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

doi:10.1063/1.3598384

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 journal › Article › peer-review

22 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 language	English
Article number	231907
Journal	Applied Physics Letters
Volume	98
Issue number	23
DOIs	https://doi.org/10.1063/1.3598384
Publication status	Published - 2011 Jun 6
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3598384

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title = "Effect of doping on global and local order in crystalline GeTe",

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.",

author = "Xavier Biquard and Milos Krbal and Kolobov, {Alexander V.} and Paul Fons and Simpson, {Robert E.} and {\'B}ran{\`g}re Hyot and Bernard And{\'r} and Junji Tominaga and Tomoya Uruga",

note = "Funding Information: XRD measurements were done at ESRF at beamline BM32 as part of IHR beamtime. XAFS measurements were performed at beamline BL01B1 as part of Proposal No. 2010B1107. M.K. acknowledges support from the Japanese Society for Promotion of Science. The authors express their thanks to Anne Roule (CEA, Leti) for the sample preparation. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

year = "2011",

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doi = "10.1063/1.3598384",

language = "English",

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journal = "Applied Physics Letters",

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T1 - Effect of doping on global and local order in crystalline GeTe

AU - Biquard, Xavier

AU - Krbal, Milos

AU - Kolobov, Alexander V.

AU - Fons, Paul

AU - Simpson, Robert E.

AU - Hyot, B́rang̀re

AU - Andŕ, Bernard

AU - Tominaga, Junji

AU - Uruga, Tomoya

N1 - Funding Information: XRD measurements were done at ESRF at beamline BM32 as part of IHR beamtime. XAFS measurements were performed at beamline BL01B1 as part of Proposal No. 2010B1107. M.K. acknowledges support from the Japanese Society for Promotion of Science. The authors express their thanks to Anne Roule (CEA, Leti) for the sample preparation. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2011/6/6

Y1 - 2011/6/6

N2 - 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.

AB - 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.

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Effect of doping on global and local order in crystalline GeTe

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