{"582159":{"#nid":"582159","#data":{"type":"event","title":"Spin jams, tessellations and exotic entropy in a frustrated magnet","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ESchool of Physics Hard Condensed Matter Seminar: Prof. Israel Klich, University of Virginia\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWhen spins are regularly arranged in a triangular fashion, the spins may not satisfy simultaneously their antiferromagnetic interactions with their\u0026nbsp;\u003Cbr \/\u003E\r\nneighbors. This phenomenon, called frustration, may lead to a large set of ground states and to exotic states such as spin ice and spin liquid.\u0026nbsp;\u003Cbr \/\u003E\r\nHowever, when frustration is present simultaneously with disorder, a spin-glass is known to be a typical state of such a magnetic system. Is disorder necessary for a spin glass to form? This fundamental question has been frequently asked and several theoretical models of clean glassy states has been proposed, typically relying on long range interactions.\u0026nbsp;Motivated by puzzling behavior observed in a well studied magnetic systems (SCGO), I describe a novel mechanism wherein quantum fluctuations cause a clean system governed by simple local interactions to freeze into a glass. At the heart of the effect is an unusual scaling of the number of local minima, with a scaling extensive in the boundary length rather than the volume. I will explain how these properties follow by a combination of tools and mappings, leading to a problem of counting tessellations. I will also present recent experimental evidence for the spin jam scenario.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Spin jams, tessellations and exotic entropy in a frustrated magnet"}],"uid":"27664","created_gmt":"2016-10-05 18:29:54","changed_gmt":"2017-04-13 21:14:27","author":"Alison Morain","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-12T12:00:00-04:00","event_time_end":"2016-10-12T13:00:00-04:00","event_time_end_last":"2016-10-12T13:00:00-04:00","gmt_time_start":"2016-10-12 16:00:00","gmt_time_end":"2016-10-12 17:00:00","gmt_time_end_last":"2016-10-12 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[],"categories":[],"keywords":[{"id":"166937","name":"School of Physics"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003Eamorain@gatech.edu\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}