Transformation from molecular to polymeric nitrogen at high pressures and temperatures: In situ x-ray diffraction study
We studied the mechanism of the structural transformation of molecular nitrogen to atomic single-bonded nitrogen with a cubic gauche (cg-N) crystal structure using x-ray diffraction in situ at a press...
We studied the mechanism of the structural transformation of molecular nitrogen to atomic single-bonded nitrogen with a cubic gauche (cg-N) crystal structure using x-ray diffraction in situ at a press...
Improved performance of Schottky diodes on pendeoepitaxial gallium nitride
We designed experiments to investigate the role of dislocation density on the performance of Schottky diodes fabricated on a GaN material grown conventionally and by pendeo-epitaxy. Devices of varying...
We designed experiments to investigate the role of dislocation density on the performance of Schottky diodes fabricated on a GaN material grown conventionally and by pendeo-epitaxy. Devices of varying...
Theory of grain boundary diffusion induced by the Kirkendall effect
Appl. Phys. Lett. 93, 091908 (2008); doi:10.1063/1.2978161
Published 5 September 2008
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A set of coupled diffusion equations is numerically solved to demonstrate that grain boundary diffusion is significantly enhanced when diffusing atomic species have dissimilar atomic hop frequencies in the bulk. The model is based on a rigorous treatment of two-component substitutional diffusion where vacancies are treated as an additional species. By examining the concentration fields and the eigenvalues of the diffusivity matrix, the origin of the enhanced grain boundary diffusion is explained in terms of the Kirkendall effect.
©2008 American Institute of Physics
| History: | Received 30 June 2008; accepted 15 August 2008; published 5 September 2008 |
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REFERENCES (16)
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