{"id":12705,"date":"2025-07-21T17:07:15","date_gmt":"2025-07-21T09:07:15","guid":{"rendered":"https:\/\/www2.phy.ntnu.edu.tw\/?p=12705"},"modified":"2025-11-20T17:48:25","modified_gmt":"2025-11-20T09:48:25","slug":"114-1-seminar-1141203","status":"publish","type":"post","link":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/2025\/07\/21\/114-1-seminar-1141203\/","title":{"rendered":"114-1 SEMINAR \u838a\u5b50\u5f18(\u540c\u6b65\u8f3b\u5c04)-1141203"},"content":{"rendered":"\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Time\uff1a1141203 (Wed.) 14:20~16:20 <br>Speaker\uff1aProf.<strong>\u838a\u5b50\u5f18\/ Chuang, Tzu-Hung<\/strong> <br><strong>\u570b\u5bb6\u540c\u6b65\u8f3b\u5c04\u7814\u7a76\u4e2d\u5fc3\u5948\u7c73\u79d1\u5b78\u5c0f\u7d44\/Nano Science Group, National Synchrotron Radiation Research Center<\/strong> <br>Title\uff1a<strong>Soft X-ray photoelectron spectro-microscopy at the Taiwan Photon Source<\/strong> <br>Abstract\uff1a<br>An imaging-type photoelectron momentum microscope (MM) recently established at the Taiwan Photon Source (TPS) 27A2 [1-2] is an ideal tool for probing advanced two-dimensional (2D) van der Waals (vdW) materials, taking advantages of the combination of direct-space and momentum-space imaging and photoelectron spectroscopy capabilities with both element- and spin-resolution. <br>Offline commissioning of the MM was performed using two in-house ultraviolet (UV) sources [2], and the commissioning with synchrotron soft X-rays has been initiated in mid- 2025. In this talk, the performance of the MM by measuring a standard checkerboard-patterned specimen and an Au(111) single crystal using UV sources will be first presented. By analyzing the intensity profile of the edge of the Au patterns, the Rashba-splitting of Au(111) Shockley surface state at 300 K, and the photoelectron intensity across the Fermi-edge at 80 K, the spatial, momentum, and energy resolution were estimated to be 50 nm, 0.0172\u00a0 \u00c5-1\u00a0 and 26 meV, respectively [2]. <br>Finally, synchrotron soft X-rays have been arrived at the 27A2 end-station in mid-2025. Recent commissioning results on imaging-based X-ray photoelectron spectroscopy (XPS), X- ray absorption spectroscopy (XAS), and X-ray magnetic circular dichroism (XMCD) measured on a 2D vdW material and a ferromagnetic thin film, respectively, will be demonstrated. <br>References: <br>[1] Shiu, et. al., \u201cWhen microscopy meets soft X-ray at TLS and TPS\u201d, J. Electron Spectrosc. Relat. Phenom. 266, 147363 (2023). <br>[2] Chuang, et al., \u201cPerformance of a photoelectron momentum microscope in direct- and momentum-space imaging with ultraviolet photon source\u201d, J. Synchrotron Rad. 31, 195 (2024). <br>Place\uff1aS101, Gongguan Campus, NTNU<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Time\uff1a1141203 (Wed.) 14:20~16:20 Speaker\uff1aProf.\u838a\u5b50\u5f18\/ Chuan [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[1,19],"tags":[],"class_list":["post-12705","post","type-post","status-publish","format-standard","hentry","category-news","category-19","entry"],"_links":{"self":[{"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/posts\/12705","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/comments?post=12705"}],"version-history":[{"count":3,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/posts\/12705\/revisions"}],"predecessor-version":[{"id":13169,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/posts\/12705\/revisions\/13169"}],"wp:attachment":[{"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/media?parent=12705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/categories?post=12705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/tags?post=12705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}