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Electric field effect in the spin dynamics of self-assembled InAs/GaAs quantum dots |
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| Authors: | AFG Monte PC Morais M Hopkinson |
| Institution: | 1. Universidade Federal de Uberlândia, Instituto de Física, Uberlândia-MG 38400-902, Brazil;2. Universidade de Brasilia, Instituto de Física, Brasília-DF 70910-900, Brazil;3. University of Sheffield, Department of Electronic and Electrical Engineering, Sheffield S1 3JD, S. Yorkshire, England |
| Abstract: | We identify fundamental mechanisms of electron and hole dynamics in self-organized InAs/GaAs quantum dots (QDs) subject to vertical electric fields by photocurrent investigations. We propose a spin–flip mechanism involving a spin exchange between neighboring QDs. The spin–flip process is revealed in the photocurrent dynamics when the exciton population increases unexpectedly with reverse bias. |
| Keywords: | 78 67 Hc 73 21 La 73 63 Kv 78 55 &minus m 75 55 Cr 73 40 Kp |
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