Electrically detected magnetic resonance of $^{75}$As magnetic clock transitions in silicon

• URL: http://arxiv.org/abs/2604.24090v1
• Date: Mon, 27 Apr 2026 06:30:07 GMT
• Title: Electrically detected magnetic resonance of $^{75}$As magnetic clock transitions in silicon
• Abstract summary: Magnetic clock transitions (CTs) provide a powerful route to suppress decoherence in donor spin systems.<n>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)<n>These results establish low-field EDMR as a sensitive probe of CTs in near-surface donor systems relevant to silicon-based quantum devices.
• Score: 29.039962620404822
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• 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.

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