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    Growth of strained InGaSb quantum wells for p-FET on Si: Defects, interfaces, and electrical properties

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    Date
    2014
    Author
    Madisetti, Shailesh
    Tokranov, Vadim
    Greene, Andrew
    Yakimov, Michael
    Hirayama, Makoto
    Oktyabrsky, Serge
    Publisher
    Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena
    Metadata
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    Subject
    heteroepitaxial molecular beams
    epitaxy
    InGaSb quantum well
    migration enhanced epitaxy technique
    atomic force microscopy
    Auger electron spectroscopy
    growth-related defects
    threading dislocations
    microtwins
    antiphase boundaries
    surface morphology
    defect density
    Abstract
    A study of heteroepitaxial molecular beam epitaxy growth of strained p-channel InGaSb quantum well (QW) on lattice mismatched Si (100) using Al(Ga)Sb metamorphic buffers is presented in this paper. The migration enhanced epitaxy (MEE) technique was employed for AlSb nucleation layer (NL) on Si and analyzed using atomic force microscopy and in-situ Auger electron spectroscopy techniques to optimize growth conditions for continuous 2D buffer layers and improve surface quality of subsequent layers. Growth-related defects (threading dislocations, microtwins, and antiphase boundaries) and their effect on surface morphology and electrical properties of the QWs are analyzed with scanning electron microscope and transmission electron microscopy and correlated to the NL properties. The baseline data for defect density in the layers and resultant surface morphology are presented. Room temperature p-channel Hall mobility of 660 cm2 /V s at 3 x 1011 cm-2 sheet hole concentration is achieved in InGaSb QWs using an optimized 15 monolayer AlSb MEE NL at 300 degrees C growth temperature.
    URI
    http://hdl.handle.net/1951/68883
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    • SUNY Polytechnic Institute Faculty and Staff Research, Publications, and Creative Works [63]

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