Abstract

Magnetic resonance spectroscopy offers a way to probe electronic spin states either directly, through absorption and emission of electromagnetic radiation, or indirectly, through a change in macroscopic observables such as electrical conductivity or light emission intensity. The higher the frequency of the resonant radiation, the greater the spectral resolution achievable, enabling a differentiation between hyperfine and spin-orbit coupling (SOC) induced spectral broadening. Using a custom-designed 350 GHz spectrometer, we will investigate SOC effects in materials with very weak nominal SOC, such as organic semiconductors.