Effect of doping on global and local order in crystalline GeTe

Xavier Biquard, Milos Krbal, Alexander V. Kolobov, Paul Fons, Robert E. Simpson, B́rang̀re Hyot, Bernard Andŕ, Junji Tominaga, Tomoya Uruga

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number231907
JournalApplied Physics Letters
Volume98
Issue number23
DOIs
Publication statusPublished - 2011 Jun 6
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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