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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