Presentation Information
[3B04]Development of spin-resolved photoemission microscopy at NIMS
*Koichiro Yaji1 (1. National Institute for Materials Science)
We have developed an advanced imaging-type spin-resolved photoemission microscope (iSPEM) that incorporates a multi-channel spin detector and a 10.9 eV laser. Our iSPEM machine greatly enhances the efficiency of spin- and angle-resolved photoemission spectroscopy (SARPES), achieving data acquisition speeds about 10,000 times faster than conventional instruments that rely on single-channel spin detectors. Based on the imaging concept, our iSPEM allows simultaneous multi-channel detection, drastically reducing measurement time. In real-space mode, it achieves spatial resolutions of 400 nm for spin-resolved imaging and 30 nm for spin-integrated imaging. The capabilities have been demonstrated through spin polarization imaging of polycrystalline Fe and spin-resolved Fermi surface mapping of Bi(111) in momentum space mode. This technology enables detailed investigations of the electronic states of microscopic materials, such as polycrystalline, powdered, and combinatorial samples, which were previously beyond the reach of conventional spin-resolved photoemission techniques.