TM EDMR based magnetometry: A novel tandem (de-)modulation technique enhancing the electrical readout of the spin-dependent recombination current in SiC JFETs

A spin readout based on electrically detected magnetic resonance (EDMR) holds potential to bring quantum application into miniaturized devices e.g. as a magnetometer, yet sensitivity has remained a challenge. In this study, we present a novel tandem (de-)modulation technique based on a combination of magnetic field and radio frequency modulation. By enabling higher demodulation frequencies to avoid 1/f-noise, enhancing self-calibration capabilities, and eliminating background signals by three orders of magnitude, this technique represents a significant advancement in the field ofEDMR-based sensors. This novel approach paves the way for EDMR being the ideal candidate for ultra-sensitive magnetometry at ambient conditions without any optical components, which brings it one step closer to a chip-based quantum sensor for future applications.