Enhanced Rashba effect for hole states in a quantum dot

Abstract

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.

Accepted for publication in EPL

References in corpus (14)

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Cited by in corpus (10)

• Electrical control over single hole spins in nanowire quantum dots
• Spin-orbit interactions in inversion-asymmetric 2D hole systems: a variational analysis
• Spin-orbit coupling and magnetic field dependence of carriers states in a self-assembled quantum dot
• Strong Enhancement of Rashba spin-orbit coupling with increasing anisotropy in the Fock-Darwin states of a quantum dot
• Tuning of Exciton States in a Magnetic Quantum Ring
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Spin interactions in a quantum dot containing a magnetic impurity
• Super-intense highly anisotropic optical transitions in anisotropic quantum dots
• Spin-orbit Interaction induced Singlet-Triplet Resonant Raman Transitions in Quantum-dot Helium
• Spin-orbit coupling and spin relaxation of hole states in [001]- and [111]-orientedquantum dots of various geometry