Fig. 1: (a) Schematic drawing of the iSPEM machine. Spin-polarized electronic state images in real (a) and momentum (b) spaces [3].58We have developed an imaging-type spin-resolved photoemission microscopy (iSPEM) machine equipped with a multi-channel spin detector developed at the National Institute for Materials Science (NIMS) [1-3]. Thanks to the multi-channel spin detector, the iSPEM machine quickly visualizes the spin-polarized electronic states of materials. Besides, spin-resolved photoemission spectroscopy in real space achieves a spatial resolution of 400 nm. We demonstrate the spin polarization imaging of polycrystalline iron with the real space mode and spin-resolved Fermi-surface imaging of Bi(111) in the momentum space mode. Angle resolved photoemission spectroscopy (ARPES) directly reveals electronic structure of a material. To apply ARPES, the sample surface must be atomically flat. In the case of bulk samples, the sample surface is prepared by cleaving in-situ, or optical polish in air and sputtering and annealing in ultrahigh vacuum. Therefore, the actual target of ARPES is limited. If ARPES could be applied to polycrystalline samples, ARPES would become a more useful technique. To overcome this problem, we are working on the development of a new analysis method. We have obtained ARPES data from an area of approximately 10 mm×2 mm area for various locations in polycrystalline silver using imaging-type photoemission microscopy [1-3]. Different spectra reflecting different crystal orientations is obtained for different locations. In this presentation, we will report on the current status of our method. P2-03Visualization of Spin-polarized Electronic States by Imaging-type Spin-resolved Photoemission microscopyKoichiro Yaji1,2 and Shunsuke Tsuda1 1 Center for Basic Research on Materials, National Institute for Materials Science (NIMS)2 Unprecedented-scale Data Analytics Center, Tohoku University[1] K. Yaji, S. Tsuda, e-JSSNT, 22, 46 (2024). [2] S. Tsuda, K. Yaji, e-JSSNT, 22, 170 (2024). [3] K. Yaji, S. Tsuda, STAM-M, 4, 2328206 (2024).P2-04Angle-resolved Photoemission Spectroscopy of Polycrystalline Materials Using an Imaging-type Photoemission Microscope Shunsuke Tsuda1, Yohei Yamaji2, and Koichiro Yaji1,3 1 Research Center for Basic Research on Materials, National Institute for Materials Science (NIMS) 2 Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS) 3 UDAC, Tohoku University [1] K. Yaji and S. Tsuda, e-J. Surf. Sci. Nanotechnol., 22, 46 (2024). [2] K. Yaji and S. Tsuda, STAM method, 4, 2328206 (2024). [3] S. Tsuda and K. Yaji, e-J. Surf. Sci. Nanotechnol., 22, 170 (2024).
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