{"id":32913,"date":"2024-11-29T17:48:35","date_gmt":"2024-11-29T12:18:35","guid":{"rendered":"https:\/\/www.nextias.com\/ca\/?p=32913"},"modified":"2024-11-29T17:48:36","modified_gmt":"2024-11-29T12:18:36","slug":"new-moire-superconductor","status":"publish","type":"post","link":"https:\/\/www.nextias.com\/ca\/current-affairs\/29-11-2024\/new-moire-superconductor","title":{"rendered":"New Moir\u00e9 Superconductor"},"content":{"rendered":"\n<p><strong>Syllabus: GS3\/ S&amp;T<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>In News<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Recent breakthroughs show that semiconductor-based <strong>moir\u00e9 materials<\/strong>, like twisted <strong>bilayer tungsten diselenide (tWSe\u2082)<\/strong>, exhibit superconductivity.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Moir\u00e9 Patterns and Their Impact<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Formation:<\/strong> A moir\u00e9 pattern arises when two identical layers of material are stacked and twisted at a small angle.<\/li>\n\n\n\n<li><strong>Flat Bands: <\/strong>The twist causes the electronic energy bands to flatten, reducing the variation in energy among electrons. This flatness:\n<ul class=\"wp-block-list\">\n<li>Slows electron movement, making them &#8220;heavy.&#8221;<\/li>\n\n\n\n<li>Encourages strong electron-electron interactions, essential for superconductivity.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Superconductivity in Semiconductor Moir\u00e9 Materials<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>tWSe\u2082 Superconductivity:<\/strong> Researchers studied twisted bilayer tungsten diselenide with a 3.65\u00b0 twist.\n<ul class=\"wp-block-list\">\n<li>Superconductivity emerged when the electronic states were half-filled, with a critical temperature of approximately \u2013272.93\u00b0C.<\/li>\n\n\n\n<li>The material showed stability and coherence, making its superconducting state robust and less fragile compared to graphene-based systems.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Mechanism: <\/strong>In tWSe\u2082, superconductivity stems from electron-electron interactions and the half-band filling, contrasting with graphene, where electron-lattice interactions dominate.<\/li>\n\n\n\n<li><strong>Transition to Insulating State: <\/strong>By altering the material&#8217;s electronic configuration, tWSe\u2082 could transition between superconducting and insulating states, revealing its tunability.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Advantages of Semiconductor Moir\u00e9 Systems<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stability: <\/strong>The study on twisted bilayer tungsten diselenide (tWSe\u2082) demonstrates stable superconductivity in semiconductors, marking a significant leap in quantum materials research.<\/li>\n\n\n\n<li><strong>Coherence Length: <\/strong>The material&#8217;s coherence length (distance over which superconductivity persists) is 10 times longer than in other moir\u00e9 materials, making it more robust.<\/li>\n\n\n\n<li><strong>Exploratory Potential:<\/strong> Open doors to designing new quantum materials with tunable electronic and superconducting properties.<\/li>\n<\/ul>\n\n\n\n<p><strong>Source: TH<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recent breakthroughs show that semiconductor-based moir\u00e9 materials, like twisted bilayer tungsten diselenide (tWSe\u2082), exhibit superconductivity.<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-32913","post","type-post","status-publish","format-standard","hentry","category-current-affairs"],"acf":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/32913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/comments?post=32913"}],"version-history":[{"count":1,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/32913\/revisions"}],"predecessor-version":[{"id":32914,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/32913\/revisions\/32914"}],"wp:attachment":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media?parent=32913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/categories?post=32913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/tags?post=32913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}