{"677093":{"#nid":"677093","#data":{"type":"event","title":"CMP\/AMO Seminar: Topology and Correlations in Thin-Layered TaIrTe\u2084","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ESpeaker: \u003C\/strong\u003EProf. Qiong Ma\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EHost:\u003C\/strong\u003E Prof. Chunhui Du\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ETitle:\u003C\/strong\u003E Topology and Correlations in Thin-Layered TaIrTe\u2084\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E I will present experimental studies on the topological and correlated properties of monolayer TaIrTe\u2084. First, I will discuss a dual quantum spin Hall (QSH) insulator, arising from the interplay between its single-particle topology and density-tuned correlations. At charge neutrality, monolayer TaIrTe\u2084 exhibits QSH insulator behavior, characterized by enhanced nonlocal transport and quantized helical edge conductance. Upon introducing electrons from charge neutrality, TaIrTe4 only shows metallic behavior in a small range of charge densities but quickly goes into a new insulating state. This insulating state could arise from a strong electronic instability near the van Hove singularities, likely leading to a charge density wave.\u0026nbsp; Within this correlated insulating gap, we observe a resurgence of the QSH state. If time permits, I will also discuss our recent efforts to study this correlated gap using nonlinear Hall responses.\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EProf.\u0026nbsp;Ma\u0026nbsp;earned her Ph.D. at\u0026nbsp;the Massachusetts Institute of Technology.\u0026nbsp; Dr.\u0026nbsp;Ma\u0027s\u0026nbsp;area of\u0026nbsp;research\u0026nbsp;is condensed matter\u0026nbsp;experiment;\u0026nbsp;2D and moir\u00e9\u0026nbsp;heterostructures;\u0026nbsp;topological and correlated physics;\u0026nbsp;low-temperature electronic transport;\u0026nbsp;nonlinear, ultrafast, and near-field optoelectronic microscopies\u0026nbsp;and spectroscopies.\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"CMP\/AMO Seminar: Topology and Correlations in Thin-Layered TaIrTe\u2084"}],"uid":"36625","created_gmt":"2024-09-25 13:47:06","changed_gmt":"2024-09-30 14:00:22","author":"crichardson76","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2024-10-23T14:00:00-04:00","event_time_end":"2024-10-23T15:00:00-04:00","event_time_end_last":"2024-10-23T15:00:00-04:00","gmt_time_start":"2024-10-23 18:00:00","gmt_time_end":"2024-10-23 19:00:00","gmt_time_end_last":"2024-10-23 19:00:00","rrule":null,"timezone":"America\/New_York"},"location":"Howey Building - Room N110","extras":[],"hg_media":{"675097":{"id":"675097","type":"image","title":"Dr. Qiong Ma ","body":"\u003Cp\u003ETitle: Topology and Correlations in Thin-Layered TaIrTe\u2084\u003C\/p\u003E\u003Cp\u003EPresenter: Qiong Ma, Boston College\u003C\/p\u003E\u003Cp\u003EAbstract: I will present experimental studies on the topological and correlated properties of monolayer TaIrTe\u2084. First, I will discuss a dual quantum spin Hall (QSH) insulator, arising from the interplay between its single-particle topology and density-tuned correlations. At charge neutrality, monolayer TaIrTe\u2084 exhibits QSH insulator behavior, characterized by enhanced nonlocal transport and quantized helical edge conductance. Upon introducing electrons from charge neutrality, TaIrTe4 only shows metallic behavior in a small range of charge densities but quickly goes into a new insulating state. This insulating state could arise from a strong electronic instability near the van Hove singularities, likely leading to a charge density wave.\u0026nbsp; Within this correlated insulating gap, we observe a resurgence of the QSH state. If time permits, I will also discuss our recent efforts to study this correlated gap using nonlinear Hall responses.\u003C\/p\u003E","created":"1727272300","gmt_created":"2024-09-25 13:51:40","changed":"1727704721","gmt_changed":"2024-09-30 13:58:41","alt":"Prof. Qiong Ma","file":{"fid":"258690","name":"Qiong Ma Picture.jpg","image_path":"\/sites\/default\/files\/2024\/09\/25\/Qiong%20Ma%20Picture.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/2024\/09\/25\/Qiong%20Ma%20Picture.jpg","mime":"image\/jpeg","size":26972,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/2024\/09\/25\/Qiong%20Ma%20Picture.jpg?itok=iDHMOE2d"}}},"media_ids":["675097"],"groups":[{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[],"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"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}