{ "129593-21863823": { "datetime_modified":"20250127T093017", "datetime_start":"20250204T160000", "datetime_end":"20250204T170000", "has_end_time":1, "date_start":"2025-02-04", "date_end":"2025-02-04", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"CM-AMO Seminar | Scanning time-resolved optical studies on Kagome superconductors", "occurrence_title":"", "combined_title":"CM-AMO Seminar | Scanning time-resolved optical studies on Kagome superconductors: Liang Wu (University of Pennsylvania)", "event_subtitle":"Liang Wu (University of Pennsylvania)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"The kagome lattice provides a fascinating playground to study geometrical frustration, topology and strong correlations. The newly discovered kagome metals AV_3Sb_5 (A = K, Rb, Cs) exhibit exotic phases including charge density waves (CDWs) and superconductivity. In our study, we perform scanning birefringence and circular dichroism (CD) microscopy on CsV_3Sb_5. The scanning birefrigence demonsate six-fold rotational symmetry breaking in the CDW phase and three domains that are 120 degree to each other. The emergence of opposite CD domains within the same birefringence domain, along with field-induced CD switching, indicate broken time-reversal symmetry. Furthermore, ultrafast pump-probe reflectivity measurements reveal a splitting of charge density wave induced phonon modes in all three birefringence domains. Such a breaking in degeneracy corroborates the six-fold rotation symmetry breaking in the charge ordered phase. I will also discuss the CDW fluctuations from the pump-probe measurement.\r\n\r\nReferences\r\n\r\n[1] Y. Xu, Z. Ni, Y. Liu, B. Ortiz, Q. Deng, S. Wilson, B. Yan, L. Balents, and Liang Wu* \"Three-state nematicity and magneto-optical Kerr effect in the charge density waves in kagome superconductors.\" Nature Physics 18, 1470-1475 (2022)\r\n\r\n[2] Q. Deng, H. Tan, B. R. Ortiz, S. D. Wilson, B. Yan, and Liang Wu* \u201eRevealing Rotational Symmetry Breaking Charge-density Wave Order in Kagome Superconductor by Ultrafast Pump-probe Experiments\u201c Under review\r\n\r\n[3] Q. Deng et al. In preparation", "occurrence_notes":null, "guid":"129593-21863823@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/129593", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science"], "website":"", "sponsors":[ { "group_name":"CM-AMO Seminars", "group_id":"3801", "website":"" }, { "group_name":"Department of Physics", "group_id":"1965", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21863823 } , "131291-21868111": { "datetime_modified":"20250121T100030", "datetime_start":"20250204T160000", "datetime_end":"20250204T170000", "has_end_time":1, "date_start":"2025-02-04", "date_end":"2025-02-04", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"German Convo on the Go", "occurrence_title":"", "combined_title":"German Convo on the Go", "event_subtitle":"", "event_type":"Social \/ Informal Gathering", "event_type_id":"19", "description":"Members of the U-M community can walk and talk in German with Mary Gell (magell@umich.edu), German language instructor. 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We've proudly helped over 7,500 schools profit more than $600 million in much-needed funds. Our mission is to raise $1 billion for schools by 2027, and we're excited about every step we take toward this goal.\u00a0\u00a0WHAT TO EXPECT: During this information session, you will hear more about what Booster does as a company and you'll get the chance to make a personal connection with each of Booster's recruiters! We'll explore what Booster's company culture looks like and what career growth opportunities there are within the company. We hope to see you there!\u00a0\u00a0- Check out our Career Page to learn more: https:\/\/www.choosebooster.com\/careers", "occurrence_notes":null, "guid":"131851-21869318@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/131851", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"", "has_livestream":0, "cost":"", "tags":[], "website":"", "sponsors":[ { "group_name":"University Career Center UCC", "group_id":"1140", "website":"http:\/\/careercenter.umich.edu" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21869318 } , "125067-21854317": { "datetime_modified":"20250116T113633", "datetime_start":"20250204T160000", "datetime_end":"", "has_end_time":0, "date_start":"2025-02-04", "date_end":"", "time_start":"16:00:00", "time_end":"", "time_zone":"America\/Detroit", "event_title":"Probing Electrochemical Reactivity Under Nanoconfinement in Layered Electrode Materials", "occurrence_title":"", "combined_title":"Probing Electrochemical Reactivity Under Nanoconfinement in Layered Electrode Materials: Veronica Augustyn (NC State)", "event_subtitle":"Veronica Augustyn (NC State)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Electrochemical processes are vital for global decarbonization efforts because they are central to many energy-efficient storage and conversion technologies and can also be leveraged for large scale chemical manufacturing. In the context of these energy applications, it is necessary to understand factors that control the kinetics and selectivity of electrochemical reactions. At the electrode level, many factors, including the chemical composition, atomic or molecular structure, surface area, and morphology, have been leveraged to direct electrochemical reactions. An emerging strategy is to geometrically confine the electrochemical reaction within a porous electrode material. This places a physical boundary around the electrochemical reaction and thus defines the reaction microenvironment, while also spatially restricting the reactants and products. Experimental studies of nanoconfinement effects on electrochemical reactions require electrochemical interfaces with well-defined environments. In this presentation, I will discuss our materials chemistry approach to define the confined electrochemical environment within molecularly pillared transition metal oxides, and our study of electrochemical reactions taking place within these electrodes using in situ and operando electrochemical methods.", "occurrence_notes":null, "guid":"125067-21854317@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/125067", "building_id":"1000158", "building_name":"Chemistry Dow Lab", "campus_maps_id":"34", "room":"1640", "location_name":"Chemistry Dow Lab", "has_livestream":0, "cost":"", "tags":["Chemistry","Inorganic Chemistry"], "website":"https:\/\/mse.ncsu.edu\/people\/vaugust\/", "sponsors":[ { "group_name":"Department of Chemistry", "group_id":"3761", "website":"https:\/\/lsa.umich.edu\/chem" }, { "group_name":"Inorganic Chemistry", "group_id":"4387", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21854317 } , "131899-21869372": { "datetime_modified":"20250127T090445", "datetime_start":"20250204T160000", "datetime_end":"20250204T170000", "has_end_time":1, "date_start":"2025-02-04", "date_end":"2025-02-04", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Psycholinguistics", "occurrence_title":"", "combined_title":"Psycholinguistics: Discussion Group", "event_subtitle":"Discussion Group", "event_type":"Meeting", "event_type_id":"14", "description":"The psycholinguistics discussion group is a meeting of several lab groups from Linguistics, Psychology, and other departments that all share common interests in language processing, including comprehension, production, and acquisition. 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