Abstract
We report electron transport properties of modulation-doped Si/SiGe at 300 and 77 K. Record mobilities of 2830 and 18 000 cm2/V s at 300 and 77 K, respectively, have been measured. Depending on the spacer layer thickness, the sheet resistance of the Si channel is in the range of 2000–10 000 Ω/⧠ at 300 K and 450–700 Ω/⧠ at 77 K. The low field electron drift velocity is 2–3 (5–10) times higher than the corresponding velocity measured in Si/SiO2 structures at 300 K (77 K). The saturation velocity is measured to be only 5% higher than in bulk Si, at both 300 and 77 K, but appears at a lower electric field. The effect of the enhanced transport properties in modulation-doped Si/SiGe on device design and performance is investigated.
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@article{Ismail_1993, title={Electron transport properties of Si/SiGe heterostructures: Measurements and device implications}, volume={63}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.109949}, DOI={10.1063/1.109949}, number={5}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Ismail, K. and Nelson, S. F. and Chu, J. O. and Meyerson, B. S.}, year={1993}, month=aug, pages={660–662} }