| Issue |
EPL
Volume 88, Number 1, October 2009
|
|
|---|---|---|
| Article Number | 17003 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/88/17003 | |
| Published online | 16 October 2009 | |
Enhanced Rashba effect for hole states in a quantum dot
Department of Physics and Astronomy, University of Manitoba - Winnipeg, Canada R3T 2N2
Corresponding author: chakrabt@cc.umanitoba.ca
Received:
14
July
2009
Accepted:
17
September
2009
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.
PACS: 73.21.La – Quantum dots / 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect / 75.75.+a – Magnetic properties of nanostructures
© EPLA, 2009
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