{"663149":{"#nid":"663149","#data":{"type":"event","title":"Can Chern insulators be polarized? ","body":[{"value":"\u003Ch3\u003ESchool of Physics, Condensed Matter Seminar| Dr. Wladimir Benalcazar | Emory University, Atlanta GA\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EChern insulators present an obstruction to the construction of exponentially-localized Wannier functions; i.e., they lack a so-called \u0026ldquo;Wannier representation.\u0026rdquo; In this talk, I will address one of the outstanding questions in topological band theory: whether polarization and its boundary charge, which are well-defined on crystalline insulators having a Wannier representation, are well-defined in Chern insulators. I will show how, by recognizing a subtlety in the bulk-boundary correspondence of multipole moments, it is possible to describe charge accumulation in Chern insulators as arising from a response to polarization.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"School of Physics, Condensed Matter Seminar| Dr. Wladimir Benalcazar | Emory University , Atlanta GA"}],"uid":"30957","created_gmt":"2022-11-14 17:32:07","changed_gmt":"2022-11-15 16:10:01","author":"Shaun Ashley","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-11-16T14:00:00-05:00","event_time_end":"2022-11-16T15:00:00-05:00","event_time_end_last":"2022-11-16T15:00:00-05:00","gmt_time_start":"2022-11-16 19:00:00","gmt_time_end":"2022-11-16 20:00:00","gmt_time_end_last":"2022-11-16 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"663147":{"id":"663147","type":"image","title":"Dr. Wladimir Benalcazar","body":null,"created":"1668446695","gmt_created":"2022-11-14 17:24:55","changed":"1668446695","gmt_changed":"2022-11-14 17:24:55","alt":"","file":{"fid":"251061","name":"Condensed Matter Seminar Nov 16 2022.png","image_path":"\/sites\/default\/files\/images\/Condensed%20Matter%20Seminar%20Nov%2016%202022.png","image_full_path":"http:\/\/www.tlwarc.hg.gatech.edu\/\/sites\/default\/files\/images\/Condensed%20Matter%20Seminar%20Nov%2016%202022.png","mime":"image\/png","size":456158,"path_740":"http:\/\/www.tlwarc.hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Condensed%20Matter%20Seminar%20Nov%2016%202022.png?itok=RzpcAkP_"}}},"media_ids":["663147"],"groups":[],"categories":[],"keywords":[{"id":"960","name":"physics"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003Ezebrocklin@gatech.edu\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}