Strain dependence of hole effective mass and scattering mechanism in strained Ge channel structures

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Abstract

Strain dependence of hole effective mass (m*) in the strained Ge channel was systematically studied, and monotonic m reduction by more than 20% was clearly observed when the strain increased from 0.8% up to 2.8%. The scattering mechanism, which strongly depended on the modulation-doping structure as well as strains, was also investigated based on the Dingle ratio evaluation, and the interface roughness scattering was found to be effectively suppressed by adopting the inverted structure even for the largely strained channels. © 2009 American Institute of Physics.

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Sawano, K., Toyama, K., Masutomi, R., Okamoto, T., Usami, N., Arimoto, K., … Shiraki, Y. (2009). Strain dependence of hole effective mass and scattering mechanism in strained Ge channel structures. Applied Physics Letters, 95(12). https://doi.org/10.1063/1.3229998

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