{"id":61191,"date":"2023-12-05T10:31:37","date_gmt":"2023-12-05T08:31:37","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=61191"},"modified":"2024-01-11T12:51:19","modified_gmt":"2024-01-11T10:51:19","slug":"un-materiau-bidimensionnel-a-grande-echelle-pour-des-applications-neuromorphiques","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/un-materiau-bidimensionnel-a-grande-echelle-pour-des-applications-neuromorphiques.html","title":{"rendered":"Un mat\u00e9riau bidimensionnel \u00e0 grande \u00e9chelle pour des applications neuromorphiques"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-p6o77r-7bd154b309bd749cbb57f5c600a2b602\">\n.flex_column.av-p6o77r-7bd154b309bd749cbb57f5c600a2b602{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-p6o77r-7bd154b309bd749cbb57f5c600a2b602 av_one_full  avia-builder-el-0  el_before_av_hr  avia-builder-el-first  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-lps37bux-f03c8f1be205157f60a780272dda9a9a'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h1 style=\"text-align: center;\"><\/h1>\n<h1 style=\"text-align: center;\"><b><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel3-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-61233 size-full aligncenter\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel3-1.jpg\" alt=\"\" width=\"800\" height=\"75\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel3-1.jpg 800w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel3-1-300x28.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel3-1-768x72.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel3-1-18x2.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel3-1-705x66.jpg 705w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><\/b><b> Un mat\u00e9riau bidimensionnel \u00e0 grande \u00e9chelle<br \/>\npour des applications neuromorphiques<\/b><\/h1>\n<h1 style=\"text-align: center;\"><\/h1>\n<\/div><\/section><\/div>\n<div  class='hr av-lps4coye-15e16a2c112b56ec7e309787651112a8 hr-default  avia-builder-el-2  el_after_av_one_full  el_before_av_textblock'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-lps3ct08-6a2ca5ecc4eaa06a740dabcdee350aad'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><blockquote>\n<p><strong><span style=\"color: #993300;\">Les mat\u00e9riaux de Mott sont des mat\u00e9riaux quantiques dont les propri\u00e9t\u00e9s de commutation r\u00e9sistive sont analogues \u00e0 la r\u00e9ponse \u00e9lectrique des neurones biologiques. Un mat\u00e9riau de Mott bidimensionnel TaSe2, d\u00e9couvert r\u00e9cemment dans sa forme monocouche, a pu \u00eatre fabriqu\u00e9 \u00e0 l\u2019IEMN par \u00e9pitaxie sur un substrat industriel de phosphure de gallium (GaP). La continuit\u00e9 \u00e9lectrique du monofeuillet est attest\u00e9e \u00e0 l\u2019\u00e9chelle macroscopique, et la propri\u00e9t\u00e9 de commutation r\u00e9sistive a \u00e9t\u00e9 d\u00e9tect\u00e9e \u00e0 l\u2019\u00e9chelle nanom\u00e9trique. Ce r\u00e9sultat ouvre des perspectives prometteuses en termes d\u2019\u00e9lectronique \u00e0 faible impact \u00e9cologique et grande efficacit\u00e9 \u00e9nerg\u00e9tique.<\/span><\/strong><\/p>\n<\/blockquote>\n<p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-61195 size-full aligncenter\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel.jpg\" alt=\"\" width=\"800\" height=\"241\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel.jpg 800w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel-300x90.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel-768x231.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel-18x5.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/materiau_bidimensionnel-705x212.jpg 705w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-135tmjr-d659c804c48744acbee5fd7d5972710f\">\n.flex_column.av-135tmjr-d659c804c48744acbee5fd7d5972710f{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-135tmjr-d659c804c48744acbee5fd7d5972710f av_one_half  avia-builder-el-4  el_after_av_textblock  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-lps3un2v-5f018424476dc271da813aabb37e500e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: left;\"><strong>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-wzsvks-517bfaf9893ade785ca8d3206b5187d8\">\n.av_font_icon.av-wzsvks-517bfaf9893ade785ca8d3206b5187d8{\ncolor:#993300;\nborder-color:#993300;\n}\n.av_font_icon.av-wzsvks-517bfaf9893ade785ca8d3206b5187d8 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-wzsvks-517bfaf9893ade785ca8d3206b5187d8 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span> The <\/strong><strong>mat\u00e9riaux quantiques<\/strong> repr\u00e9sentent une vaste classe de mat\u00e9riaux dans lesquels les fortes interactions entre \u00e9lectrons donnent lieu \u00e0 des effets \u00e9lectroniques quantiques collectifs\u00a0comme la supraconductivit\u00e9, le magn\u00e9tisme ou la commutation r\u00e9sistive.