{"614043":{"#nid":"614043","#data":{"type":"event","title":"School of Physics - Condensed Matter Seminar - Dr. Dmitry Smirnov","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EProbing Excitons in Transition Metal Dichalcogenides Monolayers with High Magnetic Fields\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EDmitry Smirnov\u003C\/strong\u003E,\u0026nbsp;Research Faculty III\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003ENational High Magnetic Field Laboratory\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EStrong Coulomb interactions in single-layer transition\u0026nbsp;metal dichalcogenides (TMDs) result in the emergence of strongly bound excitons.\u0026nbsp;These excitons and excitonic complexes,\u0026nbsp;trions or biexcitons, for example, possess the\u0026nbsp;valley degree of freedom and can be either optically bright or dark, depending\u0026nbsp;on the spin configuration of\u0026nbsp;the conduction and valence bands. In this talk, I\u0026nbsp;will review our recent efforts on probing and controlling excitons in monolayer\u0026nbsp;MoSe2\u0026nbsp;and WSe2\u0026nbsp;TMDs with high magnetic\u0026nbsp;fields.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EBy employing\u0026nbsp;high-field optical magneto-spectroscopy under strong out-of-plane magnetic\u0026nbsp;fields and as a function of doping level, we can identify different exciton\u0026nbsp;species and deduce their valley origins and binding energies. When a strong magnetic\u0026nbsp;field is applied parallel to the 2D plane, it can be used to tilt and mix the CB\u0026nbsp;spin\u0026nbsp;component of excitons, which allows us to brighten and probe directly otherwise\u0026nbsp;optically dark excitons. All of these effects vary with an applied gate voltage. It appears that proximity to graphene induces a charge transfer to RuCl3 that is sensitive to and perhaps controllable by an external voltage.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Join the School of Physics as they present their Condensed Matter Seminar featuring guest speaker Dr. Dmitry Smirnov. "}],"uid":"32022","created_gmt":"2018-11-08 20:13:33","changed_gmt":"2018-11-08 21:16:08","author":"Farlenthia Walker","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-11-15T15:00:00-05:00","event_time_end":"2018-11-15T16:00:00-05:00","event_time_end_last":"2018-11-15T16:00:00-05:00","gmt_time_start":"2018-11-15 20:00:00","gmt_time_end":"2018-11-15 21:00:00","gmt_time_end_last":"2018-11-15 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"614037":{"id":"614037","type":"image","title":"Dmitry Smirnov","body":null,"created":"1541706018","gmt_created":"2018-11-08 19:40:18","changed":"1541706018","gmt_changed":"2018-11-08 19:40:18","alt":"","file":{"fid":"233764","name":"Dmitry Smirnov.jpg","image_path":"\/sites\/default\/files\/images\/Dmitry%20Smirnov.jpg","image_full_path":"http:\/\/www.tlwarc.hg.gatech.edu\/\/sites\/default\/files\/images\/Dmitry%20Smirnov.jpg","mime":"image\/jpeg","size":5842,"path_740":"http:\/\/www.tlwarc.hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Dmitry%20Smirnov.jpg?itok=-30jyZxD"}}},"media_ids":["614037"],"groups":[{"id":"217141","name":"Georgia Tech Materials Institute"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"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":""}}}