. ^{[4
]}

Hyot, Berangere ^{[4
]}

Andre, Bernard ^{[4
]}

Tominaga, Junji ^{[4
]}

Uruga, Tomoya ^{[4
]}

机构：

[1] Japan Synchrotron Radiat Inst JASRI, SPring8, Sayo, Hyogo 6795148, Japan

[2] CEA INAC, SP2M, F-38054 Grenoble 9, France

[3] Natl Inst Adv Ind Sci & Technol, Nanodevice Innovat Res Ctr, Tsukuba, Ibaraki 3058562, Japan

[4] CEA Leti MINATEC, SIONA, DOPT, Lab Technol Nanophoton, F-38054 Grenoble 9, France

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 23期

关键词：

D O I：

10.1063/1.3598384

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Effect of nitrogen and carbon doping on the structure of GeTe has been investigated using x-ray diffraction and extended x-ray absorption fine structure (EXAFS) spectroscopies. While Bragg diffraction which probes the global structure exhibits a clear transition upon doping from the rhombohedral phase to the cubic (rocksalt) phase, the local structure probed by EXAFS remains rhombohedrally distorted across the compositions studied. The apparent inconsistency between the results of the two techniques used is attributed to disordering upon doping and the resulting order-disorder transition that is "seen" by site-averaging diffraction as a displacive rhombohedral-to-cubic transition. (C) 2011 American Institute of Physics. [doi:10.1063/1.3598384]

引用

页数：3

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