“Quantum sensing and imaging with diamond defect centers for nano-scale spin physics”

Dr. Donghun Lee
Department of Physics, Korea University

Nov. 9 (Fri.), 04:00 PM
E6-2. 1st fl. #1323

Abstract:
Probing and imaging magnetism at nanometer scale with high field sensitivity is of great interest in a wide range of fields, including solid-state physics, materials science and biomedical applications. In this talk, I will introduce a novel scanning magnetometer based on nitrogen-vacancy (NV) defect center in diamond. The diamond NV center has promising potential for nanometer and nanotesla magnetometry due to its atomic-scale size, long spin coherence times and high magnetic field sensitivity (e.g. < nT/Hz1/2). Since these properties are robust against a wide range of operating temperature, it is also suitable for studying novel magnetic materials exhibiting temperature-dependent magnetic orders. I will present basic working principle of quantum sensing and imaging with diamond NV centers and examples of imaging magnetic samples including current devices and room temperature skyrmion.