<br \/>\nPour augmenter les interactions \u00e9lectroniques, on peut typiquement utiliser des mat\u00e9riaux o\u00f9 les atomes ont un grand nombre d\u2019\u00e9lectrons de valence (m\u00e9taux de transition), ou limiter la dimensionnalit\u00e9 du cristal pour confiner les \u00e9lectrons (mat\u00e9riaux 2D, 1D, points quantiques).<br \/>\nLes propri\u00e9t\u00e9s des mat\u00e9riaux quantiques sont \u00e0 fort potentiel pour le d\u00e9veloppement de composants \u00e9lectroniques innovants. Notamment, la commutation r\u00e9sistive induite par impulsion \u00e9lectrique dans des mat\u00e9riaux appel\u00e9s mat\u00e9riaux de Mott peut mimer certaines fonctions neuromorphiques : le changement d\u2019\u00e9tat de r\u00e9sistance obtenu suite \u00e0 une s\u00e9rie d\u2019impulsions \u00e9lectriques est analogue \u00e0 la r\u00e9ponse d\u2019un neurone biologique <em>[1] <\/em>.<\/p>\n<p><strong>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-wzsvks-517bfaf9893ade785ca8d3206b5187d8\">\n.av_font_icon.av-wzsvks-517bfaf9893ade785ca8d3206b5187d8{\ncolor:#993300;\nborder-color:#993300;\n}\n.av_font_icon.av-wzsvks-517bfaf9893ade785ca8d3206b5187d8 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-wzsvks-517bfaf9893ade785ca8d3206b5187d8 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span>L\u2019un des enjeux actuels majeurs est d\u2019int\u00e9grer ces mat\u00e9riaux \u00e0 l\u2019industrie micro\u00e9lectronique<\/strong> existante, \u00e0 grande \u00e9chelle, et\u00a0bas\u00e9e sur des technologies sp\u00e9cifiques aux substrats silicium et semiconducteurs III-V tels que le GaAs ou le GaP. L\u2019enjeu r\u00e9side \u00e0 la fois dans la fabrication et dans la ma\u00eetrise des propri\u00e9t\u00e9s \u00e9lectroniques de ces mat\u00e9riaux \u00e0 grande \u00e9chelle.<br \/>\nA l\u2019IEMN, un b\u00e2ti d\u00e9di\u00e9 \u00e0 la synth\u00e8se de mat\u00e9riaux chalcog\u00e9nures par \u00e9pitaxie par jet mol\u00e9culaire, install\u00e9 en 2020, a permis de fabriquer des couches d\u2019un mat\u00e9riau de Mott bidimensionnel d\u00e9couvert en 2021, 1T-TaSe2. Jusqu\u2019ici, ce mat\u00e9riau bidimensionnel, difficile \u00e0 fabriquer sous forme cristalline, avait \u00e9t\u00e9 obtenu uniquement sur substrat m\u00e9tallique. Ces substrats r\u00e9duisent consid\u00e9rablement les possibilit\u00e9s d\u2019applications puisqu\u2019ils court-circuitent le mat\u00e9riau actif. Dans ce contexte,<strong> le groupe EPIPHY a r\u00e9ussi \u00e0 fabriquer des monocouches de TaSe2 sur un substrat semiconducteur III-V, le phosphure de gallium.\u00a0 Ces couches ont fait l\u2019objet d\u2019une caract\u00e9risation multi\u00e9chelle par le groupe PHYSIQUE.<\/strong><\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-p8zsh3-6f007c292b31cefb8678f038cdc94986\">\n.flex_column.av-p8zsh3-6f007c292b31cefb8678f038cdc94986{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-p8zsh3-6f007c292b31cefb8678f038cdc94986 av_one_half  avia-builder-el-8  el_after_av_one_half  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-lps3un2v-5f018424476dc271da813aabb37e500e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-wzsvks-517bfaf9893ade785ca8d3206b5187d8\">\n.av_font_icon.av-wzsvks-517bfaf9893ade785ca8d3206b5187d8{\ncolor:#993300;\nborder-color:#993300;\n}\n.av_font_icon.av-wzsvks-517bfaf9893ade785ca8d3206b5187d8 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-wzsvks-517bfaf9893ade785ca8d3206b5187d8 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/strong>La qualit\u00e9 cristalline est attest\u00e9e notamment par des mesures par microscopie tunnel. La structure cristalline attendue a \u00e9t\u00e9 observ\u00e9e, tout comme la modulation \u00e9lectronique de type onde de densit\u00e9 de charge caract\u00e9ristique de ce compos\u00e9. De plus, un effet de Moir\u00e9 entre le TaSe2 et le substrat de GaP est mis en \u00e9vidence, qui atteste que la couche est bien une couche unique du mat\u00e9riau compos\u00e9 d\u2019un atome Ta entre deux atomes Se.