Electrically detected magnetic resonance of $^{75}$As magnetic clock transitions in silicon
Ravi Acharya, Shao Qi Lim, Brett C. Johnson, Nicholas Gillespie, Christopher T. -K. Lew + 7 more
TLDR
Researchers observed magnetic clock transitions in $^{75}$As spins in silicon using low-field EDMR, crucial for quantum computing.
Key contributions
- Observed magnetic clock transitions (CTs) in near-surface $^{75}$As spins in silicon.
- Employed low-field continuous-wave electrically detected magnetic resonance (EDMR).
- Noted pronounced linewidth broadening near CTs, consistent with a donor Hamiltonian model.
- Validates low-field EDMR as a sensitive probe for CTs in silicon quantum devices.
Why it matters
Magnetic clock transitions are vital for suppressing decoherence in quantum systems. This work demonstrates a new method using low-field EDMR to observe these transitions in silicon, advancing the development of robust silicon-based quantum devices.
Original Abstract
Magnetic clock transitions (CTs), defined by vanishing first-order sensitivity of the transition frequency to magnetic field fluctuations, provide a powerful route to suppress decoherence in donor spin systems. Here, we present the observation of magnetic field CTs from an ensemble of near-surface $^{75}$As ($I = 3/2$) spins in silicon using low-field ($< 10$~mT) continuous-wave electrically detected magnetic resonance (EDMR). As the CT condition is approached, pronounced linewidth broadening is observed, consistent with a donor Hamiltonian informed linewidth model. These results establish low-field EDMR as a sensitive probe of CTs in near-surface donor systems relevant to silicon-based quantum devices.
📬 Weekly AI Paper Digest
Get the top 10 AI/ML arXiv papers from the week — summarized, scored, and delivered to your inbox every Monday.