Single-electron spin-dependent transport in split-gate structures containing self-assembled quantum dots |
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Authors: | E E Vdovin Yu N Khanin P L Shabelnikova L Eaves M Henini |
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Institution: | (1) Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia;(2) School of Physics and Astronomy, University of Nottingham, Nottingham, UK |
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Abstract: | Study of split-gate structures, in which self-assembled InAs quantum dots (QDs) are located near the region of 2D electron gas, has revealed Coulomb oscillations in the dependence of the tunnel current through a limited number of InAs QDs in a channel on the gate voltage, which correspond to the excited states of QDs with opposite spins. The Coulomb oscillations of the current were observed up to a temperature of ~20 K. The Coulomb energy ΔE C was found to be 12.5 meV, a value corresponding to the theoretical estimates for p states of QDs in our experimental structures. |
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