caa a22 4500 469092092 CHVBK 20180323133020.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF02660404 doi (NATIONALLICENCE)springer-10.1007/BF02660404 Breen Kathleen Center for Nondestructive Evaluation Maryland Hall, Room 102, The Johns Hopkins University, 21218, Baltimore, MD aut Weak-beam stereomicrography of defects in GaAs/In x Ga1− x As interfaces [Elektronische Daten] [Kathleen Breen] Weak-beam stereomicrography was used to image dislocation arrays at the two interfaces in GaAs/In x Ga1−x As/GaAs sandwich structures. For samples with mismatch equal to 1.8%, separate dislocation arrays were found at each interface. The measured dislocation density at the upper interface was only 10% of the density found at the lower interface. This is attributed to reduced mismatch at the upper interface due to strain in the In0.25Ga0.75As layer. Also, the dislocation spacing asymmetry along the [01l] and [01l] directions is exhibited at each interface. In the upper interface, it is attributed to growth on asymmetrically strained In0.25Ga0.75As. Stereo-imaging of samples with higher mismatch (f = 2.9%) showed 3-dimensional details of dislocation half-loop nucleation that leads to a semiorthogonal array with increasing In0.4Ga0.6As layer thickness. TMS, 1992 Lattice mismatch nationallicence TEM nationallicence Dislocation arrays nationallicence Journal of Electronic Materials Springer-Verlag 21/4(1992-04-01), 409-418 0361-5235 21:4<409 1992 21 11664 https://doi.org/10.1007/BF02660404 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02660404 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Breen Kathleen Center for Nondestructive Evaluation Maryland Hall, Room 102, The Johns Hopkins University, 21218, Baltimore, MD aut NATIONALLICENCE 773 0- Journal of Electronic Materials Springer-Verlag 21/4(1992-04-01), 409-418 0361-5235 21:4<409 1992 21 11664 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer