@misc{SchmeisserPresselYamamotoetal., author = {Schmeißer, Dieter and Pressel, Klaus and Yamamoto, Yuji and Tillack, Bernd and Kr{\"u}ger, D.}, title = {Ge instabilities near interfaces in Si-SiGe-Si heterostructures}, series = {Materials Science \& Engineering B}, volume = {101}, journal = {Materials Science \& Engineering B}, number = {1-3}, issn = {0921-5107}, pages = {208 -- 211}, abstract = {Compositional characterization of interfaces in Si-cap/SixGe1-x/Si heterostructures is an important topic in SiGe based advanced microelectronics and in quantum wells. Extremely high depth resolution is required to detect and optimize near-interface compositional gradients which are crucial for high circuit performance. We report on non-destructive, high-resolution, near-interface depth profiling using SR photoelectron spectroscopy at an undulator beamline. We measured the Ge content at the SixGe1-x interface towards the native SiO2 layer and investigated the influence of additional (1nm and 2nm) Si capping layers (Si-cap). For the uncapped samples we found near the oxide/ SiGe interface region a strong mixing of Ge-oxides and SiOx. This indicates a high instability of the Ge atoms at those interfaces while silicon capped (1nm, 2nm) SixGe1-x films are more stable. We detect sharp Ge concentration gradients within the first 1nm at the Si/SixGe1-x interface. These results open new possibilities for Ge profile optimization in Si-cap/SixGe1-x/Si heterostructures. In the Ge3d spectra we differentiate the Ge atoms to occupy three different lattice sites and are able to follow their relative occupation within the Ge gradient.}, language = {en} } @inproceedings{ChaoBestleKruegeretal., author = {Chao, Chen-Xiang and Bestle, Dieter and Kr{\"u}ger, D. and Meissner, Bernd}, title = {Increasing the tooth root capacity of symmetric and asymmetric gears by optimizing the tooth root fillet shape}, series = {International Gear Conference 2018, Lyon, 27.-29.08.2018, vol. 1}, booktitle = {International Gear Conference 2018, Lyon, 27.-29.08.2018, vol. 1}, publisher = {Chartridge Books Oxford}, address = {Oxford}, isbn = {978-1-911033-42-4}, pages = {531 -- 541}, abstract = {The international standard ISO 6336-3 defines a calculation method for the tooth root capacity of standard gears with basic rack profile according to ISO 53. However, the results of this method may become too optimistic for non-standard gears with custom root fillets, large pressure angles or asymmetric teeth, since the effect of general mean stresses on the local tooth root strength are neglected. Therefore, a more generic calculation method is suggested, which considers the mean stress influence by utilizing the Haigh diagram. Both approaches are then used as basis of root fillet shape optimizations. A comparison of results demonstrates significant differences in the safety assessment and the resulting root geometry.}, language = {en} } @misc{ReipHaringSiboldetal., author = {Reip, A. and Haring, B. and Sibold, C. and Stohwasser, Ralf and Bautz, Ekkehard K. F. and Darai, Gholamreza and Meisel, H. and Kr{\"u}ger, D. H.}, title = {Coding strategy of the S and M genomic segments of a hantavirus representing a new subtype of the Puumala serotype}, series = {Archives of Virology}, volume = {141}, journal = {Archives of Virology}, number = {11}, issn = {0304-8608}, doi = {10.1007/BF01322689}, pages = {2011 -- 2026}, language = {en} }