Marta Prada

Si/InAs Composite Channels: Low Effective Mass and Direct Bandgap Structures

Si/InAs Composite Channels: Low Effective Mass and Direct Bandgap Structures Marta Prada, Neerav Kharche, Gerhard Klimeck

Objective:

  • Composite channels consist of Si/InAs QW of varying InAs widths
  • Improve the Si effective mass and bandgap delta

Approach:

  • Consider 8nm QW: Si(8-x)nm/ InAs xnm and use NEMO-3D to compute dispersion relations and:
    • Calculate delta as a function of x
    • Obtain the effective mass m*

Result

  • Both delta and m* decrease as a function of InAs content, x

Publication

  • MRS Conference Proceeding 2007
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Marta Prada's Pages

Biography Si/InAs Composite Channels: Low Effective Mass and Direct Bandgap Structures Spin-Orbit Coupling (SOC) Parameters in Si/SiGe QWs: Structure (SIA) and Bulk (BIA) Inversion Asymmetry