Materials Research Lecture
Spalding Laboratory 106 (Hartley Memorial Seminar Room)
Self-Assembled Nanostructures in Mixed III-V and III- N Epitaxial Layers and their Influence on Devices
Subhash Mahajan,
Distinguished Professor and Special Adviser to the Chancellor ,
University of California, Davis,
The III-V materials and group III nitrides crystallize, respectively, in the zinc-blende (ZB) and wurtzitic (WZ) structures. The ZB and WZ structures consist of two interpenetrating FCC and HCP sub- lattices, respectively. The group III atoms occupy one sub-lattice, whereas the group V atoms reside on the second sub-lattice. The question is if atoms in mixed layers are distributed at random on their respective sub-lattices or not. Our results indicate that they are not. Two types of deviations from randomness are observed: phase separation and atomic ordering. The salient features of self-assembled nanostructures resulting from phase separation and ordering will be presented. Their influence on electronic and optical properties and devices will be discussed. It will be argued that microstructure of an active layer of a device must be tailored for its optimal performance.
For more information, please contact Christy Jenstad by phone at 8124 or by email at [email protected].
Event Series
Materials Research Lecture Series
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