{"id":10557,"date":"2024-01-05T09:46:07","date_gmt":"2024-01-05T01:46:07","guid":{"rendered":"https:\/\/www2.phy.ntnu.edu.tw\/?p=10557"},"modified":"2024-02-20T14:14:42","modified_gmt":"2024-02-20T06:14:42","slug":"112-2-seminar-1130327","status":"publish","type":"post","link":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/2024\/01\/05\/112-2-seminar-1130327\/","title":{"rendered":"112-2 SEMINAR \u67f3\u6fa4\u9054\u4e5f(\u5317\u6d77\u9053\u5927\u5b78\u7269\u7406)-1130327"},"content":{"rendered":"\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Time\uff1a1130327 (Wed.) 14:20~16:20 <br>Speaker\uff1aProf.<strong>\u67f3\u6fa4\u9054\u4e5f(Tatsuya YANAGISAWA)<\/strong> <strong>\u5317\u6d77\u9053\u5927\u5b78\u7269\u7406\u5b78\u7cfb\/Department of Physics, Hokkaido University, Japan<\/strong> <br>Title\uff1a<strong>Observation of Multipoles in the Solid State using Ultrasound<\/strong> <br>Abstract\uff1aUltrasonic measurement is one of the unique and powerful techniques to probe anisotropic local charge distributions and fluctuations in solids [1] associated with the electric\/magnetic-multipolar moments of d- or f-orbital, valence\/charge fluctuations, atomic vacancy in Si and diamond, and atomic oscillation so called \u2018rattling\u2019. These are difficult to be detected by a typical technique such as electrical resistivity and magnetization. In general, the principle of the ultrasonic measurement in solids is based on motoring local strains of the lattice induced by a propagating elastic wave, which is coupled to the local charge distribution and interaction between charge and lattice vibration. As a result, the longitudinal and transverse acoustic waves can observe the multipolar responses of different symmetries \u201cspectroscopically\u201d (Fig. 1). Since the above-mentioned electric degrees of freedom cause a spontaneous symmetry breaking and induce lattice instabilities in some compounds of the strongly correlated electron systems, therefore, it is very important to get the information regarding physical acoustics when exploring a new material. I would like to briefly introduce the recent progress of the ultrasonic studies on strongly correlated electron systems [2-4], and the story of our discovery of elastic softening in the synthetic diamond [5]. <br>[1] B. L\u00fcthi, Physical Acoustics in the Solid State (Springer, Berlin, 2006). <br>[2] T. Yanagisawa et al., Phys. Rev. Lett. 123, 067201 (2019). <br>[3] T. Yanagisawa et al., Phys. Rev. Lett. 126, 157201 (2021). <br>[4] R. Hibino et al., J. Phys. Soc. Jpn. 92, 074708 (2023). <br>[5] T. Yanagisawa et al., arXiv:2401.03377. <br>Place\uff1aB101, Gongguan Campus, NTNU<br><a href=\"https:\/\/www2.phy.ntnu.edu.tw\/wp-content\/uploads\/2024\/01\/1130327_Abstract-1.pdf\">https:\/\/www2.phy.ntnu.edu.tw\/wp-content\/uploads\/2024\/01\/1130327_Abstract-1.pdf<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Time\uff1a1130327 (Wed.) 14:20~16:20 Speaker\uff1aProf.\u67f3\u6fa4\u9054\u4e5f(Tatsu [&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":"off","ocean_gallery_id":[],"footnotes":""},"categories":[1,19],"tags":[],"class_list":["post-10557","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\/10557","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=10557"}],"version-history":[{"count":13,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/posts\/10557\/revisions"}],"predecessor-version":[{"id":10768,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/posts\/10557\/revisions\/10768"}],"wp:attachment":[{"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/media?parent=10557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/categories?post=10557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www2.phy.ntnu.edu.tw\/index.php\/wp-json\/wp\/v2\/tags?post=10557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}