Theory of Short-Range Order and Disorder in Tetrahedrally Bonded Semiconductors

Abstract

Publisher Summary The chapter presents a study on theory of short-range order and disorder in tetrahedrally bonded semiconductors. The chapter presents discussion on tetrahedral crystalline and amorphous semiconductors and relationships between the two. A spectrum of research in this area is reviewed, which contains some of the most rapidly developing and fruitful research in the “amorphous semiconductor” area. The ideas and results have wide applications and ramifications. Emphasis has been put on theoretical methods which explore the short range order and disorder characteristics of amorphous solids. In particular, special attention is placed on methods involving complex crystalline and “cluster-Bethe lattice” models. These methods were “featured” and used as a structure to develop fundamental ideas and concepts. The chapter presents a discussion on the roles of short-range order (SRO), long-range order (LRO), short-range disorder (SRD), and long-range disorder (LRD). Short-range environment is the dominant feature reflected in the density of states and optical properties. Most models of amorphous solids usually fall into two general categories—namely, microcrystallite and random network.