{"id":11757,"date":"2025-10-18T10:21:10","date_gmt":"2025-10-18T08:21:10","guid":{"rendered":"https:\/\/fermi.univ-tlse3.fr\/?post_type=tribe_events&#038;p=11757"},"modified":"2025-11-06T10:23:02","modified_gmt":"2025-11-06T09:23:02","slug":"towards-control-of-quantum-materials-using-intense-laser-pulses-nicolas-tancogne-dejean-fermi-seminaire-25-11-2025-11h","status":"publish","type":"tribe_events","link":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/towards-control-of-quantum-materials-using-intense-laser-pulses-nicolas-tancogne-dejean-fermi-seminaire-25-11-2025-11h\/","title":{"rendered":"Towards control of quantum materials using intense laser pulses. &#8211; (Nicolas TANCOGNE-DEJEAN \/ FeRMI \/ S\u00e9minaire). &#8211; 25\/11\/2025, 11H"},"content":{"rendered":"<p><strong><span style=\"font-size: 20px; background-color: #f18500;\">S\u00e9minaire FeRMI<\/span><\/strong><\/p>\n<p><strong>Nicolas TANCOGNE-DEJEAN, <\/strong> <span class=\"\">Research Center Futur Energy Materials and Systems of the University Alliance Ruhr and Interdisciplinary Centre for Advanced Materials Simulations (Ruhr University Bochum, Allemagne)<\/span><\/p>\n<p><span style=\"color: #191970; font-size: 20px;\"><strong>Summary :<\/strong><\/span><br \/>\nAll-optical spectroscopy of matter is a well established technique to access properties of electrons and quasi-particles in matter, and the description of optical properties of material is well understood in the limit of weak laser fields. Recent advances in experimental techniques have opened up the possibility to develop novel types of spectroscopies based ultrashort and intense laser pulses.<br \/>\nUsing these new probes allows for instance to access non-equilibrium dynamics of condensed-matter systems, coherently control magnetization on ultrafast timescales, or to allow for exploring non-equilibrium phase diagram of correlated materials.<br \/>\nThe strong-field electronic dynamics in solids have received a lot of attention, in particular due to the experimental observation of high-harmonic generation in solids. The dynamics associated with strong laser fields requires a non-perturbative description of the electronic dynamics. In this talk, I will present how a successful way for describing this strong-field dynamics in quantum materials, using ab initio methods based on real-time time-dependent density functional theory, complemented by an ab initio Hubbard U <strong>[1]<\/strong>.<br \/>\nI will present some examples of how these intense lasers can be used to coherently control materials&rsquo; properties, in particular correlated materials electronic structure <strong>[2]<\/strong>, magnetic <strong>[3]<\/strong>, and optical properties on ultrafast timescales <strong>[4,5]<\/strong>, especially focusing on recent experimental validations of the earlier theoretical predictions.<\/p>\n<p><strong>[1] .<\/strong> N. Tancogne-Dejean, et al., Phys. Rev. Lett. 118, 087403 (2017)<br \/>\n<strong>[2] .<\/strong> S. Beaulieu, et al., Science Advances 7, abd9275 (2021)<br \/>\n<strong>[3] .<\/strong> G. Topp, N. Tancogne-Dejean et al., Nat. Commun. 9, 4452 (2018)<br \/>\n<strong>[4] .<\/strong> T. Rossi, N. Tancogne-Dejean, et al., Science Advances 11, adx5676 (2024)<br \/>\n<strong>[5] .<\/strong> R. Cazali et al., arXiv:2501.19238 (2025)<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<div class=\"leaflet-map WPLeafletMap\" style=\"height:300px; width:70%;\"><\/div><script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMapShortcode() {\/*<script>*\/\nvar baseUrl = atob('aHR0cHM6Ly97c30udGlsZS5vcGVuc3RyZWV0bWFwLm9yZy97en0ve3h9L3t5fS5wbmc=');\nvar base = (!baseUrl && window.MQ) ?\n    window.MQ.mapLayer() : L.tileLayer(baseUrl,\n        L.Util.extend({}, {\n            detectRetina: 0,\n        },\n        {\"subdomains\":\"abc\",\"noWrap\":false,\"maxZoom\":18}        )\n    );\n    var options = L.Util.extend({}, {\n        layers: [base],\n        attributionControl: false\n    },\n    {\"zoomControl\":true,\"scrollWheelZoom\":true,\"doubleClickZoom\":true,\"fitBounds\":true,\"minZoom\":9,\"maxZoom\":18,\"maxBounds\":null,\"attribution\":\"<a href=\\\"http:\\\/\\\/leafletjs.com\\\" title=\\\"Une biblioth\\u00e8que JS pour des cartes interactives\\\">Leaflet<\\\/a>; \\u00a9 <a href=\\\"http:\\\/\\\/www.openstreetmap.org\\\/copyright\\\">OpenStreetMap<\\\/a> contributeurs\"},\n    {});\nwindow.WPLeafletMapPlugin.createMap(options).setView([43.560830727361,1.4672373725804],16);window.WPLeafletMapPlugin.createScale({});});<\/script>\n<script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMarkerShortcode() {\/*<script>*\/\nvar map = window.WPLeafletMapPlugin.getCurrentMap();\nvar group = window.WPLeafletMapPlugin.getCurrentGroup();\nvar marker_options = window.WPLeafletMapPlugin.getIconOptions({});\nvar marker = L.marker(\n    [0,0],\n    marker_options\n);\nvar is_image = map.is_image_map;\n    marker.setLatLng( map.getCenter() );\nif (marker_options.draggable) {\n    marker.on('dragend', function () {\n        var latlng = this.getLatLng();\n        var lat = latlng.lat;\n        var lng = latlng.lng;\n        if (is_image) {\n            console.log('leaflet-marker y=' + lat + ' x=' + lng);\n        } else {\n            console.log('leaflet-marker lat=' + lat + ' lng=' + lng);\n        }\n    });\n}\nmarker.addTo( group );\nmarker.bindPopup(window.WPLeafletMapPlugin.unescape('Salle de conf\u00e9rence (- B\u00e2timent 3R4)'));window.WPLeafletMapPlugin.markers.push( marker );\n        });<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Lieu : Salle de conf\u00e9rence, 3R4<\/p>\n","protected":false},"author":5,"featured_media":0,"template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[48,307,233],"class_list":["post-11757","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-events","tribe_events_cat-fermisem","tribe_events_cat-seminars","cat_events","cat_fermisem","cat_seminars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - 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