| Abstract Scope |
The continuing miniaturization of semiconductor chips with ever-increasing functionality is driven by understanding point, line, and extended defects and the new functionalities that they may offer. In addition to providing key “designer impurities”, point defects may be harnessed for quantum information. Line and extended defects often limit the performance of electronics but they may also provide new opportunities in electronics, optoelectronics, and photovoltaics. We seek nanoscale to mesoscale understanding and control of point, line, and extended defects in semiconductors. In this talk, I will first discuss our studies of solute incorporation mechanisms in highly mismatched alloys that consist of highly immiscible solute atoms in a solvent. I will then describe our studies of semiconductor polytype heterostructures, which are chemically homogeneous structures exhibiting an abrupt transition in crystal structure. Finally, I will describe recent work illustrating additional conducting pathways through twin boundaries in narrow gap semiconductors that are also topological insulators. |