We present the basic properties of a physical system: an individual ${\mathrm{V}}^{2+}$ ion embedded into an individual quantum dot. The system is realized utilizing molecular beam epitaxy and it is observed using a low-temperature polarization-resolved magnetophotoluminescence. The nature of the system is confirmed by observation of the excitonic lines split due to the interactions of a vanadium ion with carriers confined in a CdTe/ZnTe quantum dot. Observed data are explained by the numerical modeling which includes an $s,p\text{−}d$ exchange interaction, Zeeman splitting of the exciton and the ion, a diamagnetic shift, and the presence of shear strain within the quantum dot. The fundamental state of vanadium exhibits a spin $\pm \frac{1}{2}$, making this system a textbook localized qubit.

Close

PrevNext

View figure in article

• Diamagnetism
• Doping effects
• Jahn-Teller effect
• Spin-orbit coupling
• Trions
• Dilute magnetic semiconductors
• II-VI semiconductors
• Quantum dots
• Qubits
• Molecular beam epitaxy
• Photoluminescence