Publication details
Type-II InAs/GaAsSb/GaAs Quantum Dots as Artificial Quantum Dot Molecules
| Authors | |
|---|---|
| Year of publication | 2016 |
| Type | Article in Periodical |
| Magazine / Source | ACTA PHYSICA POLONICA A |
| MU Faculty or unit | |
| Citation | |
| web | http://przyrbwn.icm.edu.pl/APP/PDF/129/a129z1ap12.pdf |
| Doi | http://dx.doi.org/10.12693/APhysPolA.129.A-62 |
| Field | Solid matter physics and magnetism |
| Keywords | quantum dots; type-II bandalignment; quantum computing; theory |
| Description | We have studied theoretically the type-II GaAsSb capped InAs quantum dots for two structures differing in the composition of the capping layer, being either (i) constant or (ii) with Sb accumulation above the apex of the dot. We have found that the hole states are segmented and resemble the states in the quantum dot molecules. The two-hole states form singlet and triplet with the splitting energy of 4 ueV/325 ueV for the case (i)/(ii). We have also tested the possibility to tune the splitting by vertically applied magnetic field. Because the predicted tunability range was limited, we propose an approach for its enhancement. |
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