Enhanced Rashba effect for hole states in a quantum dot

Details Enhanced Rashba effect for hole states in a quantum dot Enhanced Rashba effect for hole states in a quantum dot

2009-09-17

arxiv.org/abs/0909.3318v2

EPL, 88 (2009) 17003

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted for publication in EPL

Scientific paper

10.1209/0295-5075/88/17003

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.

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