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Developing silicon carbide for quantum spintronics

https://doi.org/10.1063/5.0004454

Son, Nguyen T. ; Anderson, Christopher P. ; Bourassa, Alexandre ; Miao, Kevin C. ; Babin, Charles ; Widmann, Matthias ; Niethammer, Matthias ; Ul Hassan, Jawad ; Morioka, Naoya ; Ivanov, Ivan G. ; et al ( May 2020 , Applied Physics Letters)

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Electrical and optical control of single spins integrated in scalable semiconductor devices

https://doi.org/10.1126/science.aax9406

Anderson, Christopher P. ; Bourassa, Alexandre ; Miao, Kevin C. ; Wolfowicz, Gary ; Mintun, Peter J. ; Crook, Alexander L. ; Abe, Hiroshi ; Ul Hassan, Jawad ; Son, Nguyen T. ; Ohshima, Takeshi ; et al ( December 2019 , Science)

Spin defects in silicon carbide have the advantage of exceptional electron spin coherence combined with a near-infrared spin-photon interface, all in a material amenable to modern semiconductor fabrication. Leveraging these advantages, we integrated highly coherent single neutral divacancy spins in commercially available p-i-n structures and fabricated diodes to modulate the local electrical environment of the defects. These devices enable deterministic charge-state control and broad Stark-shift tuning exceeding 850 gigahertz. We show that charge depletion results in a narrowing of the optical linewidths by more than 50-fold, approaching the lifetime limit. These results demonstrate a method for mitigating the ubiquitous problem of spectral diffusion in solid-state emitters by engineering the electrical environment while using classical semiconductor devices to control scalable, spin-based quantum systems.

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Isolated Spin Qubits in SiC with a High-Fidelity Infrared Spin-to-Photon Interface

https://doi.org/10.1103/PhysRevX.7.021046

Christle, David J. ; Klimov, Paul V. ; de las Casas, Charles F. ; Szász, Krisztián ; Ivády, Viktor ; Jokubavicius, Valdas ; Ul Hassan, Jawad ; Syväjärvi, Mikael ; Koehl, William F. ; Ohshima, Takeshi ; et al ( June 2017 , Physical Review X)