Aluminum vacancy/sulfur complex in wurtzite AlN as an optically controllable spin qubit
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2024-06-07 |
| Journal | Physical review. B./Physical review. B |
| Authors | Sergey Stolbov, Marisol AlcĂĄntara Ortigoza |
| Institutions | University of Central Florida, Tuskegee University |
| Citations | 3 |
Abstract
Section titled âAbstractâUsing our rational methodology, we reveal a defect in wurtzite AlN that can serve as an optically controllable spin qubit. It combines an Al vacancy and a S atom substituting the neighboring N atom (V<sub>Alâ˘</sub>S<sub>N</sub>). Linear response GW and Bethe-Salpeter equation calculations guide us to find suitable ground and excited triplet and singlet states of V<sub>Alâ˘</sub>S<sub>N</sub>. The obtained optical spin-polarization cycle is similar to that observed in the negative nitrogen-vacancy (NV<sup>-</sup>) center in diamond. Furthermore, the calculated optical oscillator strengths for V<sub>Alâ˘</sub>S<sub>N</sub> suggest that, in contrast to the NV<sup>-</sup> center, the optical emission in the singlet and triplet states have comparable rates, which is favorable for the qubit functionality.