Circular polarization in n-type resonant tunneling diodes with Si delta-doping in the quantum wellTools Herval, L.K S., Galeti, H.V.A., Orsi Gordo, V., Galvao Gobato, Y., Brasil, M.J.S.P., Taylor, D. and Henini, M. (2014) Circular polarization in n-type resonant tunneling diodes with Si delta-doping in the quantum well. In: 29th Symposium on Microelectronics Technology and Devices (SBMicro) 2014, 1-5 September 2014, Aracaju-Sergipe, Brazil. Full text not available from this repository.
Official URL: http://dx.doi.org/10.1109/SBMicro.2014.6940126
AbstractIn this work, we have investigated magneto-transport and polarization resolved photoluminescence of a GaAs/AlGaAs resonant tunneling diode with Si delta-doping at the center of the quantum well under a magnetic field parallel to the tunnel current. Three resonant peaks were observed in the current-voltage characteristics curve (J(V)) which were associated to donor-assisted resonant tunneling, electron resonant tunneling and to phonon-assisted resonant tunneling. The optical emission from GaAs contact layers shows evidence of highly spin-polarized two-dimensional electron and hole gases which affect the spin-polarization of carriers in the well. The quantum well photoluminescence shows strong circular polarization degrees with values up to 85% under 15T at the donor assisted resonant tunneling peak voltage. Our results can be exploited for future development of voltage-controlled spintronics devices.
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