Abstract and Keywords
This article describes the applications of Si/SiGe heterostructures in nanoelectronics. Silicon-germanium is now a mature field with heterojunction bipolar transistors (HBTs) and complementary metal oxide semiconductors (CMOS) products in the market place. In the research field there are many areas where Si/SiGe heterostructures are being used to bandgap engineer nanoelectronic devices resulting in significant improvements in device performance. A number of these areas have good potential for eventually reaching production, while thereare also many that allow fundamental research on the physics of materials anddevices. This article begins with an overview of the growth of silicon-germanium alloys, followed by a discussion of the effect of strain on the band structure and properties of Si/SiGe devices. It then considers two mainstream nanoelectronic applications of Si/SiGe heterostructures, namely HBTs and CMOS. It also looks at resonant tunnelling diodes and SiGe quantum cascade emitters.
Keywords: Si/SiGe heterostructures, nanoelectronics, heterojunction bipolar transistors, complementary metal oxide semiconductors, nanoelectronic devices, silicon-germanium alloys, strain, band structure, resonant tunnelling diodes, quantum cascade emitters
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