28 August 2014 Spin-resolved study of direct band-gap recombination in bulk Ge
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Recent investigations have demonstrated how temperature and doping can be employed as effective turning knobs to fully control the angular momentum of the photons emitted at the direct gap recombination of carriers with optically oriented spin in bulk Germanium. Here we emphasize how cooling of hot electrons via Coulomb collisions and intervalley scattering affect spin distribution within the conduction band, and explore the role of an additional degree of freedom, namely the excitation power density, in contributing to the electron spin relaxation.
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Fabio Pezzoli, Fabio Pezzoli, Anna Giorgioni, Anna Giorgioni, Giovanni Isella, Giovanni Isella, Sebastiano De Cesari, Sebastiano De Cesari, Emanuele Grilli, Emanuele Grilli, Mario Guzzi, Mario Guzzi, "Spin-resolved study of direct band-gap recombination in bulk Ge", Proc. SPIE 9167, Spintronics VII, 91670H (28 August 2014); doi: 10.1117/12.2061795; https://doi.org/10.1117/12.2061795

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