2015/12/05 by P. Schattschneider, Schattschneider, Peter, Vincenzo Grillo +1
Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #Surface and Thin Film Phenomena
paper · pdf · doi:10.48550/arxiv.1512.01678
openalex publication_date 2015/12/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The theoretical possibility to use an electron microscope as a spin polarizer is studied. It turns out that a Bessel beam passing a standard magnetic objective lens is intrinsically spin polarized. In the limit of infinitely small detectors on axis, the spin polarisation tends to 100 % . Increasing the detector size, the polarisation decreases rapidly, dropping below 10-4 for standard settings of medium voltage microscopes. For extremely low voltages, the figure of merit increases by two orders of magnitude, approaching that of existing Mott detectors. Our findings may lead to new desings of spin filters, an attractive option in view of its inherent combination with the electron microscope, especially at low voltage.