<br \/>\nLa phase de Mott est \u00e0 l\u2019origine d\u2019une bande interdite d\u2019une centaine de milli\u00e9lectronvolts, qui a \u00e9t\u00e9 d\u00e9tect\u00e9e \u00e0 la fois \u00e0 l\u2019\u00e9chelle nanom\u00e9trique par spectroscopie tunnel, et par mesure de transport cryog\u00e9nique. Cette \u00e9tude b\u00e9n\u00e9ficie de l\u2019acquisition en 2022 \u00e0 l\u2019IEMN d\u2019un dispositif cryog\u00e9nique permettant une caract\u00e9risation rapide des propri\u00e9t\u00e9s de transport \u00e9lectriques.<br \/>\nDe fa\u00e7on g\u00e9n\u00e9rale, il est actuellement difficile d\u2019obtenir des couches atomiques cristallines \u00e9tendues, pourtant n\u00e9cessaires \u00e0 leur industrialisation. <strong>Les monocouches de 1T-TaSe2 pr\u00e9sentent des propri\u00e9t\u00e9s \u00e9lectriques homog\u00e8nes sur plusieurs millim\u00e8tres. Enfin, nous avons observ\u00e9 une premi\u00e8re signature d\u2019un effet de commutation r\u00e9sistive sous l\u2019effet du champ \u00e9lectrique, \u00e0 l\u2019\u00e9chelle nanom\u00e9trique.<\/strong> Ces r\u00e9sultats <em>[2] <\/em>ouvrent ainsi la voie \u00e0 l\u2019utilisation de ces couches atomiques de TaSe2 pour la r\u00e9alisation \u00e0 grande \u00e9chelle de composants neuromorphiques ultracompacts.<\/p>\n<p><span style=\"color: #993300;\"><em>References<\/em><\/span><br \/>\n<em> [1] Stoliar, P.; Tranchant, J.; Corraze, B.; Janod, E.; Besland, M.-P.; Tesler, F.; Rozenberg, M.; Cario, L. A Leaky-Integrate-and-Fire Neuron Analog Realized with a Mott Insulator. <i>Adv. Funct. Mater.<\/i> <b>2017<\/b>, <i>27<\/i>\u00a0(11), 1604740. <a id=\"OWA5fc5d72b-b494-bce5-9d09-7432c0807584\" class=\"OWAAutoLink\" href=\"https:\/\/doi.org\/10.1002\/adfm.201604740\">https:\/\/doi.org\/10.1002\/adfm.201604740<\/a>.<\/em><\/p>\n<p><em>[2] Koussir, H.; Chernukha, Y.; Sthioul, C.; Haber, E.; Peric, N.; Biadala, L.; Capiod, P.; Berthe, M.; Lefebvre, I.; Wallart, X.; Grandidier, B.; Diener, P. Large-Area Epitaxial Mott Insulating 1T-TaSe2 Monolayer on GaP(111)B. <i>Nano Lett.<\/i> <b>2023<\/b>. <a id=\"OWAebe91f2f-69df-5993-1124-41990544568a\" class=\"OWAAutoLink\" href=\"https:\/\/doi.org\/10.1021\/acs.nanolett.3c02813\">https:\/\/doi.org\/10.1021\/acs.nanolett.3c02813<\/a>.<\/em><\/p>\n<div  class='avia-button-wrap av-rpqvoq-b67dacb4cae17050a6b4f3335f62e376-wrap avia-button-left  avia-builder-el-11  el_after_av_font_icon  el_before_av_font_icon'><a href='mailto:pascale.diener@junia.com'  class='avia-button av-rpqvoq-b67dacb4cae17050a6b4f3335f62e376 av-link-btn avia-icon_select-yes-left-icon avia-size-small avia-position-left avia-color-silver'   aria-label=\"pascale.diener@junia.com\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >pascale.diener@junia.com<\/span><\/a><\/div>\n<p><strong>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-wzsvks-3ddca1b12a3d1f6a2d2e6788089b34df\">\n.av_font_icon.av-wzsvks-3ddca1b12a3d1f6a2d2e6788089b34df{\ncolor:#993300;\nborder-color:#993300;\n}\n.av_font_icon.av-wzsvks-3ddca1b12a3d1f6a2d2e6788089b34df .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-wzsvks-3ddca1b12a3d1f6a2d2e6788089b34df avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue826' data-av_iconfont='entypo-fontello' ><\/span><\/span><span style=\"color: #993300;\">Liens site web :<\/span><\/strong><br \/>\n<a href=\"https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/epiphy\/\">https:\/\/www.iemn.fr\/la-recherche\/les-groupes\/epiphy<\/a><br \/>\n<a href=\"https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/epiphy\/\">https:\/\/www.iemn.fr\/la-recherche\/les-groupes\/physique<\/a><\/p>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-61191","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/61191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=61191"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/61191\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=61191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=61191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=61191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}