1. Effects of Be acceptors on the spin polarization of carriers in p-i-n resonant tunneling diodes.
- Author
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Awan, I. T., Galeti, H. V. A., Galvão Gobato, Y., Brasil, M. J. S. P., Taylor, D., and Henini, M.
- Subjects
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BERYLLIUM , *SPIN polarization , *ELECTROLUMINESCENCE , *RESONANT tunneling diodes , *QUANTUM wells , *ELECTRON paramagnetic resonance , *SPINTRONICS - Abstract
In this paper, we have investigated the effect of Be acceptors on the electroluminescence and the spin polarization in GaAs/AlAs p-i-n resonant tunneling diodes. The quantum well emission comprise two main lines separated by ~20meV attributed to excitonic and Be-related transitions, which intensities show remarkably abrupt variations at critical voltages, particularly at the electron resonant peak where it shows a high-frequency bistability. The circular-polarization degree of the quantum-well electroluminescence also shows strong and abrupt variations at the critical bias voltages and it attains relatively large values (of ~–75% at 15 T). These effects may be explored to design novel devices for spintronic applications such as a high-frequency spin-oscillators. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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