Lew, C. T.K.Sewani, V. K.Iwamoto, N.Ohshima, T.McCallum, J. C.Johnson, B. C.2025-03-242025-03-24Scopus:85189341396PubMed:38640398https://dspace-test.anu.edu.au/handle/1885/733733104Spin defects in silicon carbide are promising candidates for quantum sensing applications as they exhibit long coherence times even at room temperature. However, spin readout methods that rely on fluorescence detection can be challenging due to poor photon collection efficiency. Here, we demonstrate coherent spin control and all-electrical readout of a small ensemble of spins in a SiC junction diode using pulsed electrically detected magnetic resonance. A lock-in detection scheme based on a three stage modulation cycle is implemented, significantly enhancing the signal-to-noise ratio. This technique enabled observation of coherent spin dynamics, specifically Rabi spin nutation, spin dephasing, and spin decoherence. The use of these protocols for magnetometry applications is evaluated.The authors thank D. L. Creedon, S. Gregory, and S. A. Yanni for their technical support during the development and construction of the low-field EDMR spectrometer. C. T.-K. Lew acknowledges the Australian Government Research Training Program Scholarship. T. O. acknowledges JSPS KAKENHI No. 21H04553 and No. 20H00355.EnglishPublisher Copyright: © 2024 American Physical Society.2024-04-0510.1103/PhysRevLett.132.146902http://www.scopus.com/inward/record.url?scp=85189341396&partnerID=8YFLogxK