The effect of Rashba spin-orbit (SO) interaction on the hole states in a quantum dot is studied in the presence of an external magnetic field. We demonstrate here that the Rashba SO coupling has a profound effect on the energy spectrum of the holes revealing level repulsions between the states with the same total momentum. We also show that the resulting spin-orbit gap is much larger than the corresponding one for the electron energy levels in a quantum dot. Inter-hole interactions only marginally reduce the spin-orbit gap. This enhanced Rashba effect would manifest itself in the tuneling current which depends on the spin-orbit coupling strength.
@article{arxiv.0909.3318,
title = {Enhanced Rashba effect for hole states in a quantum dot},
author = {Aram Manaselyan and Tapash Chakraborty},
journal= {arXiv preprint arXiv:0909.3318},
year = {2009}
}