Affiliation
ETH Zurich
Talk Title
Quantum spin torques on a single molecule
Abstract
Quantum technologies rely on spin state control for information processing. Traditional methods using magnetic or electric fields face scaling challenges due to delocalized fields. Spin currents offer localized manipulation via spin torques, inducing magnetization switching and high-frequency excitations. However, using spin torque to prepare quantum superposition states and drive spin precession had not previously been demonstrated. We present the first experimental demonstration of magnetic resonance of a single spin driven by a time-dependent spin-polarized current. By injecting a radio-frequency spin-polarized current from an STM tip into a pentacene molecule, we observed magnetic moment resonance. Our work enables precise quantum spin manipulation, advancing the EPR-STM technique and overcoming temperature and field response limitations.