Abstract
We study the spin-splitting energies in low-potential-barrier quantum dots, finding splitting energies that are orbital state dependent. The theoretical analysis is done with a generalization of the Fock-Darwin states in the presence of spin-orbit interactions. We discuss experimental evidence indicating that the Rashba interaction strength in vertical InGaAs/GaAs quantum dots is in the range 80 meV Å 120 meV Å. This enhanced spin-orbit interaction can be understood from the high penetration of the electron wave function into the quantum well with low-potential barrier.
- Received 1 March 2011
DOI:https://doi.org/10.1103/PhysRevB.84.085325
©2011 American Physical Society