About the module
Recent advances in techniques for investigating magnetic properties at micro- and nanometre scales have created new opportunities in condensed-matter research. Quantum sensors based on atomic defects use quantum-state dynamics to measure quantities such as magnetic field, temperature and pressure while combining high sensitivity with spatial resolution. Nitrogen-vacancy (NV) centres in diamond are among the leading platforms for investigating magnetic phenomena at these scales.
Participants will work with experimental quantum-magnetometry techniques for characterizing magnetic nanostructures. After an introduction to spin-defect sensors and to the optical and magnetic-resonance techniques used for initialization, manipulation and readout, they will map fields generated by predefined magnetic nanostructures using NV centres in diamond and spin defects in hBN. Experimental field maps will then be related to the magnetic and geometrical properties of the samples.
Syllabus
- Fundamentals of quantum magnetometry based on spin defects in solids.
- NV centres in diamond as magnetic-field sensors.
- Introduction to optically detected magnetic resonance (ODMR).
- Acquisition and analysis of ODMR spectra.
- Calibration of the sensor response to magnetic fields.
- Magnetic nanostructures.
- Magnetization reconstruction.
Prerequisites
No prerequisites.
Bibliography
- V. K. Sewani et al., Coherent control of NV− centers in diamond in a quantum teaching lab, American Journal of Physics 88, 1156 (2020).
- L. Rondin et al., Magnetometry with nitrogen-vacancy defects in diamond, Reports on Progress in Physics 77, 056503 (2014).