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Enhanced indirect-to-direct inter-valley scattering in germanium under tensile strain for improving the population of electrons in direct valley
Journal of Physics: Condensed Matter
A theoretical model is proposed to analyze the inter-valley electron transferring between direct Γ and indirect L valleys, which sheds light on the electron conduction dynamics in (0 0 1) tensile strained Ge. Inter-valley scattering is included to calculate average scattering time between Γ and L valleys based on a time-dependent Hamiltonian describing the electronphonon interaction. Numerical results indicate that enhanced indirect-to-direct inter-valley scattering and reduceddoi:10.1088/1361-648x/aae50e fatcat:u5awmz6bl5gzxkr3qtikkf27gy