| HOLÝ, Václav, T. BAUMBACH, D. LÜBBERT, L. HELFEN, M. ELLYAN, Petr MIKULÍK, S. KELLER, S.P. DENBAARS and J. SPECK. Diffuse x-ray scattering from statistically inhomogeneous distributions of threading dislocations beyond the ergodic hypothesis. Physical Review B. USA: The American Physical Society, 2008, vol. 77, No 1, p. 094102-94110. ISSN 1098-0121. |
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@article{766892,
author = {Holý, Václav and Baumbach, T. and Lübbert, D. and Helfen, L. and Ellyan, M. and Mikulík, Petr and Keller, S. and DenBaars, S.P. and Speck, J.},
article_location = {USA},
article_number = {1},
keywords = {X-ray diffraction; X-ray topography; Microdiffraction; Rocking curve imaging; Dislocations; GaN},
language = {eng},
issn = {1098-0121},
journal = {Physical Review B},
title = {Diffuse x-ray scattering from statistically inhomogeneous distributions of threading dislocations beyond the ergodic hypothesis},
url = {http://www.sci.muni.cz/~mikulik/Publications.html#HolyBaumbachLubbert-PRB-2008},
volume = {77},
year = {2008}
}
TY - JOUR
ID - 766892
AU - Holý, Václav - Baumbach, T. - Lübbert, D. - Helfen, L. - Ellyan, M. - Mikulík, Petr - Keller, S. - DenBaars, S.P. - Speck, J.
PY - 2008
TI - Diffuse x-ray scattering from statistically inhomogeneous distributions of threading dislocations beyond the ergodic hypothesis
JF - Physical Review B
VL - 77
IS - 1
SP - 094102
EP - 094102
PB - The American Physical Society
SN - 10980121
KW - X-ray diffraction
KW - X-ray topography
KW - Microdiffraction
KW - Rocking curve imaging
KW - Dislocations
KW - GaN
UR - http://www.sci.muni.cz/~mikulik/Publications.html#HolyBaumbachLubbert-PRB-2008
N2 - Diffuse x-ray scattering from threading dislocations in epitaxial structures is simulated numerically by a Monte Carlo method. The method allows one to simulate diffraction curves for dislocation types, where macroscopic approaches fail. That includes dislocation types for which analytical ensemble averaging is not feasible as well as microdiffraction curves from small sample volumes. In the latter case, the degree of statistic fluctuation of characteristic features is determined. The Monte Carlo method makes it possible to correlate quantitatively the widths of the microdiffraction curves to the densities of various dislocation types. The potential of the method has been demonstrated by a quantitative estimation of the density distribution of edge and screw threading dislocations in laterally overgrown epitaxial GaN structures, which is investigated by a full-field microdiffraction imaging technique. Measuring the asymptotic behavior of the microdiffraction curves allows one to conclude on the prevailing type of threading dislocations.
ER -
HOLÝ, Václav, T. BAUMBACH, D. LÜBBERT, L. HELFEN, M. ELLYAN, Petr MIKULÍK, S. KELLER, S.P. DENBAARS and J. SPECK. Diffuse x-ray scattering from statistically inhomogeneous distributions of threading dislocations beyond the ergodic hypothesis. \textit{Physical Review B}. USA: The American Physical Society, 2008, vol.~77, No~1, p.~094102-94110. ISSN~1098-0121.
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